/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 17:22:45,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:22:45,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:22:45,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 17:22:45,267 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-02-19 17:22:45,301 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:22:45,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:22:45,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 17:22:45,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 17:22:45,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:22:45,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:22:45,305 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:22:45,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:22:45,305 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:22:45,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:22:45,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:22:45,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:22:45,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:22:45,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:22:45,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:22:45,307 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:22:45,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:22:45,307 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:22:45,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:22:45,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:22:45,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:22:45,308 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 17:22:45,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:22:45,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:22:45,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:22:45,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:22:45,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:22:45,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:22:45,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:22:45,309 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 17:22:45,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:22:45,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:22:45,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:22:45,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:22:45,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:22:45,613 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 17:22:45,614 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 17:22:45,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl [2021-02-19 17:22:45,658 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl' [2021-02-19 17:22:45,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:22:45,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:22:45,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 17:22:45,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 17:22:45,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 17:22:45,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:22:45" (1/1) ... [2021-02-19 17:22:45,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:22:45" (1/1) ... [2021-02-19 17:22:45,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 17:22:45,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:22:45,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:22:45,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:22:45,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:22:45" (1/1) ... [2021-02-19 17:22:45,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:22:45" (1/1) ... [2021-02-19 17:22:45,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:22:45" (1/1) ... [2021-02-19 17:22:45,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:22:45" (1/1) ... [2021-02-19 17:22:45,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:22:45" (1/1) ... [2021-02-19 17:22:45,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:22:45" (1/1) ... [2021-02-19 17:22:45,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:22:45" (1/1) ... [2021-02-19 17:22:45,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:22:45,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:22:45,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:22:45,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:22:45,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:22:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:22:45,793 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 17:22:45,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 17:22:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 17:22:45,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 17:22:45,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 17:22:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 17:22:45,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 17:22:45,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:22:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:22:45,795 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 17:22:45,988 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:22:45,988 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-19 17:22:45,989 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-02-19 17:22:45,989 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-02-19 17:22:45,990 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:22:45 BoogieIcfgContainer [2021-02-19 17:22:45,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:22:45,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:22:45,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:22:45,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:22:45,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:22:45" (1/2) ... [2021-02-19 17:22:45,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4f3b76 and model type unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:22:45, skipping insertion in model container [2021-02-19 17:22:45,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:22:45" (2/2) ... [2021-02-19 17:22:45,996 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.bpl [2021-02-19 17:22:46,000 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 17:22:46,000 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:22:46,003 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:22:46,003 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 17:22:46,023 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 17:22:46,036 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 17:22:46,051 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:22:46,051 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:22:46,051 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:22:46,051 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:22:46,052 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:22:46,052 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:22:46,052 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:22:46,052 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:22:46,058 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-02-19 17:22:46,065 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-02-19 17:22:46,070 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:46,071 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:46,071 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:46,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:46,075 INFO L82 PathProgramCache]: Analyzing trace with hash 112592647, now seen corresponding path program 1 times [2021-02-19 17:22:46,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:46,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391471768] [2021-02-19 17:22:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:46,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391471768] [2021-02-19 17:22:46,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:22:46,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 17:22:46,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387241012] [2021-02-19 17:22:46,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 17:22:46,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:46,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 17:22:46,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:22:46,218 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:46,235 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-02-19 17:22:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:22:46,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-02-19 17:22:46,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:46,243 INFO L225 Difference]: With dead ends: 22 [2021-02-19 17:22:46,243 INFO L226 Difference]: Without dead ends: 19 [2021-02-19 17:22:46,245 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:22:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-02-19 17:22:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-02-19 17:22:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-02-19 17:22:46,270 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-02-19 17:22:46,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:46,270 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-02-19 17:22:46,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,270 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-02-19 17:22:46,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-02-19 17:22:46,271 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:46,271 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:46,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:22:46,271 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:46,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:46,272 INFO L82 PathProgramCache]: Analyzing trace with hash 855098057, now seen corresponding path program 1 times [2021-02-19 17:22:46,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:46,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54565179] [2021-02-19 17:22:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:46,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54565179] [2021-02-19 17:22:46,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192091889] [2021-02-19 17:22:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:46,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 17:22:46,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:46,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:46,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-02-19 17:22:46,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380166770] [2021-02-19 17:22:46,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:22:46,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:46,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:22:46,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:22:46,453 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:46,484 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-02-19 17:22:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:22:46,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-02-19 17:22:46,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:46,485 INFO L225 Difference]: With dead ends: 28 [2021-02-19 17:22:46,486 INFO L226 Difference]: Without dead ends: 28 [2021-02-19 17:22:46,486 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:22:46,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-19 17:22:46,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-02-19 17:22:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-02-19 17:22:46,490 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-02-19 17:22:46,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:46,491 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-02-19 17:22:46,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-02-19 17:22:46,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-02-19 17:22:46,491 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:46,492 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:46,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-02-19 17:22:46,698 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:46,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:46,699 INFO L82 PathProgramCache]: Analyzing trace with hash -781520718, now seen corresponding path program 1 times [2021-02-19 17:22:46,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:46,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993113556] [2021-02-19 17:22:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:46,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993113556] [2021-02-19 17:22:46,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:22:46,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:22:46,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26708348] [2021-02-19 17:22:46,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:22:46,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:46,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:22:46,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:22:46,751 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:46,786 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-02-19 17:22:46,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:22:46,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-02-19 17:22:46,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:46,788 INFO L225 Difference]: With dead ends: 22 [2021-02-19 17:22:46,788 INFO L226 Difference]: Without dead ends: 18 [2021-02-19 17:22:46,788 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:22:46,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-02-19 17:22:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-02-19 17:22:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-02-19 17:22:46,792 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-02-19 17:22:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:46,802 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-02-19 17:22:46,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,802 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-02-19 17:22:46,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-02-19 17:22:46,802 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:46,803 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:46,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:22:46,803 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:46,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:46,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1773100970, now seen corresponding path program 2 times [2021-02-19 17:22:46,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:46,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072767858] [2021-02-19 17:22:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:46,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072767858] [2021-02-19 17:22:46,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:22:46,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:22:46,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668989179] [2021-02-19 17:22:46,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:22:46,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:46,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:22:46,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:22:46,860 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:46,880 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-02-19 17:22:46,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:22:46,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-02-19 17:22:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:46,884 INFO L225 Difference]: With dead ends: 20 [2021-02-19 17:22:46,884 INFO L226 Difference]: Without dead ends: 20 [2021-02-19 17:22:46,884 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:22:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-02-19 17:22:46,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-02-19 17:22:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-02-19 17:22:46,898 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-02-19 17:22:46,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:46,898 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-02-19 17:22:46,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:46,898 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-02-19 17:22:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:22:46,899 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:46,899 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:46,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:22:46,899 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:46,902 INFO L82 PathProgramCache]: Analyzing trace with hash 761310512, now seen corresponding path program 1 times [2021-02-19 17:22:46,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:46,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904931505] [2021-02-19 17:22:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:46,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904931505] [2021-02-19 17:22:46,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953726774] [2021-02-19 17:22:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:46,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:22:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:47,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:47,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-02-19 17:22:47,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403924409] [2021-02-19 17:22:47,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:22:47,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:47,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:22:47,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:22:47,042 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:47,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:47,061 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-02-19 17:22:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:22:47,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-02-19 17:22:47,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:47,063 INFO L225 Difference]: With dead ends: 24 [2021-02-19 17:22:47,063 INFO L226 Difference]: Without dead ends: 24 [2021-02-19 17:22:47,063 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:22:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-02-19 17:22:47,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-02-19 17:22:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-02-19 17:22:47,067 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-02-19 17:22:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:47,067 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-02-19 17:22:47,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-02-19 17:22:47,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:22:47,067 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:47,068 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:47,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:47,291 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:47,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:47,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1344438386, now seen corresponding path program 2 times [2021-02-19 17:22:47,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:47,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618689532] [2021-02-19 17:22:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:47,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618689532] [2021-02-19 17:22:47,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141820458] [2021-02-19 17:22:47,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:22:47,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:22:47,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:47,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:22:47,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:47,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:47,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-02-19 17:22:47,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:22:47,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:47,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:22:47,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-02-19 17:22:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:47,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:47,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-02-19 17:22:47,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56650232] [2021-02-19 17:22:47,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:22:47,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:47,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:22:47,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:47,536 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:47,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:47,579 INFO L93 Difference]: Finished difference Result 54 states and 96 transitions. [2021-02-19 17:22:47,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:22:47,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-02-19 17:22:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:47,583 INFO L225 Difference]: With dead ends: 54 [2021-02-19 17:22:47,583 INFO L226 Difference]: Without dead ends: 51 [2021-02-19 17:22:47,583 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-19 17:22:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2021-02-19 17:22:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2021-02-19 17:22:47,588 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2021-02-19 17:22:47,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:47,588 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2021-02-19 17:22:47,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:47,588 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2021-02-19 17:22:47,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:22:47,589 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:47,589 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:47,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:47,790 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:47,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1207004366, now seen corresponding path program 3 times [2021-02-19 17:22:47,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:47,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369949692] [2021-02-19 17:22:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:47,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369949692] [2021-02-19 17:22:47,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453231710] [2021-02-19 17:22:47,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:47,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:22:47,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:47,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:22:47,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:47,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:47,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-02-19 17:22:47,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:22:47,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:47,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:22:47,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-02-19 17:22:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:47,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:47,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-02-19 17:22:47,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689182328] [2021-02-19 17:22:47,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:22:47,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:47,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:22:47,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:47,940 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:47,973 INFO L93 Difference]: Finished difference Result 61 states and 117 transitions. [2021-02-19 17:22:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:22:47,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-02-19 17:22:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:47,974 INFO L225 Difference]: With dead ends: 61 [2021-02-19 17:22:47,974 INFO L226 Difference]: Without dead ends: 58 [2021-02-19 17:22:47,975 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-19 17:22:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2021-02-19 17:22:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 87 transitions. [2021-02-19 17:22:47,980 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 87 transitions. Word has length 12 [2021-02-19 17:22:47,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:47,980 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 87 transitions. [2021-02-19 17:22:47,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 87 transitions. [2021-02-19 17:22:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:22:47,981 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:47,981 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:48,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:48,203 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:48,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:48,203 INFO L82 PathProgramCache]: Analyzing trace with hash -581212054, now seen corresponding path program 4 times [2021-02-19 17:22:48,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:48,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983405308] [2021-02-19 17:22:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:48,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983405308] [2021-02-19 17:22:48,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717340898] [2021-02-19 17:22:48,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:48,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:22:48,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:48,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:22:48,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:48,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:48,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-02-19 17:22:48,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:22:48,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:48,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:22:48,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-02-19 17:22:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:48,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:48,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-02-19 17:22:48,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439416213] [2021-02-19 17:22:48,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:22:48,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:48,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:22:48,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:48,341 INFO L87 Difference]: Start difference. First operand 39 states and 87 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:48,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:48,390 INFO L93 Difference]: Finished difference Result 68 states and 138 transitions. [2021-02-19 17:22:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:22:48,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-02-19 17:22:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:48,394 INFO L225 Difference]: With dead ends: 68 [2021-02-19 17:22:48,395 INFO L226 Difference]: Without dead ends: 65 [2021-02-19 17:22:48,395 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:48,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-02-19 17:22:48,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2021-02-19 17:22:48,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4) internal successors, (108), 45 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 108 transitions. [2021-02-19 17:22:48,412 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 108 transitions. Word has length 12 [2021-02-19 17:22:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:48,413 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 108 transitions. [2021-02-19 17:22:48,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 108 transitions. [2021-02-19 17:22:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:48,414 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:48,414 INFO L506 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:48,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:48,615 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:48,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:48,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2053434000, now seen corresponding path program 5 times [2021-02-19 17:22:48,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:48,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41873283] [2021-02-19 17:22:48,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:48,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41873283] [2021-02-19 17:22:48,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555981564] [2021-02-19 17:22:48,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:48,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:22:48,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:48,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:48,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:48,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:48,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-02-19 17:22:48,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502027530] [2021-02-19 17:22:48,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:22:48,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:48,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:22:48,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:48,764 INFO L87 Difference]: Start difference. First operand 46 states and 108 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:48,853 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-02-19 17:22:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:22:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:48,854 INFO L225 Difference]: With dead ends: 90 [2021-02-19 17:22:48,854 INFO L226 Difference]: Without dead ends: 90 [2021-02-19 17:22:48,854 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:22:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-19 17:22:48,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2021-02-19 17:22:48,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:48,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 110 transitions. [2021-02-19 17:22:48,867 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 110 transitions. Word has length 13 [2021-02-19 17:22:48,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:48,867 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 110 transitions. [2021-02-19 17:22:48,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:48,868 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 110 transitions. [2021-02-19 17:22:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:48,868 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:48,868 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:49,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:49,069 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:49,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:49,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1249008473, now seen corresponding path program 6 times [2021-02-19 17:22:49,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:49,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198311608] [2021-02-19 17:22:49,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:49,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198311608] [2021-02-19 17:22:49,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272928110] [2021-02-19 17:22:49,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:49,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:22:49,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:49,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:49,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:49,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:49,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-02-19 17:22:49,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712961194] [2021-02-19 17:22:49,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:22:49,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:49,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:22:49,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:49,184 INFO L87 Difference]: Start difference. First operand 46 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:49,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:49,272 INFO L93 Difference]: Finished difference Result 87 states and 172 transitions. [2021-02-19 17:22:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:22:49,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:49,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:49,273 INFO L225 Difference]: With dead ends: 87 [2021-02-19 17:22:49,273 INFO L226 Difference]: Without dead ends: 82 [2021-02-19 17:22:49,273 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:49,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-02-19 17:22:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2021-02-19 17:22:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.418181818181818) internal successors, (133), 55 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 133 transitions. [2021-02-19 17:22:49,277 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 133 transitions. Word has length 13 [2021-02-19 17:22:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:49,277 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 133 transitions. [2021-02-19 17:22:49,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 133 transitions. [2021-02-19 17:22:49,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:49,278 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:49,278 INFO L506 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:49,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 17:22:49,498 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:49,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:49,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1435545234, now seen corresponding path program 7 times [2021-02-19 17:22:49,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:49,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976329656] [2021-02-19 17:22:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:49,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976329656] [2021-02-19 17:22:49,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581318139] [2021-02-19 17:22:49,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:22:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:49,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:49,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:49,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:49,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:22:49,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88601837] [2021-02-19 17:22:49,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:22:49,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:49,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:22:49,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:22:49,629 INFO L87 Difference]: Start difference. First operand 56 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:49,692 INFO L93 Difference]: Finished difference Result 71 states and 152 transitions. [2021-02-19 17:22:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:22:49,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:49,693 INFO L225 Difference]: With dead ends: 71 [2021-02-19 17:22:49,693 INFO L226 Difference]: Without dead ends: 70 [2021-02-19 17:22:49,694 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:22:49,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-19 17:22:49,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2021-02-19 17:22:49,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-02-19 17:22:49,703 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-02-19 17:22:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:49,703 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-02-19 17:22:49,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-02-19 17:22:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:49,704 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:49,704 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:49,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-02-19 17:22:49,919 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:49,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:49,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1942365709, now seen corresponding path program 8 times [2021-02-19 17:22:49,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:49,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62484915] [2021-02-19 17:22:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:49,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62484915] [2021-02-19 17:22:49,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908308754] [2021-02-19 17:22:49,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:49,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:22:49,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:49,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:49,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:50,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:50,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:22:50,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469163260] [2021-02-19 17:22:50,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:22:50,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:50,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:22:50,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:22:50,027 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:50,064 INFO L93 Difference]: Finished difference Result 88 states and 173 transitions. [2021-02-19 17:22:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:22:50,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:50,065 INFO L225 Difference]: With dead ends: 88 [2021-02-19 17:22:50,065 INFO L226 Difference]: Without dead ends: 88 [2021-02-19 17:22:50,066 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:50,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-02-19 17:22:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2021-02-19 17:22:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-02-19 17:22:50,076 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-02-19 17:22:50,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:50,076 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-02-19 17:22:50,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-02-19 17:22:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:50,079 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:50,079 INFO L506 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:50,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:50,301 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:50,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:50,301 INFO L82 PathProgramCache]: Analyzing trace with hash 315882856, now seen corresponding path program 9 times [2021-02-19 17:22:50,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:50,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304230065] [2021-02-19 17:22:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:50,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304230065] [2021-02-19 17:22:50,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049885553] [2021-02-19 17:22:50,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:50,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:22:50,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:50,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:50,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:50,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:50,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:22:50,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216303701] [2021-02-19 17:22:50,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:22:50,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:50,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:22:50,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:22:50,423 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:50,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:50,452 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-02-19 17:22:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:22:50,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:50,453 INFO L225 Difference]: With dead ends: 97 [2021-02-19 17:22:50,453 INFO L226 Difference]: Without dead ends: 97 [2021-02-19 17:22:50,454 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-02-19 17:22:50,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 60. [2021-02-19 17:22:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 59 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:50,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 143 transitions. [2021-02-19 17:22:50,458 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 143 transitions. Word has length 13 [2021-02-19 17:22:50,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:50,458 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 143 transitions. [2021-02-19 17:22:50,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:50,459 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 143 transitions. [2021-02-19 17:22:50,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:50,459 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:50,459 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:50,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:50,680 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:50,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:50,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1260644839, now seen corresponding path program 10 times [2021-02-19 17:22:50,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:50,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399150174] [2021-02-19 17:22:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:50,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399150174] [2021-02-19 17:22:50,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480000987] [2021-02-19 17:22:50,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:50,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:22:50,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:50,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:50,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:50,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:50,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:22:50,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161723949] [2021-02-19 17:22:50,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:22:50,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:50,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:22:50,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:22:50,791 INFO L87 Difference]: Start difference. First operand 60 states and 143 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:50,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:50,848 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2021-02-19 17:22:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:22:50,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:50,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:50,852 INFO L225 Difference]: With dead ends: 99 [2021-02-19 17:22:50,852 INFO L226 Difference]: Without dead ends: 97 [2021-02-19 17:22:50,852 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:22:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-02-19 17:22:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2021-02-19 17:22:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 63 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2021-02-19 17:22:50,855 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 13 [2021-02-19 17:22:50,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:50,855 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2021-02-19 17:22:50,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:50,856 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2021-02-19 17:22:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:50,856 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:50,856 INFO L506 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:51,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 17:22:51,071 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:51,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:51,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2061337546, now seen corresponding path program 11 times [2021-02-19 17:22:51,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:51,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391040927] [2021-02-19 17:22:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:51,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391040927] [2021-02-19 17:22:51,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002282602] [2021-02-19 17:22:51,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:51,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:22:51,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:51,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:51,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:51,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:51,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:22:51,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681620254] [2021-02-19 17:22:51,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:22:51,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:51,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:22:51,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:22:51,164 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:51,219 INFO L93 Difference]: Finished difference Result 101 states and 205 transitions. [2021-02-19 17:22:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:22:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:51,221 INFO L225 Difference]: With dead ends: 101 [2021-02-19 17:22:51,221 INFO L226 Difference]: Without dead ends: 100 [2021-02-19 17:22:51,221 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:22:51,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-02-19 17:22:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2021-02-19 17:22:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:51,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-02-19 17:22:51,224 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-02-19 17:22:51,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:51,224 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-02-19 17:22:51,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-02-19 17:22:51,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:51,225 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:51,225 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:51,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 17:22:51,438 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:51,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:51,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1316573397, now seen corresponding path program 12 times [2021-02-19 17:22:51,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:51,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627704634] [2021-02-19 17:22:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:51,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627704634] [2021-02-19 17:22:51,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447146992] [2021-02-19 17:22:51,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:51,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:22:51,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:51,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:51,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:51,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:51,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 17:22:51,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839504580] [2021-02-19 17:22:51,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:22:51,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:51,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:22:51,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:22:51,528 INFO L87 Difference]: Start difference. First operand 64 states and 156 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:51,559 INFO L93 Difference]: Finished difference Result 98 states and 199 transitions. [2021-02-19 17:22:51,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:22:51,562 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:51,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:51,562 INFO L225 Difference]: With dead ends: 98 [2021-02-19 17:22:51,562 INFO L226 Difference]: Without dead ends: 98 [2021-02-19 17:22:51,563 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-02-19 17:22:51,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2021-02-19 17:22:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-02-19 17:22:51,566 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-02-19 17:22:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:51,566 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-02-19 17:22:51,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-02-19 17:22:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:51,566 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:51,566 INFO L506 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:51,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 17:22:51,774 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:51,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:51,774 INFO L82 PathProgramCache]: Analyzing trace with hash -523016442, now seen corresponding path program 13 times [2021-02-19 17:22:51,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:51,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748822138] [2021-02-19 17:22:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:51,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748822138] [2021-02-19 17:22:51,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339475724] [2021-02-19 17:22:51,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:51,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:51,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:51,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:51,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-02-19 17:22:51,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763968528] [2021-02-19 17:22:51,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:22:51,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:51,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:22:51,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:51,882 INFO L87 Difference]: Start difference. First operand 64 states and 156 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:51,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:51,964 INFO L93 Difference]: Finished difference Result 94 states and 196 transitions. [2021-02-19 17:22:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:22:51,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:51,965 INFO L225 Difference]: With dead ends: 94 [2021-02-19 17:22:51,965 INFO L226 Difference]: Without dead ends: 92 [2021-02-19 17:22:51,965 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:22:51,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-19 17:22:51,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-02-19 17:22:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-02-19 17:22:51,970 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-02-19 17:22:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:51,970 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-02-19 17:22:51,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-02-19 17:22:51,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:51,971 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:51,971 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:52,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:52,186 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:52,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:52,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1249346565, now seen corresponding path program 14 times [2021-02-19 17:22:52,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:52,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991792919] [2021-02-19 17:22:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:52,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991792919] [2021-02-19 17:22:52,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094707965] [2021-02-19 17:22:52,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:52,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:22:52,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:52,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:52,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:52,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:52,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-02-19 17:22:52,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861917552] [2021-02-19 17:22:52,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:22:52,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:52,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:22:52,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:52,299 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:52,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:52,355 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-02-19 17:22:52,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:22:52,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:52,361 INFO L225 Difference]: With dead ends: 101 [2021-02-19 17:22:52,361 INFO L226 Difference]: Without dead ends: 101 [2021-02-19 17:22:52,361 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:22:52,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-02-19 17:22:52,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2021-02-19 17:22:52,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:52,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-02-19 17:22:52,363 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-02-19 17:22:52,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:52,364 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-02-19 17:22:52,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:52,364 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-02-19 17:22:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:52,364 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:52,364 INFO L506 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:52,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 17:22:52,578 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:52,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:52,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1759391952, now seen corresponding path program 15 times [2021-02-19 17:22:52,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:52,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852982462] [2021-02-19 17:22:52,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:52,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852982462] [2021-02-19 17:22:52,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081968201] [2021-02-19 17:22:52,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:52,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:22:52,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:52,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:52,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:52,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:52,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-02-19 17:22:52,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63418043] [2021-02-19 17:22:52,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:22:52,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:52,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:22:52,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:52,676 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:52,711 INFO L93 Difference]: Finished difference Result 118 states and 240 transitions. [2021-02-19 17:22:52,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:22:52,711 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:52,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:52,712 INFO L225 Difference]: With dead ends: 118 [2021-02-19 17:22:52,712 INFO L226 Difference]: Without dead ends: 118 [2021-02-19 17:22:52,712 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:22:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-02-19 17:22:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 69. [2021-02-19 17:22:52,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.5294117647058822) internal successors, (172), 68 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:52,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2021-02-19 17:22:52,715 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 13 [2021-02-19 17:22:52,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:52,715 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2021-02-19 17:22:52,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:52,716 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2021-02-19 17:22:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:52,716 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:52,716 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:52,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:52,937 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:52,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:52,937 INFO L82 PathProgramCache]: Analyzing trace with hash -814629969, now seen corresponding path program 16 times [2021-02-19 17:22:52,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:52,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879629399] [2021-02-19 17:22:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:52,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879629399] [2021-02-19 17:22:52,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185738153] [2021-02-19 17:22:52,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:52,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:22:52,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:52,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:52,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:53,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:53,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-02-19 17:22:53,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084807919] [2021-02-19 17:22:53,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:22:53,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:53,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:22:53,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:53,027 INFO L87 Difference]: Start difference. First operand 69 states and 172 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:53,102 INFO L93 Difference]: Finished difference Result 109 states and 231 transitions. [2021-02-19 17:22:53,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:22:53,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:53,108 INFO L225 Difference]: With dead ends: 109 [2021-02-19 17:22:53,108 INFO L226 Difference]: Without dead ends: 107 [2021-02-19 17:22:53,108 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:22:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-02-19 17:22:53,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2021-02-19 17:22:53,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5945945945945947) internal successors, (192), 74 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-02-19 17:22:53,112 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 13 [2021-02-19 17:22:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:53,112 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-02-19 17:22:53,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-02-19 17:22:53,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:53,113 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:53,113 INFO L506 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:53,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:53,322 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:53,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:53,322 INFO L82 PathProgramCache]: Analyzing trace with hash -13937262, now seen corresponding path program 17 times [2021-02-19 17:22:53,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:53,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281540168] [2021-02-19 17:22:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:53,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281540168] [2021-02-19 17:22:53,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988482347] [2021-02-19 17:22:53,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:53,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:22:53,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:53,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:53,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:53,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:53,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-02-19 17:22:53,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85742762] [2021-02-19 17:22:53,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:22:53,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:53,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:22:53,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:53,419 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:53,476 INFO L93 Difference]: Finished difference Result 114 states and 244 transitions. [2021-02-19 17:22:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:22:53,476 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:53,477 INFO L225 Difference]: With dead ends: 114 [2021-02-19 17:22:53,477 INFO L226 Difference]: Without dead ends: 113 [2021-02-19 17:22:53,477 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:22:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-19 17:22:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 75. [2021-02-19 17:22:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.581081081081081) internal successors, (191), 74 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 191 transitions. [2021-02-19 17:22:53,480 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 191 transitions. Word has length 13 [2021-02-19 17:22:53,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:53,480 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 191 transitions. [2021-02-19 17:22:53,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 191 transitions. [2021-02-19 17:22:53,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:53,484 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:53,484 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:53,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 17:22:53,690 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:53,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:53,690 INFO L82 PathProgramCache]: Analyzing trace with hash 903119091, now seen corresponding path program 18 times [2021-02-19 17:22:53,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:53,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279605457] [2021-02-19 17:22:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:53,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279605457] [2021-02-19 17:22:53,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583915715] [2021-02-19 17:22:53,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:53,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:22:53,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:53,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:53,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:53,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-02-19 17:22:53,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836336330] [2021-02-19 17:22:53,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:22:53,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:53,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:22:53,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:22:53,806 INFO L87 Difference]: Start difference. First operand 75 states and 191 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:53,882 INFO L93 Difference]: Finished difference Result 102 states and 223 transitions. [2021-02-19 17:22:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:22:53,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:53,883 INFO L225 Difference]: With dead ends: 102 [2021-02-19 17:22:53,883 INFO L226 Difference]: Without dead ends: 102 [2021-02-19 17:22:53,883 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:22:53,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-02-19 17:22:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-02-19 17:22:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-02-19 17:22:53,885 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 13 [2021-02-19 17:22:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:53,885 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-02-19 17:22:53,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-02-19 17:22:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:53,886 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:53,886 INFO L506 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:54,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:54,102 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:54,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:54,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1696676046, now seen corresponding path program 19 times [2021-02-19 17:22:54,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:54,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441536411] [2021-02-19 17:22:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:54,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441536411] [2021-02-19 17:22:54,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707056000] [2021-02-19 17:22:54,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:22:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:54,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:54,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:54,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:54,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 17:22:54,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798929229] [2021-02-19 17:22:54,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:22:54,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:54,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:22:54,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:22:54,205 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:54,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:54,279 INFO L93 Difference]: Finished difference Result 118 states and 244 transitions. [2021-02-19 17:22:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:22:54,280 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:54,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:54,280 INFO L225 Difference]: With dead ends: 118 [2021-02-19 17:22:54,280 INFO L226 Difference]: Without dead ends: 116 [2021-02-19 17:22:54,281 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-02-19 17:22:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 74. [2021-02-19 17:22:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:54,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-02-19 17:22:54,284 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-02-19 17:22:54,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:54,284 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-02-19 17:22:54,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:54,284 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-02-19 17:22:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:54,285 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:54,285 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:54,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 17:22:54,502 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:54,502 INFO L82 PathProgramCache]: Analyzing trace with hash -825928243, now seen corresponding path program 20 times [2021-02-19 17:22:54,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:54,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408804229] [2021-02-19 17:22:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:54,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408804229] [2021-02-19 17:22:54,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260644907] [2021-02-19 17:22:54,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:54,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:22:54,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:54,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:54,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:54,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:54,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 17:22:54,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063815764] [2021-02-19 17:22:54,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:22:54,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:54,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:22:54,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:22:54,615 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:54,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:54,693 INFO L93 Difference]: Finished difference Result 103 states and 223 transitions. [2021-02-19 17:22:54,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:22:54,694 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:54,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:54,694 INFO L225 Difference]: With dead ends: 103 [2021-02-19 17:22:54,694 INFO L226 Difference]: Without dead ends: 103 [2021-02-19 17:22:54,695 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-02-19 17:22:54,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2021-02-19 17:22:54,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-02-19 17:22:54,697 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-02-19 17:22:54,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:54,697 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-02-19 17:22:54,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:54,697 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-02-19 17:22:54,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:54,697 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:54,698 INFO L506 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:54,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 17:22:54,919 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:54,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1108886254, now seen corresponding path program 21 times [2021-02-19 17:22:54,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:54,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351740647] [2021-02-19 17:22:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:54,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351740647] [2021-02-19 17:22:54,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572036751] [2021-02-19 17:22:54,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:54,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:22:54,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:54,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:54,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:55,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:55,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-02-19 17:22:55,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324160273] [2021-02-19 17:22:55,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:22:55,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:55,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:22:55,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:22:55,042 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:55,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:55,119 INFO L93 Difference]: Finished difference Result 107 states and 246 transitions. [2021-02-19 17:22:55,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:22:55,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:55,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:55,120 INFO L225 Difference]: With dead ends: 107 [2021-02-19 17:22:55,120 INFO L226 Difference]: Without dead ends: 104 [2021-02-19 17:22:55,121 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:22:55,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-02-19 17:22:55,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2021-02-19 17:22:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5277777777777777) internal successors, (182), 72 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:55,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2021-02-19 17:22:55,123 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 13 [2021-02-19 17:22:55,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:55,123 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2021-02-19 17:22:55,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2021-02-19 17:22:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:22:55,123 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:55,123 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:55,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:55,345 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:55,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1408179251, now seen corresponding path program 22 times [2021-02-19 17:22:55,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:55,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125682098] [2021-02-19 17:22:55,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:55,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125682098] [2021-02-19 17:22:55,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394529995] [2021-02-19 17:22:55,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:55,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:22:55,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:55,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:22:55,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:55,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:55,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-02-19 17:22:55,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603469005] [2021-02-19 17:22:55,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:22:55,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:55,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:22:55,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:22:55,458 INFO L87 Difference]: Start difference. First operand 73 states and 182 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:55,592 INFO L93 Difference]: Finished difference Result 107 states and 252 transitions. [2021-02-19 17:22:55,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:22:55,592 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:22:55,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:55,593 INFO L225 Difference]: With dead ends: 107 [2021-02-19 17:22:55,593 INFO L226 Difference]: Without dead ends: 107 [2021-02-19 17:22:55,593 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:22:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-02-19 17:22:55,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-02-19 17:22:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5421686746987953) internal successors, (211), 83 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2021-02-19 17:22:55,596 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 13 [2021-02-19 17:22:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:55,596 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2021-02-19 17:22:55,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2021-02-19 17:22:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:22:55,597 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:55,597 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:55,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 17:22:55,806 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:55,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:55,806 INFO L82 PathProgramCache]: Analyzing trace with hash 791129961, now seen corresponding path program 23 times [2021-02-19 17:22:55,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:55,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978188194] [2021-02-19 17:22:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:22:55,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978188194] [2021-02-19 17:22:55,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280068631] [2021-02-19 17:22:55,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:55,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:22:55,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:55,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 17:22:55,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:22:55,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:55,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-02-19 17:22:55,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963268224] [2021-02-19 17:22:55,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:22:55,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:55,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:22:55,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:22:55,919 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:55,959 INFO L93 Difference]: Finished difference Result 227 states and 579 transitions. [2021-02-19 17:22:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:22:55,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-02-19 17:22:55,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:55,962 INFO L225 Difference]: With dead ends: 227 [2021-02-19 17:22:55,962 INFO L226 Difference]: Without dead ends: 225 [2021-02-19 17:22:55,962 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:22:55,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-02-19 17:22:55,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2021-02-19 17:22:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.6347305389221556) internal successors, (440), 167 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 440 transitions. [2021-02-19 17:22:55,974 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 440 transitions. Word has length 14 [2021-02-19 17:22:55,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:55,974 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 440 transitions. [2021-02-19 17:22:55,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 440 transitions. [2021-02-19 17:22:55,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:22:55,976 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:55,976 INFO L506 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:56,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:56,195 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:56,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:56,196 INFO L82 PathProgramCache]: Analyzing trace with hash -389088025, now seen corresponding path program 24 times [2021-02-19 17:22:56,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:56,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371940451] [2021-02-19 17:22:56,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:56,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371940451] [2021-02-19 17:22:56,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128875581] [2021-02-19 17:22:56,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:22:56,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:22:56,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:56,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:22:56,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:56,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:56,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-02-19 17:22:56,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:22:56,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:56,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:22:56,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-02-19 17:22:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:56,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:56,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-02-19 17:22:56,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901437659] [2021-02-19 17:22:56,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:22:56,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:56,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:22:56,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:56,469 INFO L87 Difference]: Start difference. First operand 168 states and 440 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:56,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:56,557 INFO L93 Difference]: Finished difference Result 248 states and 589 transitions. [2021-02-19 17:22:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:22:56,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:22:56,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:56,559 INFO L225 Difference]: With dead ends: 248 [2021-02-19 17:22:56,559 INFO L226 Difference]: Without dead ends: 245 [2021-02-19 17:22:56,559 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-02-19 17:22:56,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 196. [2021-02-19 17:22:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6666666666666665) internal successors, (520), 195 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:56,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 520 transitions. [2021-02-19 17:22:56,564 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 520 transitions. Word has length 15 [2021-02-19 17:22:56,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:56,565 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 520 transitions. [2021-02-19 17:22:56,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:56,565 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 520 transitions. [2021-02-19 17:22:56,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:22:56,566 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:56,566 INFO L506 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:56,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 17:22:56,770 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2109267013, now seen corresponding path program 25 times [2021-02-19 17:22:56,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:56,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805516599] [2021-02-19 17:22:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:56,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805516599] [2021-02-19 17:22:56,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593896633] [2021-02-19 17:22:56,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:56,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:22:56,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:56,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:56,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-02-19 17:22:56,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:22:56,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:56,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:22:56,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-02-19 17:22:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:56,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:56,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-02-19 17:22:56,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612464025] [2021-02-19 17:22:56,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:22:56,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:56,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:22:56,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:56,969 INFO L87 Difference]: Start difference. First operand 196 states and 520 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:57,048 INFO L93 Difference]: Finished difference Result 296 states and 729 transitions. [2021-02-19 17:22:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:22:57,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:22:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:57,050 INFO L225 Difference]: With dead ends: 296 [2021-02-19 17:22:57,050 INFO L226 Difference]: Without dead ends: 292 [2021-02-19 17:22:57,051 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-02-19 17:22:57,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 224. [2021-02-19 17:22:57,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.789237668161435) internal successors, (622), 223 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:57,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 622 transitions. [2021-02-19 17:22:57,056 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 622 transitions. Word has length 15 [2021-02-19 17:22:57,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:57,056 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 622 transitions. [2021-02-19 17:22:57,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:57,057 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 622 transitions. [2021-02-19 17:22:57,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:22:57,057 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:57,057 INFO L506 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:57,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 17:22:57,279 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:57,279 INFO L82 PathProgramCache]: Analyzing trace with hash -2026867597, now seen corresponding path program 26 times [2021-02-19 17:22:57,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:57,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994834264] [2021-02-19 17:22:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:22:57,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994834264] [2021-02-19 17:22:57,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637916060] [2021-02-19 17:22:57,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:22:57,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:22:57,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:57,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:22:57,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:57,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:57,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-02-19 17:22:57,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:22:57,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:57,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:22:57,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-02-19 17:22:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:57,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:57,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-02-19 17:22:57,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973130995] [2021-02-19 17:22:57,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:22:57,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:57,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:22:57,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:57,491 INFO L87 Difference]: Start difference. First operand 224 states and 622 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:57,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:57,579 INFO L93 Difference]: Finished difference Result 353 states and 901 transitions. [2021-02-19 17:22:57,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:22:57,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:22:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:57,581 INFO L225 Difference]: With dead ends: 353 [2021-02-19 17:22:57,581 INFO L226 Difference]: Without dead ends: 349 [2021-02-19 17:22:57,582 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:57,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-02-19 17:22:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 269. [2021-02-19 17:22:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.906716417910448) internal successors, (779), 268 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 779 transitions. [2021-02-19 17:22:57,588 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 779 transitions. Word has length 15 [2021-02-19 17:22:57,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:57,589 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 779 transitions. [2021-02-19 17:22:57,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 779 transitions. [2021-02-19 17:22:57,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:22:57,590 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:57,590 INFO L506 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:57,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 17:22:57,810 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:57,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:57,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1398021627, now seen corresponding path program 27 times [2021-02-19 17:22:57,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:57,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201223580] [2021-02-19 17:22:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:57,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201223580] [2021-02-19 17:22:57,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591762241] [2021-02-19 17:22:57,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:57,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:22:57,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:57,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:22:57,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:57,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:57,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-02-19 17:22:57,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:22:57,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:57,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:22:57,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-02-19 17:22:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:57,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:57,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-02-19 17:22:57,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051073572] [2021-02-19 17:22:57,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:22:57,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:57,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:22:57,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:57,990 INFO L87 Difference]: Start difference. First operand 269 states and 779 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:58,091 INFO L93 Difference]: Finished difference Result 397 states and 1046 transitions. [2021-02-19 17:22:58,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:22:58,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:22:58,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:58,094 INFO L225 Difference]: With dead ends: 397 [2021-02-19 17:22:58,094 INFO L226 Difference]: Without dead ends: 394 [2021-02-19 17:22:58,094 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-02-19 17:22:58,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 318. [2021-02-19 17:22:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.9589905362776023) internal successors, (938), 317 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 938 transitions. [2021-02-19 17:22:58,102 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 938 transitions. Word has length 15 [2021-02-19 17:22:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:58,102 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 938 transitions. [2021-02-19 17:22:58,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 938 transitions. [2021-02-19 17:22:58,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:22:58,103 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:58,103 INFO L506 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:58,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:58,324 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:58,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:58,324 INFO L82 PathProgramCache]: Analyzing trace with hash 916334259, now seen corresponding path program 28 times [2021-02-19 17:22:58,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:58,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896547218] [2021-02-19 17:22:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:58,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896547218] [2021-02-19 17:22:58,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758202557] [2021-02-19 17:22:58,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:58,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:22:58,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:58,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 17:22:58,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:58,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:58,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-02-19 17:22:58,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:22:58,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:58,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:22:58,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-02-19 17:22:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:58,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:58,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-02-19 17:22:58,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017411060] [2021-02-19 17:22:58,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:22:58,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:58,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:22:58,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:58,519 INFO L87 Difference]: Start difference. First operand 318 states and 938 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:58,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:58,605 INFO L93 Difference]: Finished difference Result 427 states and 1156 transitions. [2021-02-19 17:22:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:22:58,605 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:22:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:58,607 INFO L225 Difference]: With dead ends: 427 [2021-02-19 17:22:58,607 INFO L226 Difference]: Without dead ends: 424 [2021-02-19 17:22:58,609 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:22:58,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-02-19 17:22:58,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 357. [2021-02-19 17:22:58,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.9831460674157304) internal successors, (1062), 356 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:58,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1062 transitions. [2021-02-19 17:22:58,618 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1062 transitions. Word has length 15 [2021-02-19 17:22:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:58,619 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 1062 transitions. [2021-02-19 17:22:58,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:58,619 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1062 transitions. [2021-02-19 17:22:58,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:22:58,620 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:58,620 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:58,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:58,834 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:58,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:58,834 INFO L82 PathProgramCache]: Analyzing trace with hash 846247634, now seen corresponding path program 29 times [2021-02-19 17:22:58,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:58,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887752979] [2021-02-19 17:22:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:58,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887752979] [2021-02-19 17:22:58,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131930945] [2021-02-19 17:22:58,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:58,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:22:58,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:58,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:22:58,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:58,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:58,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-02-19 17:22:58,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053096047] [2021-02-19 17:22:58,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:22:58,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:58,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:22:58,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:22:58,969 INFO L87 Difference]: Start difference. First operand 357 states and 1062 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:59,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:59,105 INFO L93 Difference]: Finished difference Result 482 states and 1270 transitions. [2021-02-19 17:22:59,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:22:59,106 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:22:59,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:59,108 INFO L225 Difference]: With dead ends: 482 [2021-02-19 17:22:59,108 INFO L226 Difference]: Without dead ends: 475 [2021-02-19 17:22:59,108 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:22:59,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-02-19 17:22:59,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 372. [2021-02-19 17:22:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9838274932614555) internal successors, (1107), 371 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1107 transitions. [2021-02-19 17:22:59,118 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1107 transitions. Word has length 16 [2021-02-19 17:22:59,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:59,118 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 1107 transitions. [2021-02-19 17:22:59,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:59,118 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1107 transitions. [2021-02-19 17:22:59,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:22:59,119 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:59,119 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:59,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:59,338 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:59,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:59,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1750208438, now seen corresponding path program 30 times [2021-02-19 17:22:59,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:59,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586909980] [2021-02-19 17:22:59,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:59,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586909980] [2021-02-19 17:22:59,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872461997] [2021-02-19 17:22:59,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:59,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:22:59,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:22:59,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:22:59,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:59,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:59,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:22:59,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860823523] [2021-02-19 17:22:59,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:22:59,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:59,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:22:59,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:22:59,452 INFO L87 Difference]: Start difference. First operand 372 states and 1107 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:59,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:59,497 INFO L93 Difference]: Finished difference Result 490 states and 1284 transitions. [2021-02-19 17:22:59,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:22:59,498 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:22:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:59,500 INFO L225 Difference]: With dead ends: 490 [2021-02-19 17:22:59,500 INFO L226 Difference]: Without dead ends: 490 [2021-02-19 17:22:59,500 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:22:59,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-02-19 17:22:59,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 352. [2021-02-19 17:22:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.9458689458689458) internal successors, (1034), 351 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1034 transitions. [2021-02-19 17:22:59,509 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1034 transitions. Word has length 16 [2021-02-19 17:22:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:59,510 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 1034 transitions. [2021-02-19 17:22:59,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:59,510 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1034 transitions. [2021-02-19 17:22:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:22:59,511 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:59,511 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:59,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:59,733 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:22:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash 985842484, now seen corresponding path program 31 times [2021-02-19 17:22:59,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:59,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535551647] [2021-02-19 17:22:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:59,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535551647] [2021-02-19 17:22:59,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881208941] [2021-02-19 17:22:59,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:22:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:59,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:22:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:22:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:22:59,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:22:59,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:22:59,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480787681] [2021-02-19 17:22:59,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:22:59,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:59,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:22:59,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:22:59,827 INFO L87 Difference]: Start difference. First operand 352 states and 1034 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:59,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:59,909 INFO L93 Difference]: Finished difference Result 466 states and 1205 transitions. [2021-02-19 17:22:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:22:59,909 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:22:59,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:59,911 INFO L225 Difference]: With dead ends: 466 [2021-02-19 17:22:59,911 INFO L226 Difference]: Without dead ends: 464 [2021-02-19 17:22:59,911 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:22:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-02-19 17:22:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 360. [2021-02-19 17:22:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.9442896935933147) internal successors, (1057), 359 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1057 transitions. [2021-02-19 17:22:59,920 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1057 transitions. Word has length 16 [2021-02-19 17:22:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:59,920 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1057 transitions. [2021-02-19 17:22:59,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:22:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1057 transitions. [2021-02-19 17:22:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:22:59,921 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:22:59,921 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:00,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-02-19 17:23:00,142 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:00,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:00,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1591375752, now seen corresponding path program 32 times [2021-02-19 17:23:00,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:00,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663393073] [2021-02-19 17:23:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:00,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663393073] [2021-02-19 17:23:00,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886195179] [2021-02-19 17:23:00,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:00,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:00,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:00,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:00,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:00,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:00,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:23:00,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386251871] [2021-02-19 17:23:00,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:23:00,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:00,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:23:00,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:23:00,241 INFO L87 Difference]: Start difference. First operand 360 states and 1057 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:00,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:00,288 INFO L93 Difference]: Finished difference Result 501 states and 1267 transitions. [2021-02-19 17:23:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:23:00,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:00,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:00,291 INFO L225 Difference]: With dead ends: 501 [2021-02-19 17:23:00,291 INFO L226 Difference]: Without dead ends: 501 [2021-02-19 17:23:00,291 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-02-19 17:23:00,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 362. [2021-02-19 17:23:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9445983379501386) internal successors, (1063), 361 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1063 transitions. [2021-02-19 17:23:00,301 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1063 transitions. Word has length 16 [2021-02-19 17:23:00,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:00,301 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 1063 transitions. [2021-02-19 17:23:00,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:00,301 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1063 transitions. [2021-02-19 17:23:00,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:00,302 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:00,302 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:00,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:00,518 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:00,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:00,518 INFO L82 PathProgramCache]: Analyzing trace with hash 974544210, now seen corresponding path program 33 times [2021-02-19 17:23:00,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:00,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945196205] [2021-02-19 17:23:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:00,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945196205] [2021-02-19 17:23:00,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901283128] [2021-02-19 17:23:00,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:00,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:23:00,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:00,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:00,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:00,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:00,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-02-19 17:23:00,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193371773] [2021-02-19 17:23:00,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:23:00,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:00,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:23:00,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:00,631 INFO L87 Difference]: Start difference. First operand 362 states and 1063 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:00,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:00,702 INFO L93 Difference]: Finished difference Result 535 states and 1337 transitions. [2021-02-19 17:23:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:23:00,702 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:00,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:00,704 INFO L225 Difference]: With dead ends: 535 [2021-02-19 17:23:00,704 INFO L226 Difference]: Without dead ends: 535 [2021-02-19 17:23:00,704 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:00,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-02-19 17:23:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 337. [2021-02-19 17:23:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.8988095238095237) internal successors, (974), 336 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 974 transitions. [2021-02-19 17:23:00,713 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 974 transitions. Word has length 16 [2021-02-19 17:23:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:00,713 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 974 transitions. [2021-02-19 17:23:00,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:00,713 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 974 transitions. [2021-02-19 17:23:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:00,714 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:00,714 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:00,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-02-19 17:23:00,914 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1614688454, now seen corresponding path program 34 times [2021-02-19 17:23:00,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:00,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621809864] [2021-02-19 17:23:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:00,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621809864] [2021-02-19 17:23:00,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964828364] [2021-02-19 17:23:00,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:00,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:00,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:00,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:00,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:01,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:01,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:23:01,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851731120] [2021-02-19 17:23:01,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:23:01,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:01,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:23:01,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:23:01,010 INFO L87 Difference]: Start difference. First operand 337 states and 974 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:01,090 INFO L93 Difference]: Finished difference Result 456 states and 1159 transitions. [2021-02-19 17:23:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:01,090 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:01,092 INFO L225 Difference]: With dead ends: 456 [2021-02-19 17:23:01,092 INFO L226 Difference]: Without dead ends: 454 [2021-02-19 17:23:01,092 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:01,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-02-19 17:23:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 348. [2021-02-19 17:23:01,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.893371757925072) internal successors, (1004), 347 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:01,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1004 transitions. [2021-02-19 17:23:01,101 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1004 transitions. Word has length 16 [2021-02-19 17:23:01,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:01,101 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 1004 transitions. [2021-02-19 17:23:01,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1004 transitions. [2021-02-19 17:23:01,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:01,102 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:01,102 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:01,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:01,322 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:01,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:01,322 INFO L82 PathProgramCache]: Analyzing trace with hash -962529782, now seen corresponding path program 35 times [2021-02-19 17:23:01,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:01,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946210947] [2021-02-19 17:23:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:01,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946210947] [2021-02-19 17:23:01,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744680905] [2021-02-19 17:23:01,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:01,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:23:01,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:01,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:01,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:01,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:01,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:23:01,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984526387] [2021-02-19 17:23:01,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:23:01,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:01,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:23:01,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:23:01,411 INFO L87 Difference]: Start difference. First operand 348 states and 1004 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:01,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:01,448 INFO L93 Difference]: Finished difference Result 447 states and 1123 transitions. [2021-02-19 17:23:01,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:23:01,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:01,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:01,450 INFO L225 Difference]: With dead ends: 447 [2021-02-19 17:23:01,450 INFO L226 Difference]: Without dead ends: 447 [2021-02-19 17:23:01,450 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:01,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-02-19 17:23:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 336. [2021-02-19 17:23:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.8656716417910446) internal successors, (960), 335 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 960 transitions. [2021-02-19 17:23:01,458 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 960 transitions. Word has length 16 [2021-02-19 17:23:01,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:01,458 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 960 transitions. [2021-02-19 17:23:01,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:01,458 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 960 transitions. [2021-02-19 17:23:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:01,459 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:01,459 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:01,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-02-19 17:23:01,674 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:01,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:01,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1603390180, now seen corresponding path program 36 times [2021-02-19 17:23:01,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:01,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668836650] [2021-02-19 17:23:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:01,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668836650] [2021-02-19 17:23:01,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55392579] [2021-02-19 17:23:01,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:01,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:23:01,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:01,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:01,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:01,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:01,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:23:01,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553792194] [2021-02-19 17:23:01,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:23:01,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:01,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:23:01,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:01,782 INFO L87 Difference]: Start difference. First operand 336 states and 960 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:01,849 INFO L93 Difference]: Finished difference Result 482 states and 1184 transitions. [2021-02-19 17:23:01,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:23:01,849 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:01,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:01,851 INFO L225 Difference]: With dead ends: 482 [2021-02-19 17:23:01,851 INFO L226 Difference]: Without dead ends: 482 [2021-02-19 17:23:01,851 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:01,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-02-19 17:23:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 310. [2021-02-19 17:23:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.822006472491909) internal successors, (872), 309 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 872 transitions. [2021-02-19 17:23:01,859 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 872 transitions. Word has length 16 [2021-02-19 17:23:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:01,859 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 872 transitions. [2021-02-19 17:23:01,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 872 transitions. [2021-02-19 17:23:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:01,860 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:01,860 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:02,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-02-19 17:23:02,081 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:02,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:02,082 INFO L82 PathProgramCache]: Analyzing trace with hash -457469622, now seen corresponding path program 37 times [2021-02-19 17:23:02,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:02,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517721694] [2021-02-19 17:23:02,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:02,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517721694] [2021-02-19 17:23:02,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180673023] [2021-02-19 17:23:02,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:02,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:02,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:02,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:02,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:23:02,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698667354] [2021-02-19 17:23:02,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:23:02,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:02,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:23:02,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:02,193 INFO L87 Difference]: Start difference. First operand 310 states and 872 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:02,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:02,274 INFO L93 Difference]: Finished difference Result 536 states and 1380 transitions. [2021-02-19 17:23:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:23:02,275 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:02,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:02,276 INFO L225 Difference]: With dead ends: 536 [2021-02-19 17:23:02,276 INFO L226 Difference]: Without dead ends: 536 [2021-02-19 17:23:02,277 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-02-19 17:23:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 382. [2021-02-19 17:23:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.9448818897637796) internal successors, (1122), 381 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:02,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1122 transitions. [2021-02-19 17:23:02,285 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1122 transitions. Word has length 16 [2021-02-19 17:23:02,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:02,285 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1122 transitions. [2021-02-19 17:23:02,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:02,285 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1122 transitions. [2021-02-19 17:23:02,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:02,286 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:02,286 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:02,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:02,507 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:02,507 INFO L82 PathProgramCache]: Analyzing trace with hash -47185774, now seen corresponding path program 38 times [2021-02-19 17:23:02,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:02,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806738808] [2021-02-19 17:23:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:02,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806738808] [2021-02-19 17:23:02,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904507086] [2021-02-19 17:23:02,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:02,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:02,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:02,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:02,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:02,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:02,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:23:02,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686884640] [2021-02-19 17:23:02,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:23:02,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:02,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:23:02,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:23:02,601 INFO L87 Difference]: Start difference. First operand 382 states and 1122 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:02,703 INFO L93 Difference]: Finished difference Result 493 states and 1315 transitions. [2021-02-19 17:23:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:02,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:02,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:02,706 INFO L225 Difference]: With dead ends: 493 [2021-02-19 17:23:02,706 INFO L226 Difference]: Without dead ends: 489 [2021-02-19 17:23:02,706 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-02-19 17:23:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 406. [2021-02-19 17:23:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.9703703703703703) internal successors, (1203), 405 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1203 transitions. [2021-02-19 17:23:02,713 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1203 transitions. Word has length 16 [2021-02-19 17:23:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:02,713 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 1203 transitions. [2021-02-19 17:23:02,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1203 transitions. [2021-02-19 17:23:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:02,714 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:02,714 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:02,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-02-19 17:23:02,928 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:02,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:02,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1931734766, now seen corresponding path program 39 times [2021-02-19 17:23:02,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:02,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125379229] [2021-02-19 17:23:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:02,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125379229] [2021-02-19 17:23:02,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989482934] [2021-02-19 17:23:02,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:02,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:23:02,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:02,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:02,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:03,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:03,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:23:03,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683267376] [2021-02-19 17:23:03,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:23:03,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:03,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:23:03,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:03,027 INFO L87 Difference]: Start difference. First operand 406 states and 1203 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:03,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:03,126 INFO L93 Difference]: Finished difference Result 566 states and 1493 transitions. [2021-02-19 17:23:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:23:03,126 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:03,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:03,128 INFO L225 Difference]: With dead ends: 566 [2021-02-19 17:23:03,128 INFO L226 Difference]: Without dead ends: 566 [2021-02-19 17:23:03,128 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-02-19 17:23:03,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 372. [2021-02-19 17:23:03,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.91644204851752) internal successors, (1082), 371 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1082 transitions. [2021-02-19 17:23:03,136 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1082 transitions. Word has length 16 [2021-02-19 17:23:03,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:03,136 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 1082 transitions. [2021-02-19 17:23:03,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:03,136 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1082 transitions. [2021-02-19 17:23:03,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:03,137 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:03,137 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:03,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:03,350 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash -365922956, now seen corresponding path program 40 times [2021-02-19 17:23:03,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:03,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406475839] [2021-02-19 17:23:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:03,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406475839] [2021-02-19 17:23:03,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703510757] [2021-02-19 17:23:03,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:03,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:03,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:03,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:03,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:03,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:03,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:23:03,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123067751] [2021-02-19 17:23:03,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:23:03,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:03,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:23:03,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:23:03,462 INFO L87 Difference]: Start difference. First operand 372 states and 1082 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:03,547 INFO L93 Difference]: Finished difference Result 471 states and 1219 transitions. [2021-02-19 17:23:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:03,548 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:03,550 INFO L225 Difference]: With dead ends: 471 [2021-02-19 17:23:03,550 INFO L226 Difference]: Without dead ends: 467 [2021-02-19 17:23:03,550 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-02-19 17:23:03,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 379. [2021-02-19 17:23:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.9153439153439153) internal successors, (1102), 378 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1102 transitions. [2021-02-19 17:23:03,557 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1102 transitions. Word has length 16 [2021-02-19 17:23:03,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:03,557 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 1102 transitions. [2021-02-19 17:23:03,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:03,557 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1102 transitions. [2021-02-19 17:23:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:03,558 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:03,558 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:03,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:03,779 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:03,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1351826104, now seen corresponding path program 41 times [2021-02-19 17:23:03,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:03,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738391174] [2021-02-19 17:23:03,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:03,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738391174] [2021-02-19 17:23:03,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94785764] [2021-02-19 17:23:03,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:03,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:23:03,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:03,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:03,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:03,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:03,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:23:03,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292088442] [2021-02-19 17:23:03,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:23:03,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:03,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:23:03,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:23:03,873 INFO L87 Difference]: Start difference. First operand 379 states and 1102 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:03,917 INFO L93 Difference]: Finished difference Result 489 states and 1264 transitions. [2021-02-19 17:23:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:23:03,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:03,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:03,918 INFO L225 Difference]: With dead ends: 489 [2021-02-19 17:23:03,918 INFO L226 Difference]: Without dead ends: 489 [2021-02-19 17:23:03,918 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-02-19 17:23:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 380. [2021-02-19 17:23:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.9155672823219) internal successors, (1105), 379 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1105 transitions. [2021-02-19 17:23:03,925 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1105 transitions. Word has length 16 [2021-02-19 17:23:03,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:03,925 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 1105 transitions. [2021-02-19 17:23:03,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1105 transitions. [2021-02-19 17:23:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:03,926 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:03,926 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:04,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:04,146 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:04,146 INFO L82 PathProgramCache]: Analyzing trace with hash -377221230, now seen corresponding path program 42 times [2021-02-19 17:23:04,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:04,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323923249] [2021-02-19 17:23:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:04,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323923249] [2021-02-19 17:23:04,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754610233] [2021-02-19 17:23:04,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:04,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:23:04,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:04,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:04,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:04,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:04,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-02-19 17:23:04,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347719336] [2021-02-19 17:23:04,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:23:04,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:04,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:23:04,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:04,247 INFO L87 Difference]: Start difference. First operand 380 states and 1105 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:04,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:04,292 INFO L93 Difference]: Finished difference Result 456 states and 1186 transitions. [2021-02-19 17:23:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:23:04,292 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:04,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:04,293 INFO L225 Difference]: With dead ends: 456 [2021-02-19 17:23:04,293 INFO L226 Difference]: Without dead ends: 456 [2021-02-19 17:23:04,293 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-02-19 17:23:04,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 359. [2021-02-19 17:23:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.8910614525139664) internal successors, (1035), 358 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:04,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1035 transitions. [2021-02-19 17:23:04,300 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1035 transitions. Word has length 16 [2021-02-19 17:23:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:04,300 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1035 transitions. [2021-02-19 17:23:04,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:04,300 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1035 transitions. [2021-02-19 17:23:04,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:04,301 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:04,301 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:04,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:04,522 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:04,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1856886264, now seen corresponding path program 43 times [2021-02-19 17:23:04,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:04,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511834066] [2021-02-19 17:23:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:04,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511834066] [2021-02-19 17:23:04,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045085476] [2021-02-19 17:23:04,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:04,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:04,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:04,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:04,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-02-19 17:23:04,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799461930] [2021-02-19 17:23:04,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:04,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:04,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:04,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:04,637 INFO L87 Difference]: Start difference. First operand 359 states and 1035 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:04,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:04,732 INFO L93 Difference]: Finished difference Result 466 states and 1194 transitions. [2021-02-19 17:23:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:23:04,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:04,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:04,734 INFO L225 Difference]: With dead ends: 466 [2021-02-19 17:23:04,734 INFO L226 Difference]: Without dead ends: 466 [2021-02-19 17:23:04,734 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:04,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-02-19 17:23:04,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 341. [2021-02-19 17:23:04,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.864705882352941) internal successors, (974), 340 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:04,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 974 transitions. [2021-02-19 17:23:04,743 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 974 transitions. Word has length 16 [2021-02-19 17:23:04,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:04,743 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 974 transitions. [2021-02-19 17:23:04,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:04,743 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 974 transitions. [2021-02-19 17:23:04,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:04,744 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:04,744 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:04,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-02-19 17:23:04,965 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:04,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:04,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1900225454, now seen corresponding path program 44 times [2021-02-19 17:23:04,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:04,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475323795] [2021-02-19 17:23:04,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:05,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475323795] [2021-02-19 17:23:05,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684598196] [2021-02-19 17:23:05,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:05,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:05,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:05,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:05,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:05,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:05,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-02-19 17:23:05,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518873853] [2021-02-19 17:23:05,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:05,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:05,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:05,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:05,079 INFO L87 Difference]: Start difference. First operand 341 states and 974 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:05,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:05,210 INFO L93 Difference]: Finished difference Result 533 states and 1377 transitions. [2021-02-19 17:23:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:23:05,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:05,212 INFO L225 Difference]: With dead ends: 533 [2021-02-19 17:23:05,212 INFO L226 Difference]: Without dead ends: 533 [2021-02-19 17:23:05,212 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:23:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-02-19 17:23:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 403. [2021-02-19 17:23:05,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.9203980099502487) internal successors, (1174), 402 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1174 transitions. [2021-02-19 17:23:05,220 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1174 transitions. Word has length 16 [2021-02-19 17:23:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:05,220 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1174 transitions. [2021-02-19 17:23:05,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1174 transitions. [2021-02-19 17:23:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:05,221 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:05,221 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:05,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:05,434 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:05,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:05,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1495235018, now seen corresponding path program 45 times [2021-02-19 17:23:05,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:05,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418190295] [2021-02-19 17:23:05,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:05,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418190295] [2021-02-19 17:23:05,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902536730] [2021-02-19 17:23:05,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:05,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:23:05,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:05,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:05,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:05,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:05,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-02-19 17:23:05,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688595617] [2021-02-19 17:23:05,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:05,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:05,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:05,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:05,550 INFO L87 Difference]: Start difference. First operand 403 states and 1174 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:05,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:05,695 INFO L93 Difference]: Finished difference Result 489 states and 1285 transitions. [2021-02-19 17:23:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:05,695 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:05,697 INFO L225 Difference]: With dead ends: 489 [2021-02-19 17:23:05,698 INFO L226 Difference]: Without dead ends: 485 [2021-02-19 17:23:05,698 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:05,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-02-19 17:23:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 391. [2021-02-19 17:23:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.9) internal successors, (1131), 390 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1131 transitions. [2021-02-19 17:23:05,705 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1131 transitions. Word has length 16 [2021-02-19 17:23:05,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:05,706 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 1131 transitions. [2021-02-19 17:23:05,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:05,706 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1131 transitions. [2021-02-19 17:23:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:05,707 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:05,707 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:05,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-02-19 17:23:05,922 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:05,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:05,922 INFO L82 PathProgramCache]: Analyzing trace with hash -357804662, now seen corresponding path program 46 times [2021-02-19 17:23:05,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:05,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887696796] [2021-02-19 17:23:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:05,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887696796] [2021-02-19 17:23:05,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037462274] [2021-02-19 17:23:05,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:06,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:06,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:06,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:06,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:06,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:06,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-02-19 17:23:06,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926988944] [2021-02-19 17:23:06,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:06,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:06,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:06,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:06,059 INFO L87 Difference]: Start difference. First operand 391 states and 1131 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:06,246 INFO L93 Difference]: Finished difference Result 523 states and 1384 transitions. [2021-02-19 17:23:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:23:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:06,248 INFO L225 Difference]: With dead ends: 523 [2021-02-19 17:23:06,248 INFO L226 Difference]: Without dead ends: 523 [2021-02-19 17:23:06,248 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:23:06,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-02-19 17:23:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 386. [2021-02-19 17:23:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.8935064935064934) internal successors, (1114), 385 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1114 transitions. [2021-02-19 17:23:06,255 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1114 transitions. Word has length 16 [2021-02-19 17:23:06,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:06,255 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 1114 transitions. [2021-02-19 17:23:06,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:06,256 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1114 transitions. [2021-02-19 17:23:06,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:06,256 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:06,256 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:06,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:06,477 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:06,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:06,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1635334522, now seen corresponding path program 47 times [2021-02-19 17:23:06,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:06,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448858007] [2021-02-19 17:23:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:06,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448858007] [2021-02-19 17:23:06,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843380134] [2021-02-19 17:23:06,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:06,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:23:06,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:06,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:06,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:06,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:06,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-02-19 17:23:06,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724497836] [2021-02-19 17:23:06,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:06,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:06,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:06,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:06,589 INFO L87 Difference]: Start difference. First operand 386 states and 1114 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:06,701 INFO L93 Difference]: Finished difference Result 454 states and 1208 transitions. [2021-02-19 17:23:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:23:06,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:06,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:06,703 INFO L225 Difference]: With dead ends: 454 [2021-02-19 17:23:06,703 INFO L226 Difference]: Without dead ends: 452 [2021-02-19 17:23:06,704 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:23:06,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-02-19 17:23:06,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 395. [2021-02-19 17:23:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.8984771573604062) internal successors, (1142), 394 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1142 transitions. [2021-02-19 17:23:06,710 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1142 transitions. Word has length 16 [2021-02-19 17:23:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:06,710 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 1142 transitions. [2021-02-19 17:23:06,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1142 transitions. [2021-02-19 17:23:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:06,711 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:06,711 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:06,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:06,932 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:06,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:06,932 INFO L82 PathProgramCache]: Analyzing trace with hash 82414538, now seen corresponding path program 48 times [2021-02-19 17:23:06,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:06,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518277716] [2021-02-19 17:23:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:06,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518277716] [2021-02-19 17:23:06,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915152270] [2021-02-19 17:23:06,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:07,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:23:07,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:07,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:07,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:07,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:07,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-02-19 17:23:07,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739095936] [2021-02-19 17:23:07,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:07,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:07,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:07,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:07,042 INFO L87 Difference]: Start difference. First operand 395 states and 1142 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:07,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:07,120 INFO L93 Difference]: Finished difference Result 476 states and 1251 transitions. [2021-02-19 17:23:07,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:07,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:07,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:07,125 INFO L225 Difference]: With dead ends: 476 [2021-02-19 17:23:07,126 INFO L226 Difference]: Without dead ends: 476 [2021-02-19 17:23:07,126 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:23:07,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-02-19 17:23:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 396. [2021-02-19 17:23:07,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.8936708860759492) internal successors, (1143), 395 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1143 transitions. [2021-02-19 17:23:07,133 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1143 transitions. Word has length 16 [2021-02-19 17:23:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:07,133 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 1143 transitions. [2021-02-19 17:23:07,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:07,133 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1143 transitions. [2021-02-19 17:23:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:07,134 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:07,134 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:07,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-02-19 17:23:07,354 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:07,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1646632796, now seen corresponding path program 49 times [2021-02-19 17:23:07,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:07,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684445063] [2021-02-19 17:23:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:07,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684445063] [2021-02-19 17:23:07,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558790369] [2021-02-19 17:23:07,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:07,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:07,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:07,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:07,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-02-19 17:23:07,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432934198] [2021-02-19 17:23:07,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:07,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:07,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:07,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:07,482 INFO L87 Difference]: Start difference. First operand 396 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:07,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:07,575 INFO L93 Difference]: Finished difference Result 482 states and 1265 transitions. [2021-02-19 17:23:07,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:07,576 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:07,577 INFO L225 Difference]: With dead ends: 482 [2021-02-19 17:23:07,577 INFO L226 Difference]: Without dead ends: 482 [2021-02-19 17:23:07,577 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-02-19 17:23:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 397. [2021-02-19 17:23:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.893939393939394) internal successors, (1146), 396 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1146 transitions. [2021-02-19 17:23:07,583 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1146 transitions. Word has length 16 [2021-02-19 17:23:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:07,584 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 1146 transitions. [2021-02-19 17:23:07,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1146 transitions. [2021-02-19 17:23:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:07,584 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:07,584 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:07,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:07,802 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:07,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:07,802 INFO L82 PathProgramCache]: Analyzing trace with hash 587474698, now seen corresponding path program 50 times [2021-02-19 17:23:07,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:07,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743385724] [2021-02-19 17:23:07,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:07,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743385724] [2021-02-19 17:23:07,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326871751] [2021-02-19 17:23:07,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:07,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:07,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:07,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:07,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:07,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:07,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-02-19 17:23:07,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579135740] [2021-02-19 17:23:07,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:07,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:07,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:07,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:07,923 INFO L87 Difference]: Start difference. First operand 397 states and 1146 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:08,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:08,042 INFO L93 Difference]: Finished difference Result 476 states and 1290 transitions. [2021-02-19 17:23:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:23:08,042 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:08,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:08,044 INFO L225 Difference]: With dead ends: 476 [2021-02-19 17:23:08,044 INFO L226 Difference]: Without dead ends: 476 [2021-02-19 17:23:08,044 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:23:08,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-02-19 17:23:08,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 420. [2021-02-19 17:23:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.911694510739857) internal successors, (1220), 419 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1220 transitions. [2021-02-19 17:23:08,050 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1220 transitions. Word has length 16 [2021-02-19 17:23:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:08,050 INFO L480 AbstractCegarLoop]: Abstraction has 420 states and 1220 transitions. [2021-02-19 17:23:08,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:08,050 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1220 transitions. [2021-02-19 17:23:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:08,051 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:08,051 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:08,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-02-19 17:23:08,272 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:08,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:08,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1125330276, now seen corresponding path program 51 times [2021-02-19 17:23:08,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:08,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719700907] [2021-02-19 17:23:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:08,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719700907] [2021-02-19 17:23:08,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108398409] [2021-02-19 17:23:08,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:08,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:23:08,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:08,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:08,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:08,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:08,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-02-19 17:23:08,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200179967] [2021-02-19 17:23:08,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:08,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:08,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:08,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:08,404 INFO L87 Difference]: Start difference. First operand 420 states and 1220 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:08,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:08,554 INFO L93 Difference]: Finished difference Result 486 states and 1311 transitions. [2021-02-19 17:23:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:08,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:08,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:08,556 INFO L225 Difference]: With dead ends: 486 [2021-02-19 17:23:08,556 INFO L226 Difference]: Without dead ends: 486 [2021-02-19 17:23:08,556 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:23:08,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-02-19 17:23:08,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 416. [2021-02-19 17:23:08,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.908433734939759) internal successors, (1207), 415 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1207 transitions. [2021-02-19 17:23:08,561 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1207 transitions. Word has length 16 [2021-02-19 17:23:08,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:08,561 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 1207 transitions. [2021-02-19 17:23:08,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1207 transitions. [2021-02-19 17:23:08,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 17:23:08,562 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:08,562 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:08,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-02-19 17:23:08,774 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:08,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:08,774 INFO L82 PathProgramCache]: Analyzing trace with hash 618984010, now seen corresponding path program 52 times [2021-02-19 17:23:08,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:08,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711026984] [2021-02-19 17:23:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:08,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711026984] [2021-02-19 17:23:08,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781595207] [2021-02-19 17:23:08,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:08,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:08,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:08,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:08,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:08,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:08,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 17:23:08,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402229136] [2021-02-19 17:23:08,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:08,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:08,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:08,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:08,898 INFO L87 Difference]: Start difference. First operand 416 states and 1207 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:09,088 INFO L93 Difference]: Finished difference Result 533 states and 1453 transitions. [2021-02-19 17:23:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:23:09,089 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 17:23:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:09,090 INFO L225 Difference]: With dead ends: 533 [2021-02-19 17:23:09,090 INFO L226 Difference]: Without dead ends: 533 [2021-02-19 17:23:09,090 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:23:09,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-02-19 17:23:09,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 424. [2021-02-19 17:23:09,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.9125295508274234) internal successors, (1232), 423 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:09,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1232 transitions. [2021-02-19 17:23:09,096 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1232 transitions. Word has length 16 [2021-02-19 17:23:09,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:09,096 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 1232 transitions. [2021-02-19 17:23:09,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:09,096 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1232 transitions. [2021-02-19 17:23:09,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:09,097 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:09,097 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:09,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-02-19 17:23:09,310 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:09,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:09,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1360741671, now seen corresponding path program 53 times [2021-02-19 17:23:09,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:09,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044823246] [2021-02-19 17:23:09,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:09,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044823246] [2021-02-19 17:23:09,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031050936] [2021-02-19 17:23:09,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:09,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:23:09,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:09,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:09,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:09,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:09,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-02-19 17:23:09,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97885159] [2021-02-19 17:23:09,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:23:09,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:09,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:23:09,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:09,447 INFO L87 Difference]: Start difference. First operand 424 states and 1232 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:09,561 INFO L93 Difference]: Finished difference Result 523 states and 1364 transitions. [2021-02-19 17:23:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:23:09,562 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:09,563 INFO L225 Difference]: With dead ends: 523 [2021-02-19 17:23:09,563 INFO L226 Difference]: Without dead ends: 517 [2021-02-19 17:23:09,563 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:23:09,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-02-19 17:23:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 417. [2021-02-19 17:23:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.8774038461538463) internal successors, (1197), 416 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:09,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1197 transitions. [2021-02-19 17:23:09,568 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1197 transitions. Word has length 17 [2021-02-19 17:23:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:09,568 INFO L480 AbstractCegarLoop]: Abstraction has 417 states and 1197 transitions. [2021-02-19 17:23:09,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:09,568 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1197 transitions. [2021-02-19 17:23:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:09,569 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:09,569 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:09,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 17:23:09,769 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:09,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1115937199, now seen corresponding path program 54 times [2021-02-19 17:23:09,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:09,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568427256] [2021-02-19 17:23:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:09,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568427256] [2021-02-19 17:23:09,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274422992] [2021-02-19 17:23:09,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:09,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:23:09,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:09,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:09,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:09,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:09,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2021-02-19 17:23:09,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80463745] [2021-02-19 17:23:09,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:23:09,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:09,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:23:09,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:09,862 INFO L87 Difference]: Start difference. First operand 417 states and 1197 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:09,930 INFO L93 Difference]: Finished difference Result 436 states and 1230 transitions. [2021-02-19 17:23:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:09,930 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:09,931 INFO L225 Difference]: With dead ends: 436 [2021-02-19 17:23:09,931 INFO L226 Difference]: Without dead ends: 434 [2021-02-19 17:23:09,932 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-02-19 17:23:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 417. [2021-02-19 17:23:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.8677884615384617) internal successors, (1193), 416 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:09,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1193 transitions. [2021-02-19 17:23:09,936 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1193 transitions. Word has length 17 [2021-02-19 17:23:09,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:09,936 INFO L480 AbstractCegarLoop]: Abstraction has 417 states and 1193 transitions. [2021-02-19 17:23:09,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1193 transitions. [2021-02-19 17:23:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:09,937 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:09,937 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:10,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:10,153 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:10,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:10,153 INFO L82 PathProgramCache]: Analyzing trace with hash 351808069, now seen corresponding path program 55 times [2021-02-19 17:23:10,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:10,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863035866] [2021-02-19 17:23:10,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:10,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863035866] [2021-02-19 17:23:10,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136973271] [2021-02-19 17:23:10,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:10,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 17:23:10,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:10,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:10,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 17:23:10,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219730787] [2021-02-19 17:23:10,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:23:10,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:10,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:23:10,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:23:10,254 INFO L87 Difference]: Start difference. First operand 417 states and 1193 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:10,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:10,295 INFO L93 Difference]: Finished difference Result 505 states and 1323 transitions. [2021-02-19 17:23:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:23:10,296 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:10,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:10,297 INFO L225 Difference]: With dead ends: 505 [2021-02-19 17:23:10,298 INFO L226 Difference]: Without dead ends: 503 [2021-02-19 17:23:10,298 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:10,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-02-19 17:23:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 420. [2021-02-19 17:23:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.863961813842482) internal successors, (1200), 419 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1200 transitions. [2021-02-19 17:23:10,304 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1200 transitions. Word has length 17 [2021-02-19 17:23:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:10,304 INFO L480 AbstractCegarLoop]: Abstraction has 420 states and 1200 transitions. [2021-02-19 17:23:10,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1200 transitions. [2021-02-19 17:23:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:10,305 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:10,305 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:10,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-02-19 17:23:10,505 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:10,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2097262759, now seen corresponding path program 56 times [2021-02-19 17:23:10,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:10,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474363077] [2021-02-19 17:23:10,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:10,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474363077] [2021-02-19 17:23:10,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670358223] [2021-02-19 17:23:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:10,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:10,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:10,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:10,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:10,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:10,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-02-19 17:23:10,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163608158] [2021-02-19 17:23:10,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:23:10,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:10,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:23:10,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:10,628 INFO L87 Difference]: Start difference. First operand 420 states and 1200 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:10,699 INFO L93 Difference]: Finished difference Result 516 states and 1337 transitions. [2021-02-19 17:23:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:23:10,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:10,713 INFO L225 Difference]: With dead ends: 516 [2021-02-19 17:23:10,713 INFO L226 Difference]: Without dead ends: 515 [2021-02-19 17:23:10,713 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-02-19 17:23:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 415. [2021-02-19 17:23:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.845410628019324) internal successors, (1178), 414 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1178 transitions. [2021-02-19 17:23:10,719 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1178 transitions. Word has length 17 [2021-02-19 17:23:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:10,719 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 1178 transitions. [2021-02-19 17:23:10,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1178 transitions. [2021-02-19 17:23:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:10,720 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:10,720 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:10,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:10,930 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:10,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:10,930 INFO L82 PathProgramCache]: Analyzing trace with hash -487091229, now seen corresponding path program 57 times [2021-02-19 17:23:10,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:10,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183728766] [2021-02-19 17:23:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:10,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183728766] [2021-02-19 17:23:10,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218497371] [2021-02-19 17:23:10,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:10,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:23:10,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:10,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 17:23:10,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:11,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:11,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:23:11,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962454129] [2021-02-19 17:23:11,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:23:11,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:11,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:23:11,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:11,018 INFO L87 Difference]: Start difference. First operand 415 states and 1178 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:11,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:11,109 INFO L93 Difference]: Finished difference Result 503 states and 1301 transitions. [2021-02-19 17:23:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:23:11,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:11,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:11,110 INFO L225 Difference]: With dead ends: 503 [2021-02-19 17:23:11,110 INFO L226 Difference]: Without dead ends: 500 [2021-02-19 17:23:11,111 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:11,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-02-19 17:23:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 412. [2021-02-19 17:23:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.834549878345499) internal successors, (1165), 411 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1165 transitions. [2021-02-19 17:23:11,117 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1165 transitions. Word has length 17 [2021-02-19 17:23:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:11,117 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 1165 transitions. [2021-02-19 17:23:11,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:11,117 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1165 transitions. [2021-02-19 17:23:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:11,118 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:11,118 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:11,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-02-19 17:23:11,334 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:11,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:11,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1002313767, now seen corresponding path program 58 times [2021-02-19 17:23:11,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:11,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075002158] [2021-02-19 17:23:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:11,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075002158] [2021-02-19 17:23:11,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708213960] [2021-02-19 17:23:11,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:11,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:11,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:11,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:11,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:11,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:11,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-02-19 17:23:11,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506309077] [2021-02-19 17:23:11,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:11,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:11,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:11,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:11,440 INFO L87 Difference]: Start difference. First operand 412 states and 1165 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:11,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:11,561 INFO L93 Difference]: Finished difference Result 478 states and 1266 transitions. [2021-02-19 17:23:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:23:11,562 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:11,563 INFO L225 Difference]: With dead ends: 478 [2021-02-19 17:23:11,563 INFO L226 Difference]: Without dead ends: 474 [2021-02-19 17:23:11,563 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-02-19 17:23:11,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 412. [2021-02-19 17:23:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.8223844282238444) internal successors, (1160), 411 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:11,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1160 transitions. [2021-02-19 17:23:11,570 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1160 transitions. Word has length 17 [2021-02-19 17:23:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:11,571 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 1160 transitions. [2021-02-19 17:23:11,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1160 transitions. [2021-02-19 17:23:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:11,571 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:11,571 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:11,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:11,793 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:11,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:11,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1628803341, now seen corresponding path program 59 times [2021-02-19 17:23:11,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:11,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20241494] [2021-02-19 17:23:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:11,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20241494] [2021-02-19 17:23:11,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657791956] [2021-02-19 17:23:11,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:11,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:23:11,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:11,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:11,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:11,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:11,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-02-19 17:23:11,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236573569] [2021-02-19 17:23:11,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:23:11,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:11,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:23:11,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:11,892 INFO L87 Difference]: Start difference. First operand 412 states and 1160 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:11,936 INFO L93 Difference]: Finished difference Result 508 states and 1297 transitions. [2021-02-19 17:23:11,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:23:11,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:11,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:11,937 INFO L225 Difference]: With dead ends: 508 [2021-02-19 17:23:11,937 INFO L226 Difference]: Without dead ends: 506 [2021-02-19 17:23:11,937 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:11,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-02-19 17:23:11,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 409. [2021-02-19 17:23:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.7965686274509802) internal successors, (1141), 408 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1141 transitions. [2021-02-19 17:23:11,941 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1141 transitions. Word has length 17 [2021-02-19 17:23:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:11,941 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 1141 transitions. [2021-02-19 17:23:11,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1141 transitions. [2021-02-19 17:23:11,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:11,942 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:11,942 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:12,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-02-19 17:23:12,146 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:12,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:12,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1827264657, now seen corresponding path program 60 times [2021-02-19 17:23:12,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:12,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832437924] [2021-02-19 17:23:12,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:12,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832437924] [2021-02-19 17:23:12,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867771654] [2021-02-19 17:23:12,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:12,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:23:12,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:12,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:12,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:12,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2021-02-19 17:23:12,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049672199] [2021-02-19 17:23:12,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:23:12,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:12,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:23:12,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:12,243 INFO L87 Difference]: Start difference. First operand 409 states and 1141 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:12,330 INFO L93 Difference]: Finished difference Result 497 states and 1266 transitions. [2021-02-19 17:23:12,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:12,331 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:12,331 INFO L225 Difference]: With dead ends: 497 [2021-02-19 17:23:12,332 INFO L226 Difference]: Without dead ends: 494 [2021-02-19 17:23:12,332 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-02-19 17:23:12,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 403. [2021-02-19 17:23:12,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.7761194029850746) internal successors, (1116), 402 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:12,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1116 transitions. [2021-02-19 17:23:12,339 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1116 transitions. Word has length 17 [2021-02-19 17:23:12,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:12,339 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1116 transitions. [2021-02-19 17:23:12,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:12,339 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1116 transitions. [2021-02-19 17:23:12,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:12,340 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:12,340 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:12,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:12,561 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash -978297643, now seen corresponding path program 61 times [2021-02-19 17:23:12,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:12,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175160400] [2021-02-19 17:23:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:12,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175160400] [2021-02-19 17:23:12,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498136390] [2021-02-19 17:23:12,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:12,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:12,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:12,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-02-19 17:23:12,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233329194] [2021-02-19 17:23:12,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:12,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:12,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:12,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:12,672 INFO L87 Difference]: Start difference. First operand 403 states and 1116 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:12,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:12,779 INFO L93 Difference]: Finished difference Result 496 states and 1249 transitions. [2021-02-19 17:23:12,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:23:12,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:12,780 INFO L225 Difference]: With dead ends: 496 [2021-02-19 17:23:12,780 INFO L226 Difference]: Without dead ends: 492 [2021-02-19 17:23:12,780 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:23:12,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-02-19 17:23:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 403. [2021-02-19 17:23:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.756218905472637) internal successors, (1108), 402 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:12,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1108 transitions. [2021-02-19 17:23:12,787 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1108 transitions. Word has length 17 [2021-02-19 17:23:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:12,787 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1108 transitions. [2021-02-19 17:23:12,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:12,787 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1108 transitions. [2021-02-19 17:23:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:12,788 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:12,788 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:13,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-02-19 17:23:13,008 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:13,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2051383023, now seen corresponding path program 62 times [2021-02-19 17:23:13,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:13,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636388187] [2021-02-19 17:23:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:13,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636388187] [2021-02-19 17:23:13,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309490629] [2021-02-19 17:23:13,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:13,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:13,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:13,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:13,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:13,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-02-19 17:23:13,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681645713] [2021-02-19 17:23:13,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:13,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:13,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:13,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:13,124 INFO L87 Difference]: Start difference. First operand 403 states and 1108 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:13,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:13,231 INFO L93 Difference]: Finished difference Result 492 states and 1286 transitions. [2021-02-19 17:23:13,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:13,231 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:13,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:13,232 INFO L225 Difference]: With dead ends: 492 [2021-02-19 17:23:13,232 INFO L226 Difference]: Without dead ends: 486 [2021-02-19 17:23:13,232 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:23:13,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-02-19 17:23:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 404. [2021-02-19 17:23:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.7468982630272953) internal successors, (1107), 403 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:13,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1107 transitions. [2021-02-19 17:23:13,238 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1107 transitions. Word has length 17 [2021-02-19 17:23:13,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:13,238 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 1107 transitions. [2021-02-19 17:23:13,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1107 transitions. [2021-02-19 17:23:13,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:13,239 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:13,239 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:13,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:13,458 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:13,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:13,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1954266215, now seen corresponding path program 63 times [2021-02-19 17:23:13,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:13,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847503263] [2021-02-19 17:23:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:13,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847503263] [2021-02-19 17:23:13,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415855134] [2021-02-19 17:23:13,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:13,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:23:13,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:13,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 17:23:13,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:13,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:13,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:23:13,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068481337] [2021-02-19 17:23:13,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:23:13,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:13,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:23:13,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:13,572 INFO L87 Difference]: Start difference. First operand 404 states and 1107 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:13,645 INFO L93 Difference]: Finished difference Result 476 states and 1226 transitions. [2021-02-19 17:23:13,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:23:13,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:13,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:13,646 INFO L225 Difference]: With dead ends: 476 [2021-02-19 17:23:13,646 INFO L226 Difference]: Without dead ends: 476 [2021-02-19 17:23:13,646 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-02-19 17:23:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 405. [2021-02-19 17:23:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.7475247524752477) internal successors, (1110), 404 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1110 transitions. [2021-02-19 17:23:13,652 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1110 transitions. Word has length 17 [2021-02-19 17:23:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:13,653 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 1110 transitions. [2021-02-19 17:23:13,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1110 transitions. [2021-02-19 17:23:13,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:13,653 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:13,653 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:13,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-02-19 17:23:13,874 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:13,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:13,874 INFO L82 PathProgramCache]: Analyzing trace with hash -508962231, now seen corresponding path program 64 times [2021-02-19 17:23:13,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:13,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420503164] [2021-02-19 17:23:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:13,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420503164] [2021-02-19 17:23:13,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995671634] [2021-02-19 17:23:13,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:13,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:13,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:13,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:13,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:13,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:13,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-02-19 17:23:13,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22281043] [2021-02-19 17:23:13,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:13,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:13,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:13,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:13,979 INFO L87 Difference]: Start difference. First operand 405 states and 1110 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:14,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:14,081 INFO L93 Difference]: Finished difference Result 496 states and 1283 transitions. [2021-02-19 17:23:14,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:14,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:14,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:14,083 INFO L225 Difference]: With dead ends: 496 [2021-02-19 17:23:14,083 INFO L226 Difference]: Without dead ends: 490 [2021-02-19 17:23:14,083 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:23:14,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-02-19 17:23:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 405. [2021-02-19 17:23:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.735148514851485) internal successors, (1105), 404 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:14,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1105 transitions. [2021-02-19 17:23:14,089 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1105 transitions. Word has length 17 [2021-02-19 17:23:14,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:14,089 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 1105 transitions. [2021-02-19 17:23:14,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1105 transitions. [2021-02-19 17:23:14,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:14,090 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:14,090 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:14,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-02-19 17:23:14,303 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:14,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:14,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1396752389, now seen corresponding path program 65 times [2021-02-19 17:23:14,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:14,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695624459] [2021-02-19 17:23:14,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:14,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695624459] [2021-02-19 17:23:14,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170152430] [2021-02-19 17:23:14,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:14,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:23:14,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:14,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:14,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:14,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:14,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-02-19 17:23:14,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250077183] [2021-02-19 17:23:14,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:23:14,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:23:14,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:14,402 INFO L87 Difference]: Start difference. First operand 405 states and 1105 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:14,453 INFO L93 Difference]: Finished difference Result 538 states and 1315 transitions. [2021-02-19 17:23:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:23:14,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:14,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:14,455 INFO L225 Difference]: With dead ends: 538 [2021-02-19 17:23:14,455 INFO L226 Difference]: Without dead ends: 538 [2021-02-19 17:23:14,455 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-02-19 17:23:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 410. [2021-02-19 17:23:14,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.743276283618582) internal successors, (1122), 409 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1122 transitions. [2021-02-19 17:23:14,460 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1122 transitions. Word has length 17 [2021-02-19 17:23:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:14,460 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 1122 transitions. [2021-02-19 17:23:14,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1122 transitions. [2021-02-19 17:23:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:14,461 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:14,461 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:14,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-02-19 17:23:14,662 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:14,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:14,662 INFO L82 PathProgramCache]: Analyzing trace with hash 557853091, now seen corresponding path program 66 times [2021-02-19 17:23:14,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:14,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168313394] [2021-02-19 17:23:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:14,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168313394] [2021-02-19 17:23:14,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779670875] [2021-02-19 17:23:14,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:14,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:23:14,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:14,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:14,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:14,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:14,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2021-02-19 17:23:14,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073588272] [2021-02-19 17:23:14,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:23:14,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:14,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:23:14,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:14,768 INFO L87 Difference]: Start difference. First operand 410 states and 1122 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:14,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:14,846 INFO L93 Difference]: Finished difference Result 512 states and 1266 transitions. [2021-02-19 17:23:14,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:14,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:14,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:14,847 INFO L225 Difference]: With dead ends: 512 [2021-02-19 17:23:14,847 INFO L226 Difference]: Without dead ends: 510 [2021-02-19 17:23:14,847 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-02-19 17:23:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 410. [2021-02-19 17:23:14,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.7310513447432765) internal successors, (1117), 409 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1117 transitions. [2021-02-19 17:23:14,851 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1117 transitions. Word has length 17 [2021-02-19 17:23:14,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:14,851 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 1117 transitions. [2021-02-19 17:23:14,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1117 transitions. [2021-02-19 17:23:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:14,853 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:14,853 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:15,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:15,053 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:15,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:15,054 INFO L82 PathProgramCache]: Analyzing trace with hash 2047258087, now seen corresponding path program 67 times [2021-02-19 17:23:15,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:15,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781218598] [2021-02-19 17:23:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:15,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781218598] [2021-02-19 17:23:15,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016282849] [2021-02-19 17:23:15,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:15,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:15,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:15,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:15,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-02-19 17:23:15,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057912041] [2021-02-19 17:23:15,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:15,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:15,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:15,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:15,188 INFO L87 Difference]: Start difference. First operand 410 states and 1117 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:15,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:15,291 INFO L93 Difference]: Finished difference Result 518 states and 1269 transitions. [2021-02-19 17:23:15,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:23:15,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:15,292 INFO L225 Difference]: With dead ends: 518 [2021-02-19 17:23:15,292 INFO L226 Difference]: Without dead ends: 514 [2021-02-19 17:23:15,292 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:23:15,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-02-19 17:23:15,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 410. [2021-02-19 17:23:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.7163814180929093) internal successors, (1111), 409 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1111 transitions. [2021-02-19 17:23:15,299 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1111 transitions. Word has length 17 [2021-02-19 17:23:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:15,299 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 1111 transitions. [2021-02-19 17:23:15,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1111 transitions. [2021-02-19 17:23:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:15,300 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:15,300 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:15,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-02-19 17:23:15,518 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:15,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:15,518 INFO L82 PathProgramCache]: Analyzing trace with hash 974172707, now seen corresponding path program 68 times [2021-02-19 17:23:15,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:15,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80514185] [2021-02-19 17:23:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:15,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80514185] [2021-02-19 17:23:15,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508833685] [2021-02-19 17:23:15,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:15,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:15,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:15,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:15,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:15,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:15,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-02-19 17:23:15,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445197706] [2021-02-19 17:23:15,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:15,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:15,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:15,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:15,632 INFO L87 Difference]: Start difference. First operand 410 states and 1111 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:15,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:15,730 INFO L93 Difference]: Finished difference Result 523 states and 1270 transitions. [2021-02-19 17:23:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:23:15,730 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:15,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:15,731 INFO L225 Difference]: With dead ends: 523 [2021-02-19 17:23:15,731 INFO L226 Difference]: Without dead ends: 517 [2021-02-19 17:23:15,731 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-02-19 17:23:15,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 411. [2021-02-19 17:23:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.7) internal successors, (1107), 410 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:15,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1107 transitions. [2021-02-19 17:23:15,737 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1107 transitions. Word has length 17 [2021-02-19 17:23:15,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:15,737 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 1107 transitions. [2021-02-19 17:23:15,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1107 transitions. [2021-02-19 17:23:15,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:15,738 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:15,738 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:15,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-02-19 17:23:15,958 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:15,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:15,959 INFO L82 PathProgramCache]: Analyzing trace with hash 2068264295, now seen corresponding path program 69 times [2021-02-19 17:23:15,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:15,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389293341] [2021-02-19 17:23:15,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:16,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389293341] [2021-02-19 17:23:16,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221663759] [2021-02-19 17:23:16,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:16,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:23:16,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:16,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 17:23:16,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:16,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:16,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-02-19 17:23:16,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88919773] [2021-02-19 17:23:16,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:16,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:16,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:16,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:16,073 INFO L87 Difference]: Start difference. First operand 411 states and 1107 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:16,184 INFO L93 Difference]: Finished difference Result 574 states and 1445 transitions. [2021-02-19 17:23:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:23:16,184 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:16,185 INFO L225 Difference]: With dead ends: 574 [2021-02-19 17:23:16,185 INFO L226 Difference]: Without dead ends: 566 [2021-02-19 17:23:16,185 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:23:16,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-02-19 17:23:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 420. [2021-02-19 17:23:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.6801909307875893) internal successors, (1123), 419 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1123 transitions. [2021-02-19 17:23:16,192 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1123 transitions. Word has length 17 [2021-02-19 17:23:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:16,192 INFO L480 AbstractCegarLoop]: Abstraction has 420 states and 1123 transitions. [2021-02-19 17:23:16,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1123 transitions. [2021-02-19 17:23:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:16,192 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:16,193 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:16,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-02-19 17:23:16,413 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:16,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:16,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1770296785, now seen corresponding path program 70 times [2021-02-19 17:23:16,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:16,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134579559] [2021-02-19 17:23:16,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:16,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134579559] [2021-02-19 17:23:16,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262312167] [2021-02-19 17:23:16,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:16,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:16,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:16,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 17:23:16,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:16,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:16,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-02-19 17:23:16,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574175330] [2021-02-19 17:23:16,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:16,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:16,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:16,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:16,542 INFO L87 Difference]: Start difference. First operand 420 states and 1123 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:16,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:16,647 INFO L93 Difference]: Finished difference Result 565 states and 1384 transitions. [2021-02-19 17:23:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:23:16,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:16,648 INFO L225 Difference]: With dead ends: 565 [2021-02-19 17:23:16,648 INFO L226 Difference]: Without dead ends: 565 [2021-02-19 17:23:16,649 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-02-19 17:23:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 444. [2021-02-19 17:23:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.724604966139955) internal successors, (1207), 443 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:16,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1207 transitions. [2021-02-19 17:23:16,661 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1207 transitions. Word has length 17 [2021-02-19 17:23:16,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:16,661 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1207 transitions. [2021-02-19 17:23:16,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1207 transitions. [2021-02-19 17:23:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:16,662 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:16,662 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:16,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:16,883 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:16,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:16,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1656298705, now seen corresponding path program 71 times [2021-02-19 17:23:16,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:16,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045859100] [2021-02-19 17:23:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:16,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045859100] [2021-02-19 17:23:16,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390436927] [2021-02-19 17:23:16,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:16,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:23:16,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:16,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:16,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:16,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:16,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-02-19 17:23:16,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9855624] [2021-02-19 17:23:16,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:16,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:16,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:16,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:16,992 INFO L87 Difference]: Start difference. First operand 444 states and 1207 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:17,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:17,091 INFO L93 Difference]: Finished difference Result 566 states and 1444 transitions. [2021-02-19 17:23:17,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:23:17,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:17,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:17,092 INFO L225 Difference]: With dead ends: 566 [2021-02-19 17:23:17,092 INFO L226 Difference]: Without dead ends: 558 [2021-02-19 17:23:17,092 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:23:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-02-19 17:23:17,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 444. [2021-02-19 17:23:17,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.7200902934537248) internal successors, (1205), 443 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1205 transitions. [2021-02-19 17:23:17,097 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1205 transitions. Word has length 17 [2021-02-19 17:23:17,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:17,097 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1205 transitions. [2021-02-19 17:23:17,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:17,097 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1205 transitions. [2021-02-19 17:23:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:17,098 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:17,098 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:17,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:17,298 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:17,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:17,299 INFO L82 PathProgramCache]: Analyzing trace with hash 699699507, now seen corresponding path program 72 times [2021-02-19 17:23:17,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:17,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760878757] [2021-02-19 17:23:17,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:17,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760878757] [2021-02-19 17:23:17,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708483353] [2021-02-19 17:23:17,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:17,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:23:17,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:17,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:17,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:17,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:17,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2021-02-19 17:23:17,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990774091] [2021-02-19 17:23:17,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:17,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:17,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:17,429 INFO L87 Difference]: Start difference. First operand 444 states and 1205 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:17,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:17,495 INFO L93 Difference]: Finished difference Result 642 states and 1598 transitions. [2021-02-19 17:23:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:23:17,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:17,496 INFO L225 Difference]: With dead ends: 642 [2021-02-19 17:23:17,496 INFO L226 Difference]: Without dead ends: 642 [2021-02-19 17:23:17,496 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-02-19 17:23:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 497. [2021-02-19 17:23:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.788306451612903) internal successors, (1383), 496 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:17,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1383 transitions. [2021-02-19 17:23:17,501 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1383 transitions. Word has length 17 [2021-02-19 17:23:17,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:17,501 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1383 transitions. [2021-02-19 17:23:17,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:17,501 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1383 transitions. [2021-02-19 17:23:17,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:17,502 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:17,502 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:17,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:17,702 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:17,703 INFO L82 PathProgramCache]: Analyzing trace with hash -139199791, now seen corresponding path program 73 times [2021-02-19 17:23:17,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:17,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886464314] [2021-02-19 17:23:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:17,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886464314] [2021-02-19 17:23:17,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104307647] [2021-02-19 17:23:17,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:17,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:17,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:17,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:17,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-02-19 17:23:17,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066786039] [2021-02-19 17:23:17,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:17,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:17,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:17,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:17,813 INFO L87 Difference]: Start difference. First operand 497 states and 1383 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:17,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:17,911 INFO L93 Difference]: Finished difference Result 618 states and 1566 transitions. [2021-02-19 17:23:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:23:17,911 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:17,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:17,912 INFO L225 Difference]: With dead ends: 618 [2021-02-19 17:23:17,912 INFO L226 Difference]: Without dead ends: 616 [2021-02-19 17:23:17,913 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:23:17,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-02-19 17:23:17,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 497. [2021-02-19 17:23:17,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.784274193548387) internal successors, (1381), 496 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:17,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1381 transitions. [2021-02-19 17:23:17,920 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1381 transitions. Word has length 17 [2021-02-19 17:23:17,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:17,920 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1381 transitions. [2021-02-19 17:23:17,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:17,920 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1381 transitions. [2021-02-19 17:23:17,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:17,921 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:17,921 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:18,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-02-19 17:23:18,142 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:18,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:18,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1350205205, now seen corresponding path program 74 times [2021-02-19 17:23:18,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:18,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461706965] [2021-02-19 17:23:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:18,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461706965] [2021-02-19 17:23:18,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669837687] [2021-02-19 17:23:18,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:18,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:18,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:18,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:18,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:18,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:18,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-02-19 17:23:18,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19800697] [2021-02-19 17:23:18,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:18,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:18,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:18,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:18,248 INFO L87 Difference]: Start difference. First operand 497 states and 1381 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:18,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:18,347 INFO L93 Difference]: Finished difference Result 624 states and 1572 transitions. [2021-02-19 17:23:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:23:18,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:18,348 INFO L225 Difference]: With dead ends: 624 [2021-02-19 17:23:18,348 INFO L226 Difference]: Without dead ends: 620 [2021-02-19 17:23:18,348 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-02-19 17:23:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 502. [2021-02-19 17:23:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7864271457085827) internal successors, (1396), 501 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1396 transitions. [2021-02-19 17:23:18,354 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1396 transitions. Word has length 17 [2021-02-19 17:23:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:18,354 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 1396 transitions. [2021-02-19 17:23:18,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1396 transitions. [2021-02-19 17:23:18,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:18,354 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:18,354 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:18,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-02-19 17:23:18,562 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:18,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:18,562 INFO L82 PathProgramCache]: Analyzing trace with hash 277119825, now seen corresponding path program 75 times [2021-02-19 17:23:18,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:18,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825496720] [2021-02-19 17:23:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:18,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825496720] [2021-02-19 17:23:18,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842684314] [2021-02-19 17:23:18,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:18,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:23:18,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:18,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:18,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:18,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:18,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-02-19 17:23:18,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650999137] [2021-02-19 17:23:18,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:18,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:18,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:18,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:18,697 INFO L87 Difference]: Start difference. First operand 502 states and 1396 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:18,802 INFO L93 Difference]: Finished difference Result 723 states and 1870 transitions. [2021-02-19 17:23:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:23:18,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:18,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:18,804 INFO L225 Difference]: With dead ends: 723 [2021-02-19 17:23:18,804 INFO L226 Difference]: Without dead ends: 717 [2021-02-19 17:23:18,804 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-02-19 17:23:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 502. [2021-02-19 17:23:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7824351297405188) internal successors, (1394), 501 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1394 transitions. [2021-02-19 17:23:18,810 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1394 transitions. Word has length 17 [2021-02-19 17:23:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:18,810 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 1394 transitions. [2021-02-19 17:23:18,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1394 transitions. [2021-02-19 17:23:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:18,811 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:18,811 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:19,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-02-19 17:23:19,032 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:19,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1371211413, now seen corresponding path program 76 times [2021-02-19 17:23:19,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:19,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412278767] [2021-02-19 17:23:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:19,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412278767] [2021-02-19 17:23:19,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095169866] [2021-02-19 17:23:19,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:19,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:19,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:19,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:19,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:19,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:19,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-02-19 17:23:19,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487602417] [2021-02-19 17:23:19,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:19,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:19,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:19,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:19,164 INFO L87 Difference]: Start difference. First operand 502 states and 1394 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:19,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:19,283 INFO L93 Difference]: Finished difference Result 736 states and 1882 transitions. [2021-02-19 17:23:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:23:19,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:19,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:19,285 INFO L225 Difference]: With dead ends: 736 [2021-02-19 17:23:19,285 INFO L226 Difference]: Without dead ends: 728 [2021-02-19 17:23:19,285 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:23:19,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-02-19 17:23:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 506. [2021-02-19 17:23:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.78019801980198) internal successors, (1404), 505 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1404 transitions. [2021-02-19 17:23:19,292 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1404 transitions. Word has length 17 [2021-02-19 17:23:19,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:19,293 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1404 transitions. [2021-02-19 17:23:19,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:19,293 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1404 transitions. [2021-02-19 17:23:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:23:19,293 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:19,294 INFO L506 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:19,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-02-19 17:23:19,513 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:19,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:19,513 INFO L82 PathProgramCache]: Analyzing trace with hash 928312273, now seen corresponding path program 77 times [2021-02-19 17:23:19,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:19,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634713879] [2021-02-19 17:23:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:19,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634713879] [2021-02-19 17:23:19,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046293018] [2021-02-19 17:23:19,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:19,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:23:19,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:19,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:23:19,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:19,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:19,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-02-19 17:23:19,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615663694] [2021-02-19 17:23:19,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:23:19,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:19,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:23:19,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:19,663 INFO L87 Difference]: Start difference. First operand 506 states and 1404 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:19,784 INFO L93 Difference]: Finished difference Result 575 states and 1546 transitions. [2021-02-19 17:23:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:23:19,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:23:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:19,785 INFO L225 Difference]: With dead ends: 575 [2021-02-19 17:23:19,785 INFO L226 Difference]: Without dead ends: 570 [2021-02-19 17:23:19,785 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:23:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-02-19 17:23:19,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 506. [2021-02-19 17:23:19,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.778217821782178) internal successors, (1403), 505 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1403 transitions. [2021-02-19 17:23:19,790 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1403 transitions. Word has length 17 [2021-02-19 17:23:19,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:19,790 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1403 transitions. [2021-02-19 17:23:19,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:19,790 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1403 transitions. [2021-02-19 17:23:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:23:19,791 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:19,791 INFO L506 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:19,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-02-19 17:23:19,992 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:19,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:19,992 INFO L82 PathProgramCache]: Analyzing trace with hash -743606638, now seen corresponding path program 78 times [2021-02-19 17:23:19,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:19,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792836580] [2021-02-19 17:23:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:20,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792836580] [2021-02-19 17:23:20,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037775153] [2021-02-19 17:23:20,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:20,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:23:20,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:20,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:23:20,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:20,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:23:20,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-02-19 17:23:20,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:23:20,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:23:20,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:23:20,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-02-19 17:23:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:20,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:20,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-02-19 17:23:20,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239557652] [2021-02-19 17:23:20,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:23:20,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:20,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:23:20,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:20,359 INFO L87 Difference]: Start difference. First operand 506 states and 1403 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:20,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:20,485 INFO L93 Difference]: Finished difference Result 610 states and 1596 transitions. [2021-02-19 17:23:20,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:20,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-02-19 17:23:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:20,487 INFO L225 Difference]: With dead ends: 610 [2021-02-19 17:23:20,487 INFO L226 Difference]: Without dead ends: 607 [2021-02-19 17:23:20,487 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:20,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-02-19 17:23:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 535. [2021-02-19 17:23:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 2.792134831460674) internal successors, (1491), 534 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1491 transitions. [2021-02-19 17:23:20,494 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1491 transitions. Word has length 18 [2021-02-19 17:23:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:20,495 INFO L480 AbstractCegarLoop]: Abstraction has 535 states and 1491 transitions. [2021-02-19 17:23:20,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1491 transitions. [2021-02-19 17:23:20,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:23:20,496 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:20,496 INFO L506 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:20,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:20,717 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:20,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:20,717 INFO L82 PathProgramCache]: Analyzing trace with hash -615310062, now seen corresponding path program 79 times [2021-02-19 17:23:20,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:20,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933838088] [2021-02-19 17:23:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:20,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933838088] [2021-02-19 17:23:20,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407593749] [2021-02-19 17:23:20,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:20,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:23:20,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:20,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:23:20,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-02-19 17:23:21,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:23:21,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:23:21,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:23:21,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-02-19 17:23:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:21,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:21,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-02-19 17:23:21,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971303571] [2021-02-19 17:23:21,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:23:21,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:21,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:23:21,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:21,127 INFO L87 Difference]: Start difference. First operand 535 states and 1491 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:21,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:21,243 INFO L93 Difference]: Finished difference Result 674 states and 1772 transitions. [2021-02-19 17:23:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:21,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-02-19 17:23:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:21,245 INFO L225 Difference]: With dead ends: 674 [2021-02-19 17:23:21,245 INFO L226 Difference]: Without dead ends: 671 [2021-02-19 17:23:21,245 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-02-19 17:23:21,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 575. [2021-02-19 17:23:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.836236933797909) internal successors, (1628), 574 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:21,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1628 transitions. [2021-02-19 17:23:21,253 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1628 transitions. Word has length 18 [2021-02-19 17:23:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:21,254 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1628 transitions. [2021-02-19 17:23:21,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:21,254 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1628 transitions. [2021-02-19 17:23:21,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:23:21,255 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:21,255 INFO L506 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:21,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:21,475 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:21,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2047323894, now seen corresponding path program 80 times [2021-02-19 17:23:21,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:21,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567068914] [2021-02-19 17:23:21,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:21,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567068914] [2021-02-19 17:23:21,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142263371] [2021-02-19 17:23:21,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:21,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:21,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:21,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:23:21,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:21,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:23:21,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-02-19 17:23:21,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:23:21,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:23:21,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:23:21,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-02-19 17:23:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:21,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:21,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-02-19 17:23:21,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358673] [2021-02-19 17:23:21,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:23:21,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:21,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:23:21,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:21,988 INFO L87 Difference]: Start difference. First operand 575 states and 1628 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:22,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:22,102 INFO L93 Difference]: Finished difference Result 731 states and 1949 transitions. [2021-02-19 17:23:22,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:22,102 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-02-19 17:23:22,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:22,104 INFO L225 Difference]: With dead ends: 731 [2021-02-19 17:23:22,104 INFO L226 Difference]: Without dead ends: 728 [2021-02-19 17:23:22,104 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:22,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-02-19 17:23:22,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 616. [2021-02-19 17:23:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 2.8894308943089433) internal successors, (1777), 615 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1777 transitions. [2021-02-19 17:23:22,113 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1777 transitions. Word has length 18 [2021-02-19 17:23:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:22,114 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 1777 transitions. [2021-02-19 17:23:22,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:22,114 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1777 transitions. [2021-02-19 17:23:22,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:23:22,115 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:22,115 INFO L506 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:22,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-02-19 17:23:22,335 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:22,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:22,335 INFO L82 PathProgramCache]: Analyzing trace with hash 804887570, now seen corresponding path program 81 times [2021-02-19 17:23:22,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:22,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604422228] [2021-02-19 17:23:22,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:22,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604422228] [2021-02-19 17:23:22,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548027792] [2021-02-19 17:23:22,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:22,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:23:22,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:22,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:23:22,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:22,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:23:22,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-02-19 17:23:22,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:23:22,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:23:22,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:23:22,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-02-19 17:23:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:22,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:22,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-02-19 17:23:22,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012860576] [2021-02-19 17:23:22,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:23:22,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:22,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:23:22,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:22,759 INFO L87 Difference]: Start difference. First operand 616 states and 1777 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:22,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:22,935 INFO L93 Difference]: Finished difference Result 778 states and 2109 transitions. [2021-02-19 17:23:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:22,936 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-02-19 17:23:22,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:22,938 INFO L225 Difference]: With dead ends: 778 [2021-02-19 17:23:22,938 INFO L226 Difference]: Without dead ends: 775 [2021-02-19 17:23:22,938 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:22,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-02-19 17:23:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 659. [2021-02-19 17:23:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.9376899696048633) internal successors, (1933), 658 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1933 transitions. [2021-02-19 17:23:22,955 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1933 transitions. Word has length 18 [2021-02-19 17:23:22,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:22,955 INFO L480 AbstractCegarLoop]: Abstraction has 659 states and 1933 transitions. [2021-02-19 17:23:22,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1933 transitions. [2021-02-19 17:23:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:23:22,956 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:22,956 INFO L506 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:23,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-02-19 17:23:23,179 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:23,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:23,180 INFO L82 PathProgramCache]: Analyzing trace with hash -970870262, now seen corresponding path program 82 times [2021-02-19 17:23:23,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:23,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050392977] [2021-02-19 17:23:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:23,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050392977] [2021-02-19 17:23:23,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246584990] [2021-02-19 17:23:23,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:23,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:23,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:23,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:23:23,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:23,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:23:23,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-02-19 17:23:23,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:23:23,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:23:23,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:23:23,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-02-19 17:23:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:23,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:23,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-02-19 17:23:23,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959575826] [2021-02-19 17:23:23,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:23:23,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:23,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:23:23,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:23,504 INFO L87 Difference]: Start difference. First operand 659 states and 1933 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:23,632 INFO L93 Difference]: Finished difference Result 823 states and 2281 transitions. [2021-02-19 17:23:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:23,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-02-19 17:23:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:23,634 INFO L225 Difference]: With dead ends: 823 [2021-02-19 17:23:23,634 INFO L226 Difference]: Without dead ends: 820 [2021-02-19 17:23:23,634 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:23,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-02-19 17:23:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 714. [2021-02-19 17:23:23,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 2.985974754558205) internal successors, (2129), 713 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2129 transitions. [2021-02-19 17:23:23,645 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2129 transitions. Word has length 18 [2021-02-19 17:23:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:23,645 INFO L480 AbstractCegarLoop]: Abstraction has 714 states and 2129 transitions. [2021-02-19 17:23:23,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2129 transitions. [2021-02-19 17:23:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:23:23,647 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:23,647 INFO L506 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:23,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:23,867 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:23,867 INFO L82 PathProgramCache]: Analyzing trace with hash -184788206, now seen corresponding path program 83 times [2021-02-19 17:23:23,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:23,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128994902] [2021-02-19 17:23:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:23,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128994902] [2021-02-19 17:23:23,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174680577] [2021-02-19 17:23:23,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:23,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:23:23,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:23,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:23:23,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:24,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:23:24,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-02-19 17:23:24,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:23:24,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:23:24,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:23:24,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-02-19 17:23:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:24,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:24,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-02-19 17:23:24,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257542460] [2021-02-19 17:23:24,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:23:24,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:24,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:23:24,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:24,235 INFO L87 Difference]: Start difference. First operand 714 states and 2129 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:24,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:24,431 INFO L93 Difference]: Finished difference Result 908 states and 2540 transitions. [2021-02-19 17:23:24,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:24,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-02-19 17:23:24,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:24,434 INFO L225 Difference]: With dead ends: 908 [2021-02-19 17:23:24,434 INFO L226 Difference]: Without dead ends: 905 [2021-02-19 17:23:24,434 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:24,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-02-19 17:23:24,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 800. [2021-02-19 17:23:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.0) internal successors, (2397), 799 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2397 transitions. [2021-02-19 17:23:24,447 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2397 transitions. Word has length 18 [2021-02-19 17:23:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:24,447 INFO L480 AbstractCegarLoop]: Abstraction has 800 states and 2397 transitions. [2021-02-19 17:23:24,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:24,447 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2397 transitions. [2021-02-19 17:23:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 17:23:24,448 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:24,448 INFO L506 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:24,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-02-19 17:23:24,662 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:24,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:24,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1586048246, now seen corresponding path program 84 times [2021-02-19 17:23:24,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:24,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896123416] [2021-02-19 17:23:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:24,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896123416] [2021-02-19 17:23:24,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005093779] [2021-02-19 17:23:24,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:24,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:23:24,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:24,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:23:24,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:24,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:23:24,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-02-19 17:23:25,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:23:25,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:23:25,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:23:25,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-02-19 17:23:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:25,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:25,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-02-19 17:23:25,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037838370] [2021-02-19 17:23:25,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:23:25,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:25,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:23:25,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:25,015 INFO L87 Difference]: Start difference. First operand 800 states and 2397 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:25,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:25,147 INFO L93 Difference]: Finished difference Result 974 states and 2756 transitions. [2021-02-19 17:23:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:25,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-02-19 17:23:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:25,149 INFO L225 Difference]: With dead ends: 974 [2021-02-19 17:23:25,149 INFO L226 Difference]: Without dead ends: 971 [2021-02-19 17:23:25,149 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:25,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-02-19 17:23:25,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 872. [2021-02-19 17:23:25,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.0114810562571757) internal successors, (2623), 871 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2623 transitions. [2021-02-19 17:23:25,170 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2623 transitions. Word has length 18 [2021-02-19 17:23:25,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:25,170 INFO L480 AbstractCegarLoop]: Abstraction has 872 states and 2623 transitions. [2021-02-19 17:23:25,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:25,170 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2623 transitions. [2021-02-19 17:23:25,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:25,171 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:25,171 INFO L506 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:25,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-02-19 17:23:25,371 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:25,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:25,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1512712944, now seen corresponding path program 85 times [2021-02-19 17:23:25,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:25,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627490709] [2021-02-19 17:23:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:25,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627490709] [2021-02-19 17:23:25,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908920553] [2021-02-19 17:23:25,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:25,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:25,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:25,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:25,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-02-19 17:23:25,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567859458] [2021-02-19 17:23:25,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:25,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:25,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:25,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:25,503 INFO L87 Difference]: Start difference. First operand 872 states and 2623 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:25,646 INFO L93 Difference]: Finished difference Result 993 states and 2794 transitions. [2021-02-19 17:23:25,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:25,646 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:25,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:25,648 INFO L225 Difference]: With dead ends: 993 [2021-02-19 17:23:25,648 INFO L226 Difference]: Without dead ends: 993 [2021-02-19 17:23:25,648 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:23:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-02-19 17:23:25,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 868. [2021-02-19 17:23:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.0069204152249136) internal successors, (2607), 867 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2607 transitions. [2021-02-19 17:23:25,661 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2607 transitions. Word has length 19 [2021-02-19 17:23:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:25,661 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 2607 transitions. [2021-02-19 17:23:25,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2607 transitions. [2021-02-19 17:23:25,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:25,662 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:25,662 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:25,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-02-19 17:23:25,878 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:25,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:25,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1553894777, now seen corresponding path program 86 times [2021-02-19 17:23:25,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:25,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132579371] [2021-02-19 17:23:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:25,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132579371] [2021-02-19 17:23:25,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58690892] [2021-02-19 17:23:25,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:25,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:25,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:25,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:25,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:26,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:26,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-02-19 17:23:26,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707595139] [2021-02-19 17:23:26,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:26,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:26,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:26,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:26,005 INFO L87 Difference]: Start difference. First operand 868 states and 2607 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:26,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:26,190 INFO L93 Difference]: Finished difference Result 1076 states and 2933 transitions. [2021-02-19 17:23:26,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:23:26,191 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:26,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:26,192 INFO L225 Difference]: With dead ends: 1076 [2021-02-19 17:23:26,192 INFO L226 Difference]: Without dead ends: 1067 [2021-02-19 17:23:26,192 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:23:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-02-19 17:23:26,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 886. [2021-02-19 17:23:26,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.994350282485876) internal successors, (2650), 885 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2650 transitions. [2021-02-19 17:23:26,203 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2650 transitions. Word has length 19 [2021-02-19 17:23:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:26,203 INFO L480 AbstractCegarLoop]: Abstraction has 886 states and 2650 transitions. [2021-02-19 17:23:26,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:26,203 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2650 transitions. [2021-02-19 17:23:26,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:26,205 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:26,205 INFO L506 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:26,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-02-19 17:23:26,420 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:26,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:26,421 INFO L82 PathProgramCache]: Analyzing trace with hash 361038322, now seen corresponding path program 87 times [2021-02-19 17:23:26,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:26,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112072779] [2021-02-19 17:23:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:26,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112072779] [2021-02-19 17:23:26,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167611239] [2021-02-19 17:23:26,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:26,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:23:26,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:26,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:26,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:26,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:26,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:26,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367289546] [2021-02-19 17:23:26,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:26,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:26,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:26,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:26,541 INFO L87 Difference]: Start difference. First operand 886 states and 2650 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:26,661 INFO L93 Difference]: Finished difference Result 917 states and 2693 transitions. [2021-02-19 17:23:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:26,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:26,662 INFO L225 Difference]: With dead ends: 917 [2021-02-19 17:23:26,663 INFO L226 Difference]: Without dead ends: 916 [2021-02-19 17:23:26,663 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-02-19 17:23:26,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 886. [2021-02-19 17:23:26,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.992090395480226) internal successors, (2648), 885 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2648 transitions. [2021-02-19 17:23:26,682 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2648 transitions. Word has length 19 [2021-02-19 17:23:26,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:26,682 INFO L480 AbstractCegarLoop]: Abstraction has 886 states and 2648 transitions. [2021-02-19 17:23:26,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2648 transitions. [2021-02-19 17:23:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:26,683 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:26,683 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:26,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-02-19 17:23:26,892 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:26,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:26,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1278094675, now seen corresponding path program 88 times [2021-02-19 17:23:26,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:26,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330134519] [2021-02-19 17:23:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:26,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330134519] [2021-02-19 17:23:26,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080473956] [2021-02-19 17:23:26,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:26,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:26,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:26,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:26,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:26,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:26,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:26,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131475020] [2021-02-19 17:23:26,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:26,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:26,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:26,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:26,999 INFO L87 Difference]: Start difference. First operand 886 states and 2648 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:27,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:27,055 INFO L93 Difference]: Finished difference Result 1091 states and 2973 transitions. [2021-02-19 17:23:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:23:27,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:27,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:27,057 INFO L225 Difference]: With dead ends: 1091 [2021-02-19 17:23:27,057 INFO L226 Difference]: Without dead ends: 1091 [2021-02-19 17:23:27,057 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-02-19 17:23:27,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 869. [2021-02-19 17:23:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.975806451612903) internal successors, (2583), 868 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:27,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2583 transitions. [2021-02-19 17:23:27,070 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2583 transitions. Word has length 19 [2021-02-19 17:23:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:27,070 INFO L480 AbstractCegarLoop]: Abstraction has 869 states and 2583 transitions. [2021-02-19 17:23:27,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2583 transitions. [2021-02-19 17:23:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:27,071 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:27,072 INFO L506 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:27,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:27,282 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:27,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:27,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1478537096, now seen corresponding path program 89 times [2021-02-19 17:23:27,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:27,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867766988] [2021-02-19 17:23:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:27,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867766988] [2021-02-19 17:23:27,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032677113] [2021-02-19 17:23:27,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:27,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:23:27,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:27,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:27,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:27,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:27,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:27,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798761024] [2021-02-19 17:23:27,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:27,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:27,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:27,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:27,382 INFO L87 Difference]: Start difference. First operand 869 states and 2583 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:27,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:27,457 INFO L93 Difference]: Finished difference Result 1088 states and 2969 transitions. [2021-02-19 17:23:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:23:27,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:27,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:27,458 INFO L225 Difference]: With dead ends: 1088 [2021-02-19 17:23:27,458 INFO L226 Difference]: Without dead ends: 1088 [2021-02-19 17:23:27,458 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-02-19 17:23:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 899. [2021-02-19 17:23:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.9844097995545655) internal successors, (2680), 898 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:27,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2680 transitions. [2021-02-19 17:23:27,471 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2680 transitions. Word has length 19 [2021-02-19 17:23:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:27,471 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 2680 transitions. [2021-02-19 17:23:27,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:27,471 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2680 transitions. [2021-02-19 17:23:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:27,473 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:27,473 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:27,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-02-19 17:23:27,693 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:27,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:27,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1871668217, now seen corresponding path program 90 times [2021-02-19 17:23:27,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:27,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128094791] [2021-02-19 17:23:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:27,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128094791] [2021-02-19 17:23:27,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176345575] [2021-02-19 17:23:27,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:27,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:23:27,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:27,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:27,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:27,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:27,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:27,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659730781] [2021-02-19 17:23:27,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:27,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:27,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:27,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:27,793 INFO L87 Difference]: Start difference. First operand 899 states and 2680 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:27,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:27,897 INFO L93 Difference]: Finished difference Result 1083 states and 2957 transitions. [2021-02-19 17:23:27,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:27,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:27,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:27,898 INFO L225 Difference]: With dead ends: 1083 [2021-02-19 17:23:27,898 INFO L226 Difference]: Without dead ends: 1081 [2021-02-19 17:23:27,898 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-02-19 17:23:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 907. [2021-02-19 17:23:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.987858719646799) internal successors, (2707), 906 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2707 transitions. [2021-02-19 17:23:27,908 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2707 transitions. Word has length 19 [2021-02-19 17:23:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:27,908 INFO L480 AbstractCegarLoop]: Abstraction has 907 states and 2707 transitions. [2021-02-19 17:23:27,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2707 transitions. [2021-02-19 17:23:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:27,909 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:27,909 INFO L506 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:28,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-02-19 17:23:28,110 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:28,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:28,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1070975510, now seen corresponding path program 91 times [2021-02-19 17:23:28,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:28,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615592817] [2021-02-19 17:23:28,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:28,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615592817] [2021-02-19 17:23:28,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578517034] [2021-02-19 17:23:28,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:28,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:28,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:28,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:28,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:28,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360898389] [2021-02-19 17:23:28,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:28,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:28,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:28,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:28,217 INFO L87 Difference]: Start difference. First operand 907 states and 2707 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:28,342 INFO L93 Difference]: Finished difference Result 1039 states and 2898 transitions. [2021-02-19 17:23:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:28,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:28,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:28,344 INFO L225 Difference]: With dead ends: 1039 [2021-02-19 17:23:28,344 INFO L226 Difference]: Without dead ends: 1037 [2021-02-19 17:23:28,344 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-02-19 17:23:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 884. [2021-02-19 17:23:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.9750849377123445) internal successors, (2627), 883 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2627 transitions. [2021-02-19 17:23:28,355 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2627 transitions. Word has length 19 [2021-02-19 17:23:28,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:28,355 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 2627 transitions. [2021-02-19 17:23:28,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:28,356 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2627 transitions. [2021-02-19 17:23:28,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:28,357 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:28,357 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:28,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-02-19 17:23:28,570 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:28,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:28,570 INFO L82 PathProgramCache]: Analyzing trace with hash -153919157, now seen corresponding path program 92 times [2021-02-19 17:23:28,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:28,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024840443] [2021-02-19 17:23:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:28,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024840443] [2021-02-19 17:23:28,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744660338] [2021-02-19 17:23:28,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:28,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:28,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:28,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:28,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:28,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:28,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:28,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024830864] [2021-02-19 17:23:28,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:28,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:28,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:28,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:28,686 INFO L87 Difference]: Start difference. First operand 884 states and 2627 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:28,736 INFO L93 Difference]: Finished difference Result 1108 states and 2970 transitions. [2021-02-19 17:23:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:23:28,736 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:28,737 INFO L225 Difference]: With dead ends: 1108 [2021-02-19 17:23:28,737 INFO L226 Difference]: Without dead ends: 1108 [2021-02-19 17:23:28,737 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-02-19 17:23:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 887. [2021-02-19 17:23:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.9729119638826185) internal successors, (2634), 886 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2634 transitions. [2021-02-19 17:23:28,747 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2634 transitions. Word has length 19 [2021-02-19 17:23:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:28,747 INFO L480 AbstractCegarLoop]: Abstraction has 887 states and 2634 transitions. [2021-02-19 17:23:28,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2634 transitions. [2021-02-19 17:23:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:28,748 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:28,748 INFO L506 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:28,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable548 [2021-02-19 17:23:28,949 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:28,949 INFO L82 PathProgramCache]: Analyzing trace with hash 639637798, now seen corresponding path program 93 times [2021-02-19 17:23:28,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:28,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871603976] [2021-02-19 17:23:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:28,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871603976] [2021-02-19 17:23:28,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339940759] [2021-02-19 17:23:28,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:29,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:23:29,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:29,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:23:29,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 17:23:29,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:29,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-02-19 17:23:29,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022393155] [2021-02-19 17:23:29,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:23:29,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:29,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:23:29,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:29,107 INFO L87 Difference]: Start difference. First operand 887 states and 2634 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:29,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:29,656 INFO L93 Difference]: Finished difference Result 2007 states and 5647 transitions. [2021-02-19 17:23:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 17:23:29,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:29,658 INFO L225 Difference]: With dead ends: 2007 [2021-02-19 17:23:29,658 INFO L226 Difference]: Without dead ends: 1998 [2021-02-19 17:23:29,659 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=356, Invalid=2836, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 17:23:29,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-02-19 17:23:29,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1397. [2021-02-19 17:23:29,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.930515759312321) internal successors, (4091), 1396 states have internal predecessors, (4091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4091 transitions. [2021-02-19 17:23:29,680 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4091 transitions. Word has length 19 [2021-02-19 17:23:29,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:29,680 INFO L480 AbstractCegarLoop]: Abstraction has 1397 states and 4091 transitions. [2021-02-19 17:23:29,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:29,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4091 transitions. [2021-02-19 17:23:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:29,682 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:29,682 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:29,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:29,882 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:29,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:29,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1882966491, now seen corresponding path program 94 times [2021-02-19 17:23:29,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:29,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207793083] [2021-02-19 17:23:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:29,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207793083] [2021-02-19 17:23:29,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323597171] [2021-02-19 17:23:29,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:29,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:29,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:29,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:29,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:30,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:30,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-02-19 17:23:30,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129171160] [2021-02-19 17:23:30,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:30,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:30,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:30,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:30,012 INFO L87 Difference]: Start difference. First operand 1397 states and 4091 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:30,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:30,090 INFO L93 Difference]: Finished difference Result 1816 states and 4866 transitions. [2021-02-19 17:23:30,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:23:30,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:30,093 INFO L225 Difference]: With dead ends: 1816 [2021-02-19 17:23:30,093 INFO L226 Difference]: Without dead ends: 1816 [2021-02-19 17:23:30,093 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-02-19 17:23:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1363. [2021-02-19 17:23:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.9140969162995596) internal successors, (3969), 1362 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3969 transitions. [2021-02-19 17:23:30,115 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3969 transitions. Word has length 19 [2021-02-19 17:23:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:30,115 INFO L480 AbstractCegarLoop]: Abstraction has 1363 states and 3969 transitions. [2021-02-19 17:23:30,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3969 transitions. [2021-02-19 17:23:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:30,117 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:30,118 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:30,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:30,339 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:30,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:30,339 INFO L82 PathProgramCache]: Analyzing trace with hash 980543247, now seen corresponding path program 95 times [2021-02-19 17:23:30,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:30,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859298396] [2021-02-19 17:23:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:30,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859298396] [2021-02-19 17:23:30,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869312880] [2021-02-19 17:23:30,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:30,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:23:30,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:30,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:30,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:30,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:30,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:30,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306224543] [2021-02-19 17:23:30,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:30,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:30,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:30,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:30,439 INFO L87 Difference]: Start difference. First operand 1363 states and 3969 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:30,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:30,541 INFO L93 Difference]: Finished difference Result 1590 states and 4309 transitions. [2021-02-19 17:23:30,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:30,542 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:30,543 INFO L225 Difference]: With dead ends: 1590 [2021-02-19 17:23:30,543 INFO L226 Difference]: Without dead ends: 1588 [2021-02-19 17:23:30,543 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:30,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-02-19 17:23:30,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1376. [2021-02-19 17:23:30,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 2.9134545454545453) internal successors, (4006), 1375 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:30,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4006 transitions. [2021-02-19 17:23:30,558 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4006 transitions. Word has length 19 [2021-02-19 17:23:30,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:30,558 INFO L480 AbstractCegarLoop]: Abstraction has 1376 states and 4006 transitions. [2021-02-19 17:23:30,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4006 transitions. [2021-02-19 17:23:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:30,560 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:30,560 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:30,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-02-19 17:23:30,762 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:30,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:30,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1596674989, now seen corresponding path program 96 times [2021-02-19 17:23:30,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:30,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216936841] [2021-02-19 17:23:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:30,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216936841] [2021-02-19 17:23:30,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375337776] [2021-02-19 17:23:30,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:30,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:23:30,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:30,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:30,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:30,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:30,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:30,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191680423] [2021-02-19 17:23:30,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:30,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:30,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:30,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:30,888 INFO L87 Difference]: Start difference. First operand 1376 states and 4006 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:30,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:30,941 INFO L93 Difference]: Finished difference Result 1582 states and 4263 transitions. [2021-02-19 17:23:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:23:30,942 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:30,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:30,943 INFO L225 Difference]: With dead ends: 1582 [2021-02-19 17:23:30,943 INFO L226 Difference]: Without dead ends: 1582 [2021-02-19 17:23:30,944 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:30,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-02-19 17:23:30,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1360. [2021-02-19 17:23:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.9021339220014717) internal successors, (3944), 1359 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3944 transitions. [2021-02-19 17:23:30,965 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3944 transitions. Word has length 19 [2021-02-19 17:23:30,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:30,965 INFO L480 AbstractCegarLoop]: Abstraction has 1360 states and 3944 transitions. [2021-02-19 17:23:30,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:30,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3944 transitions. [2021-02-19 17:23:30,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:30,968 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:30,968 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:31,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-02-19 17:23:31,183 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:31,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:31,183 INFO L82 PathProgramCache]: Analyzing trace with hash 969244973, now seen corresponding path program 97 times [2021-02-19 17:23:31,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:31,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245119330] [2021-02-19 17:23:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:31,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245119330] [2021-02-19 17:23:31,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937317358] [2021-02-19 17:23:31,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:31,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:31,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:31,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:31,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:23:31,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612824782] [2021-02-19 17:23:31,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:31,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:31,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:31,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:31,304 INFO L87 Difference]: Start difference. First operand 1360 states and 3944 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:31,372 INFO L93 Difference]: Finished difference Result 1713 states and 4555 transitions. [2021-02-19 17:23:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:23:31,372 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:31,373 INFO L225 Difference]: With dead ends: 1713 [2021-02-19 17:23:31,374 INFO L226 Difference]: Without dead ends: 1713 [2021-02-19 17:23:31,374 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:31,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-02-19 17:23:31,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1363. [2021-02-19 17:23:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.9023494860499266) internal successors, (3953), 1362 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3953 transitions. [2021-02-19 17:23:31,388 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3953 transitions. Word has length 19 [2021-02-19 17:23:31,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:31,388 INFO L480 AbstractCegarLoop]: Abstraction has 1363 states and 3953 transitions. [2021-02-19 17:23:31,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:31,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3953 transitions. [2021-02-19 17:23:31,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:31,389 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:31,389 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:31,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:31,589 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:31,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:31,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1091614829, now seen corresponding path program 98 times [2021-02-19 17:23:31,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:31,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361766151] [2021-02-19 17:23:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:31,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361766151] [2021-02-19 17:23:31,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238660312] [2021-02-19 17:23:31,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:31,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:31,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:31,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:31,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:31,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:31,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:23:31,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504485605] [2021-02-19 17:23:31,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:31,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:31,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:31,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:31,702 INFO L87 Difference]: Start difference. First operand 1363 states and 3953 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:31,792 INFO L93 Difference]: Finished difference Result 2155 states and 5922 transitions. [2021-02-19 17:23:31,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:31,792 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:31,794 INFO L225 Difference]: With dead ends: 2155 [2021-02-19 17:23:31,794 INFO L226 Difference]: Without dead ends: 2155 [2021-02-19 17:23:31,794 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-02-19 17:23:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1651. [2021-02-19 17:23:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 2.983030303030303) internal successors, (4922), 1650 states have internal predecessors, (4922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4922 transitions. [2021-02-19 17:23:31,813 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4922 transitions. Word has length 19 [2021-02-19 17:23:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:31,813 INFO L480 AbstractCegarLoop]: Abstraction has 1651 states and 4922 transitions. [2021-02-19 17:23:31,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:31,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4922 transitions. [2021-02-19 17:23:31,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:31,815 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:31,815 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:32,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-02-19 17:23:32,015 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:32,016 INFO L82 PathProgramCache]: Analyzing trace with hash -476477403, now seen corresponding path program 99 times [2021-02-19 17:23:32,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:32,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549954231] [2021-02-19 17:23:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:32,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549954231] [2021-02-19 17:23:32,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819001622] [2021-02-19 17:23:32,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:32,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:23:32,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:32,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:32,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:23:32,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:32,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 17:23:32,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243349554] [2021-02-19 17:23:32,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:23:32,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:32,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:23:32,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:23:32,126 INFO L87 Difference]: Start difference. First operand 1651 states and 4922 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:32,250 INFO L93 Difference]: Finished difference Result 1877 states and 5329 transitions. [2021-02-19 17:23:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:23:32,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:32,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:32,253 INFO L225 Difference]: With dead ends: 1877 [2021-02-19 17:23:32,253 INFO L226 Difference]: Without dead ends: 1873 [2021-02-19 17:23:32,253 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:23:32,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-02-19 17:23:32,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1703. [2021-02-19 17:23:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 2.9958871915393654) internal successors, (5099), 1702 states have internal predecessors, (5099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:32,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5099 transitions. [2021-02-19 17:23:32,277 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5099 transitions. Word has length 19 [2021-02-19 17:23:32,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:32,277 INFO L480 AbstractCegarLoop]: Abstraction has 1703 states and 5099 transitions. [2021-02-19 17:23:32,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:32,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5099 transitions. [2021-02-19 17:23:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:32,279 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:32,279 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:32,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:32,480 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:32,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:32,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1933940901, now seen corresponding path program 100 times [2021-02-19 17:23:32,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:32,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720834419] [2021-02-19 17:23:32,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:32,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720834419] [2021-02-19 17:23:32,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072065720] [2021-02-19 17:23:32,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:32,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:32,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:32,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:32,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:32,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:32,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:23:32,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735473297] [2021-02-19 17:23:32,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:32,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:32,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:32,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:32,586 INFO L87 Difference]: Start difference. First operand 1703 states and 5099 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:32,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:32,677 INFO L93 Difference]: Finished difference Result 2270 states and 6309 transitions. [2021-02-19 17:23:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:32,677 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:32,679 INFO L225 Difference]: With dead ends: 2270 [2021-02-19 17:23:32,679 INFO L226 Difference]: Without dead ends: 2270 [2021-02-19 17:23:32,679 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-02-19 17:23:32,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1409. [2021-02-19 17:23:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 2.9396306818181817) internal successors, (4139), 1408 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:32,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4139 transitions. [2021-02-19 17:23:32,696 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4139 transitions. Word has length 19 [2021-02-19 17:23:32,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:32,696 INFO L480 AbstractCegarLoop]: Abstraction has 1409 states and 4139 transitions. [2021-02-19 17:23:32,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:32,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4139 transitions. [2021-02-19 17:23:32,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:32,697 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:32,697 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:32,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-02-19 17:23:32,898 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:32,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:32,899 INFO L82 PathProgramCache]: Analyzing trace with hash -795214585, now seen corresponding path program 101 times [2021-02-19 17:23:32,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:32,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343822153] [2021-02-19 17:23:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:32,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343822153] [2021-02-19 17:23:32,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279366256] [2021-02-19 17:23:32,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:32,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:23:32,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:32,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:32,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:33,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:33,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:33,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788019935] [2021-02-19 17:23:33,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:33,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:33,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:33,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:33,004 INFO L87 Difference]: Start difference. First operand 1409 states and 4139 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:33,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:33,107 INFO L93 Difference]: Finished difference Result 1616 states and 4431 transitions. [2021-02-19 17:23:33,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:33,108 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:33,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:33,109 INFO L225 Difference]: With dead ends: 1616 [2021-02-19 17:23:33,109 INFO L226 Difference]: Without dead ends: 1612 [2021-02-19 17:23:33,109 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-02-19 17:23:33,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1392. [2021-02-19 17:23:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 2.9281092739036665) internal successors, (4073), 1391 states have internal predecessors, (4073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:33,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4073 transitions. [2021-02-19 17:23:33,124 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4073 transitions. Word has length 19 [2021-02-19 17:23:33,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:33,125 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4073 transitions. [2021-02-19 17:23:33,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4073 transitions. [2021-02-19 17:23:33,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:33,126 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:33,126 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:33,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:33,334 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:33,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:33,334 INFO L82 PathProgramCache]: Analyzing trace with hash 922534475, now seen corresponding path program 102 times [2021-02-19 17:23:33,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:33,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452182894] [2021-02-19 17:23:33,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:33,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452182894] [2021-02-19 17:23:33,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412826375] [2021-02-19 17:23:33,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:33,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:23:33,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:33,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:33,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:33,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:33,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:33,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208991431] [2021-02-19 17:23:33,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:33,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:33,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:33,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:33,445 INFO L87 Difference]: Start difference. First operand 1392 states and 4073 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:33,506 INFO L93 Difference]: Finished difference Result 1671 states and 4517 transitions. [2021-02-19 17:23:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:23:33,507 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:33,508 INFO L225 Difference]: With dead ends: 1671 [2021-02-19 17:23:33,509 INFO L226 Difference]: Without dead ends: 1671 [2021-02-19 17:23:33,509 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-02-19 17:23:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1393. [2021-02-19 17:23:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.923132183908046) internal successors, (4069), 1392 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:33,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 4069 transitions. [2021-02-19 17:23:33,528 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 4069 transitions. Word has length 19 [2021-02-19 17:23:33,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:33,528 INFO L480 AbstractCegarLoop]: Abstraction has 1393 states and 4069 transitions. [2021-02-19 17:23:33,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:33,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 4069 transitions. [2021-02-19 17:23:33,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:33,529 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:33,529 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:33,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-02-19 17:23:33,746 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:33,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:33,747 INFO L82 PathProgramCache]: Analyzing trace with hash -806512859, now seen corresponding path program 103 times [2021-02-19 17:23:33,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:33,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94714056] [2021-02-19 17:23:33,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:33,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94714056] [2021-02-19 17:23:33,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124792843] [2021-02-19 17:23:33,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:33,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:33,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:33,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:33,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-02-19 17:23:33,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304615973] [2021-02-19 17:23:33,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:33,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:33,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:33,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:33,861 INFO L87 Difference]: Start difference. First operand 1393 states and 4069 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:33,929 INFO L93 Difference]: Finished difference Result 1578 states and 4284 transitions. [2021-02-19 17:23:33,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:23:33,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:33,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:33,932 INFO L225 Difference]: With dead ends: 1578 [2021-02-19 17:23:33,932 INFO L226 Difference]: Without dead ends: 1578 [2021-02-19 17:23:33,932 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:33,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-02-19 17:23:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1355. [2021-02-19 17:23:33,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 2.9084194977843425) internal successors, (3938), 1354 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 3938 transitions. [2021-02-19 17:23:33,950 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 3938 transitions. Word has length 19 [2021-02-19 17:23:33,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:33,950 INFO L480 AbstractCegarLoop]: Abstraction has 1355 states and 3938 transitions. [2021-02-19 17:23:33,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:33,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 3938 transitions. [2021-02-19 17:23:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:33,952 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:33,952 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:34,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-02-19 17:23:34,173 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:34,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1427594635, now seen corresponding path program 104 times [2021-02-19 17:23:34,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:34,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746997580] [2021-02-19 17:23:34,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:34,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746997580] [2021-02-19 17:23:34,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838492064] [2021-02-19 17:23:34,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:34,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:34,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:34,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:34,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:34,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:34,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-02-19 17:23:34,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598287248] [2021-02-19 17:23:34,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:34,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:34,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:34,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:34,293 INFO L87 Difference]: Start difference. First operand 1355 states and 3938 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:34,374 INFO L93 Difference]: Finished difference Result 1698 states and 4556 transitions. [2021-02-19 17:23:34,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:23:34,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:34,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:34,376 INFO L225 Difference]: With dead ends: 1698 [2021-02-19 17:23:34,376 INFO L226 Difference]: Without dead ends: 1698 [2021-02-19 17:23:34,376 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:34,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-02-19 17:23:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1299. [2021-02-19 17:23:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.8821263482280433) internal successors, (3741), 1298 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3741 transitions. [2021-02-19 17:23:34,389 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3741 transitions. Word has length 19 [2021-02-19 17:23:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:34,389 INFO L480 AbstractCegarLoop]: Abstraction has 1299 states and 3741 transitions. [2021-02-19 17:23:34,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3741 transitions. [2021-02-19 17:23:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:34,390 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:34,390 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:34,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:34,599 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:34,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:34,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1965450213, now seen corresponding path program 105 times [2021-02-19 17:23:34,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:34,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936120313] [2021-02-19 17:23:34,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:34,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936120313] [2021-02-19 17:23:34,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060571049] [2021-02-19 17:23:34,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:34,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:23:34,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:34,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:34,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:34,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:34,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-02-19 17:23:34,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212827114] [2021-02-19 17:23:34,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:34,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:34,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:34,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:34,721 INFO L87 Difference]: Start difference. First operand 1299 states and 3741 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:34,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:34,842 INFO L93 Difference]: Finished difference Result 2138 states and 5768 transitions. [2021-02-19 17:23:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:23:34,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:34,844 INFO L225 Difference]: With dead ends: 2138 [2021-02-19 17:23:34,844 INFO L226 Difference]: Without dead ends: 2138 [2021-02-19 17:23:34,844 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:23:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-02-19 17:23:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1510. [2021-02-19 17:23:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 2.952286282306163) internal successors, (4455), 1509 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 4455 transitions. [2021-02-19 17:23:34,861 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 4455 transitions. Word has length 19 [2021-02-19 17:23:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:34,862 INFO L480 AbstractCegarLoop]: Abstraction has 1510 states and 4455 transitions. [2021-02-19 17:23:34,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 4455 transitions. [2021-02-19 17:23:34,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:34,863 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:34,863 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:35,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:35,063 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:35,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:35,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1268397331, now seen corresponding path program 106 times [2021-02-19 17:23:35,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:35,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417340438] [2021-02-19 17:23:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:35,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417340438] [2021-02-19 17:23:35,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024096443] [2021-02-19 17:23:35,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:35,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:35,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:35,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:35,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:35,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:35,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:23:35,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30661799] [2021-02-19 17:23:35,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:35,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:35,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:35,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:35,165 INFO L87 Difference]: Start difference. First operand 1510 states and 4455 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:35,282 INFO L93 Difference]: Finished difference Result 1994 states and 5446 transitions. [2021-02-19 17:23:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:23:35,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:35,284 INFO L225 Difference]: With dead ends: 1994 [2021-02-19 17:23:35,284 INFO L226 Difference]: Without dead ends: 1994 [2021-02-19 17:23:35,285 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:23:35,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-02-19 17:23:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1216. [2021-02-19 17:23:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 2.891358024691358) internal successors, (3513), 1215 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:35,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 3513 transitions. [2021-02-19 17:23:35,299 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 3513 transitions. Word has length 19 [2021-02-19 17:23:35,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:35,299 INFO L480 AbstractCegarLoop]: Abstraction has 1216 states and 3513 transitions. [2021-02-19 17:23:35,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 3513 transitions. [2021-02-19 17:23:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:35,300 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:35,300 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:35,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-02-19 17:23:35,500 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:35,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:35,501 INFO L82 PathProgramCache]: Analyzing trace with hash -9132529, now seen corresponding path program 107 times [2021-02-19 17:23:35,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:35,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537174692] [2021-02-19 17:23:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:35,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537174692] [2021-02-19 17:23:35,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148790248] [2021-02-19 17:23:35,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:35,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:23:35,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:35,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:35,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:35,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:35,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:35,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428642839] [2021-02-19 17:23:35,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:35,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:35,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:35,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:35,625 INFO L87 Difference]: Start difference. First operand 1216 states and 3513 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:35,732 INFO L93 Difference]: Finished difference Result 1394 states and 3767 transitions. [2021-02-19 17:23:35,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:35,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:35,734 INFO L225 Difference]: With dead ends: 1394 [2021-02-19 17:23:35,734 INFO L226 Difference]: Without dead ends: 1390 [2021-02-19 17:23:35,734 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:35,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-02-19 17:23:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1183. [2021-02-19 17:23:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.8705583756345177) internal successors, (3393), 1182 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3393 transitions. [2021-02-19 17:23:35,751 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3393 transitions. Word has length 19 [2021-02-19 17:23:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:35,751 INFO L480 AbstractCegarLoop]: Abstraction has 1183 states and 3393 transitions. [2021-02-19 17:23:35,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3393 transitions. [2021-02-19 17:23:35,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:35,753 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:35,753 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:35,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:35,972 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:35,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1708616531, now seen corresponding path program 108 times [2021-02-19 17:23:35,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:35,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194807251] [2021-02-19 17:23:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:36,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194807251] [2021-02-19 17:23:36,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878007947] [2021-02-19 17:23:36,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:36,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:23:36,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:36,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:36,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:36,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:36,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:36,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669064446] [2021-02-19 17:23:36,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:36,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:36,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:36,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:36,087 INFO L87 Difference]: Start difference. First operand 1183 states and 3393 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:36,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:36,158 INFO L93 Difference]: Finished difference Result 1453 states and 3839 transitions. [2021-02-19 17:23:36,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:23:36,158 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:36,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:36,160 INFO L225 Difference]: With dead ends: 1453 [2021-02-19 17:23:36,160 INFO L226 Difference]: Without dead ends: 1453 [2021-02-19 17:23:36,160 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-02-19 17:23:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1189. [2021-02-19 17:23:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.8678451178451176) internal successors, (3407), 1188 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3407 transitions. [2021-02-19 17:23:36,179 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3407 transitions. Word has length 19 [2021-02-19 17:23:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:36,179 INFO L480 AbstractCegarLoop]: Abstraction has 1189 states and 3407 transitions. [2021-02-19 17:23:36,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:36,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3407 transitions. [2021-02-19 17:23:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:36,180 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:36,180 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:36,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-02-19 17:23:36,394 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:36,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:36,394 INFO L82 PathProgramCache]: Analyzing trace with hash -20430803, now seen corresponding path program 109 times [2021-02-19 17:23:36,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:36,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849009122] [2021-02-19 17:23:36,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:36,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849009122] [2021-02-19 17:23:36,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939516537] [2021-02-19 17:23:36,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:36,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:36,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:36,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:36,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:23:36,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763381666] [2021-02-19 17:23:36,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:36,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:36,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:36,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:36,494 INFO L87 Difference]: Start difference. First operand 1189 states and 3407 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:36,561 INFO L93 Difference]: Finished difference Result 1449 states and 3831 transitions. [2021-02-19 17:23:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:23:36,562 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:36,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:36,563 INFO L225 Difference]: With dead ends: 1449 [2021-02-19 17:23:36,563 INFO L226 Difference]: Without dead ends: 1449 [2021-02-19 17:23:36,563 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-02-19 17:23:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1136. [2021-02-19 17:23:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 2.845814977973568) internal successors, (3230), 1135 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3230 transitions. [2021-02-19 17:23:36,575 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3230 transitions. Word has length 19 [2021-02-19 17:23:36,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:36,575 INFO L480 AbstractCegarLoop]: Abstraction has 1136 states and 3230 transitions. [2021-02-19 17:23:36,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3230 transitions. [2021-02-19 17:23:36,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:36,576 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:36,577 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:36,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-02-19 17:23:36,777 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:36,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2081290605, now seen corresponding path program 110 times [2021-02-19 17:23:36,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:36,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436712907] [2021-02-19 17:23:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:36,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436712907] [2021-02-19 17:23:36,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161316813] [2021-02-19 17:23:36,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:36,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:36,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:36,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:36,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:36,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:36,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:23:36,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273226096] [2021-02-19 17:23:36,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:36,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:36,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:36,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:36,906 INFO L87 Difference]: Start difference. First operand 1136 states and 3230 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:36,968 INFO L93 Difference]: Finished difference Result 1670 states and 4515 transitions. [2021-02-19 17:23:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:23:36,968 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:36,970 INFO L225 Difference]: With dead ends: 1670 [2021-02-19 17:23:36,970 INFO L226 Difference]: Without dead ends: 1670 [2021-02-19 17:23:36,970 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:36,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-02-19 17:23:36,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1470. [2021-02-19 17:23:36,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.888359428182437) internal successors, (4243), 1469 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4243 transitions. [2021-02-19 17:23:36,995 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4243 transitions. Word has length 19 [2021-02-19 17:23:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:36,996 INFO L480 AbstractCegarLoop]: Abstraction has 1470 states and 4243 transitions. [2021-02-19 17:23:36,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:36,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4243 transitions. [2021-02-19 17:23:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:36,997 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:36,997 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:37,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2021-02-19 17:23:37,218 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:37,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1543435027, now seen corresponding path program 111 times [2021-02-19 17:23:37,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:37,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658713678] [2021-02-19 17:23:37,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:37,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658713678] [2021-02-19 17:23:37,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782494374] [2021-02-19 17:23:37,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:37,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:23:37,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:37,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:37,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:37,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:37,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:23:37,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098789819] [2021-02-19 17:23:37,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:37,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:37,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:37,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:37,336 INFO L87 Difference]: Start difference. First operand 1470 states and 4243 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:37,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:37,433 INFO L93 Difference]: Finished difference Result 1718 states and 4617 transitions. [2021-02-19 17:23:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:23:37,433 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:37,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:37,435 INFO L225 Difference]: With dead ends: 1718 [2021-02-19 17:23:37,435 INFO L226 Difference]: Without dead ends: 1718 [2021-02-19 17:23:37,435 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:23:37,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2021-02-19 17:23:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1404. [2021-02-19 17:23:37,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.879543834640057) internal successors, (4040), 1403 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:37,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4040 transitions. [2021-02-19 17:23:37,450 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4040 transitions. Word has length 19 [2021-02-19 17:23:37,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:37,450 INFO L480 AbstractCegarLoop]: Abstraction has 1404 states and 4040 transitions. [2021-02-19 17:23:37,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:37,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4040 transitions. [2021-02-19 17:23:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:37,452 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:37,452 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:37,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:37,652 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:37,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2049781293, now seen corresponding path program 112 times [2021-02-19 17:23:37,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:37,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010852496] [2021-02-19 17:23:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:37,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010852496] [2021-02-19 17:23:37,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460803084] [2021-02-19 17:23:37,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:37,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:37,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:37,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:37,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:37,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:37,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:23:37,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983263905] [2021-02-19 17:23:37,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:37,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:37,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:37,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:37,799 INFO L87 Difference]: Start difference. First operand 1404 states and 4040 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:37,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:37,989 INFO L93 Difference]: Finished difference Result 1961 states and 5383 transitions. [2021-02-19 17:23:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:37,989 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:37,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:37,992 INFO L225 Difference]: With dead ends: 1961 [2021-02-19 17:23:37,992 INFO L226 Difference]: Without dead ends: 1961 [2021-02-19 17:23:37,992 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:23:37,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-02-19 17:23:38,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1643. [2021-02-19 17:23:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.933617539585871) internal successors, (4817), 1642 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:38,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4817 transitions. [2021-02-19 17:23:38,015 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4817 transitions. Word has length 19 [2021-02-19 17:23:38,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:38,015 INFO L480 AbstractCegarLoop]: Abstraction has 1643 states and 4817 transitions. [2021-02-19 17:23:38,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4817 transitions. [2021-02-19 17:23:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:38,017 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:38,017 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:38,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-02-19 17:23:38,238 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:38,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:38,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1887508935, now seen corresponding path program 113 times [2021-02-19 17:23:38,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:38,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096360074] [2021-02-19 17:23:38,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:38,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096360074] [2021-02-19 17:23:38,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105756456] [2021-02-19 17:23:38,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:38,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:23:38,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:38,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:38,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:38,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:38,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:23:38,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85056307] [2021-02-19 17:23:38,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:38,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:38,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:38,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:38,346 INFO L87 Difference]: Start difference. First operand 1643 states and 4817 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:38,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:38,516 INFO L93 Difference]: Finished difference Result 1862 states and 5178 transitions. [2021-02-19 17:23:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:23:38,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:38,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:38,518 INFO L225 Difference]: With dead ends: 1862 [2021-02-19 17:23:38,518 INFO L226 Difference]: Without dead ends: 1856 [2021-02-19 17:23:38,518 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:23:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-02-19 17:23:38,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1674. [2021-02-19 17:23:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.9414225941422596) internal successors, (4921), 1673 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 4921 transitions. [2021-02-19 17:23:38,535 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 4921 transitions. Word has length 19 [2021-02-19 17:23:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:38,535 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 4921 transitions. [2021-02-19 17:23:38,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 4921 transitions. [2021-02-19 17:23:38,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:38,537 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:38,537 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:38,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable569,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:38,737 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:38,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1578626613, now seen corresponding path program 114 times [2021-02-19 17:23:38,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:38,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354515694] [2021-02-19 17:23:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:38,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354515694] [2021-02-19 17:23:38,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702220662] [2021-02-19 17:23:38,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:38,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:23:38,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:38,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:38,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:38,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:38,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:23:38,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396858687] [2021-02-19 17:23:38,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:38,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:38,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:38,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:38,847 INFO L87 Difference]: Start difference. First operand 1674 states and 4921 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:38,904 INFO L93 Difference]: Finished difference Result 1907 states and 5367 transitions. [2021-02-19 17:23:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:23:38,905 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:38,906 INFO L225 Difference]: With dead ends: 1907 [2021-02-19 17:23:38,906 INFO L226 Difference]: Without dead ends: 1907 [2021-02-19 17:23:38,906 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:38,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-02-19 17:23:38,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1673. [2021-02-19 17:23:38,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 2.9318181818181817) internal successors, (4902), 1672 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 4902 transitions. [2021-02-19 17:23:38,923 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 4902 transitions. Word has length 19 [2021-02-19 17:23:38,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:38,924 INFO L480 AbstractCegarLoop]: Abstraction has 1673 states and 4902 transitions. [2021-02-19 17:23:38,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:38,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 4902 transitions. [2021-02-19 17:23:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:38,925 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:38,925 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:39,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:39,129 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:39,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1040771035, now seen corresponding path program 115 times [2021-02-19 17:23:39,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:39,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124516939] [2021-02-19 17:23:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:39,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124516939] [2021-02-19 17:23:39,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335296924] [2021-02-19 17:23:39,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:39,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:39,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:39,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:39,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:23:39,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977298226] [2021-02-19 17:23:39,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:39,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:39,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:39,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:39,251 INFO L87 Difference]: Start difference. First operand 1673 states and 4902 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:39,372 INFO L93 Difference]: Finished difference Result 1965 states and 5492 transitions. [2021-02-19 17:23:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:23:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:39,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:39,374 INFO L225 Difference]: With dead ends: 1965 [2021-02-19 17:23:39,374 INFO L226 Difference]: Without dead ends: 1965 [2021-02-19 17:23:39,374 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:23:39,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-02-19 17:23:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1412. [2021-02-19 17:23:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.888731396172927) internal successors, (4076), 1411 states have internal predecessors, (4076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4076 transitions. [2021-02-19 17:23:39,390 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4076 transitions. Word has length 19 [2021-02-19 17:23:39,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:39,390 INFO L480 AbstractCegarLoop]: Abstraction has 1412 states and 4076 transitions. [2021-02-19 17:23:39,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4076 transitions. [2021-02-19 17:23:39,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:39,391 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:39,391 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:39,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:39,592 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:39,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:39,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1547117301, now seen corresponding path program 116 times [2021-02-19 17:23:39,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:39,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379437512] [2021-02-19 17:23:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:39,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379437512] [2021-02-19 17:23:39,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203066090] [2021-02-19 17:23:39,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:39,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:39,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:39,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:39,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:39,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:39,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:23:39,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622371226] [2021-02-19 17:23:39,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:39,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:39,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:39,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:39,704 INFO L87 Difference]: Start difference. First operand 1412 states and 4076 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:39,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:39,864 INFO L93 Difference]: Finished difference Result 1975 states and 5352 transitions. [2021-02-19 17:23:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:39,865 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:39,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:39,866 INFO L225 Difference]: With dead ends: 1975 [2021-02-19 17:23:39,867 INFO L226 Difference]: Without dead ends: 1975 [2021-02-19 17:23:39,867 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:23:39,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-02-19 17:23:39,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1385. [2021-02-19 17:23:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 2.9010115606936417) internal successors, (4015), 1384 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 4015 transitions. [2021-02-19 17:23:39,883 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 4015 transitions. Word has length 19 [2021-02-19 17:23:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:39,883 INFO L480 AbstractCegarLoop]: Abstraction has 1385 states and 4015 transitions. [2021-02-19 17:23:39,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 4015 transitions. [2021-02-19 17:23:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:39,885 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:39,885 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:40,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:40,090 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:40,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:40,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1307333147, now seen corresponding path program 117 times [2021-02-19 17:23:40,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:40,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649561454] [2021-02-19 17:23:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:40,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649561454] [2021-02-19 17:23:40,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045307265] [2021-02-19 17:23:40,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:40,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:23:40,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:40,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:40,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:40,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:40,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:40,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850127461] [2021-02-19 17:23:40,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:40,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:40,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:40,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:40,189 INFO L87 Difference]: Start difference. First operand 1385 states and 4015 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:40,314 INFO L93 Difference]: Finished difference Result 1517 states and 4176 transitions. [2021-02-19 17:23:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:40,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:40,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:40,316 INFO L225 Difference]: With dead ends: 1517 [2021-02-19 17:23:40,316 INFO L226 Difference]: Without dead ends: 1513 [2021-02-19 17:23:40,316 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:40,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-02-19 17:23:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1380. [2021-02-19 17:23:40,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.897026831036983) internal successors, (3995), 1379 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3995 transitions. [2021-02-19 17:23:40,330 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3995 transitions. Word has length 19 [2021-02-19 17:23:40,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:40,330 INFO L480 AbstractCegarLoop]: Abstraction has 1380 states and 3995 transitions. [2021-02-19 17:23:40,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:40,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3995 transitions. [2021-02-19 17:23:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:40,332 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:40,332 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:40,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-02-19 17:23:40,552 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:40,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:40,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2111383141, now seen corresponding path program 118 times [2021-02-19 17:23:40,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:40,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533106293] [2021-02-19 17:23:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:40,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533106293] [2021-02-19 17:23:40,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024612300] [2021-02-19 17:23:40,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:40,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:40,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:40,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:40,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:40,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-02-19 17:23:40,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017029152] [2021-02-19 17:23:40,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:40,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:40,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:40,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:40,701 INFO L87 Difference]: Start difference. First operand 1380 states and 3995 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:40,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:40,878 INFO L93 Difference]: Finished difference Result 1622 states and 4384 transitions. [2021-02-19 17:23:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:40,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:40,881 INFO L225 Difference]: With dead ends: 1622 [2021-02-19 17:23:40,881 INFO L226 Difference]: Without dead ends: 1622 [2021-02-19 17:23:40,881 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:23:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-02-19 17:23:40,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1221. [2021-02-19 17:23:40,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.8721311475409834) internal successors, (3504), 1220 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3504 transitions. [2021-02-19 17:23:40,897 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3504 transitions. Word has length 19 [2021-02-19 17:23:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:40,898 INFO L480 AbstractCegarLoop]: Abstraction has 1221 states and 3504 transitions. [2021-02-19 17:23:40,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3504 transitions. [2021-02-19 17:23:40,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:40,899 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:40,899 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:41,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-02-19 17:23:41,121 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:41,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:41,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1410392569, now seen corresponding path program 119 times [2021-02-19 17:23:41,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:41,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585571115] [2021-02-19 17:23:41,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:41,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585571115] [2021-02-19 17:23:41,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946644943] [2021-02-19 17:23:41,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:41,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:23:41,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:41,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:41,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:41,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:41,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:41,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51015989] [2021-02-19 17:23:41,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:41,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:41,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:41,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:41,208 INFO L87 Difference]: Start difference. First operand 1221 states and 3504 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:41,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:41,325 INFO L93 Difference]: Finished difference Result 1376 states and 3711 transitions. [2021-02-19 17:23:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:41,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:41,327 INFO L225 Difference]: With dead ends: 1376 [2021-02-19 17:23:41,327 INFO L226 Difference]: Without dead ends: 1372 [2021-02-19 17:23:41,327 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:41,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-02-19 17:23:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1231. [2021-02-19 17:23:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.873170731707317) internal successors, (3534), 1230 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3534 transitions. [2021-02-19 17:23:41,368 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3534 transitions. Word has length 19 [2021-02-19 17:23:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:41,369 INFO L480 AbstractCegarLoop]: Abstraction has 1231 states and 3534 transitions. [2021-02-19 17:23:41,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3534 transitions. [2021-02-19 17:23:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:41,370 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:41,370 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:41,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-02-19 17:23:41,586 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:41,586 INFO L82 PathProgramCache]: Analyzing trace with hash 307356491, now seen corresponding path program 120 times [2021-02-19 17:23:41,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:41,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672564067] [2021-02-19 17:23:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:41,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672564067] [2021-02-19 17:23:41,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578217655] [2021-02-19 17:23:41,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:41,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:23:41,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:41,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:41,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:41,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:41,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:41,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817016624] [2021-02-19 17:23:41,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:41,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:41,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:41,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:41,707 INFO L87 Difference]: Start difference. First operand 1231 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:41,779 INFO L93 Difference]: Finished difference Result 1459 states and 3899 transitions. [2021-02-19 17:23:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:23:41,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:41,780 INFO L225 Difference]: With dead ends: 1459 [2021-02-19 17:23:41,780 INFO L226 Difference]: Without dead ends: 1459 [2021-02-19 17:23:41,781 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:41,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-02-19 17:23:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1232. [2021-02-19 17:23:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 2.8732737611697807) internal successors, (3537), 1231 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 3537 transitions. [2021-02-19 17:23:41,793 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 3537 transitions. Word has length 19 [2021-02-19 17:23:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:41,793 INFO L480 AbstractCegarLoop]: Abstraction has 1232 states and 3537 transitions. [2021-02-19 17:23:41,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 3537 transitions. [2021-02-19 17:23:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:41,797 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:41,798 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:42,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-02-19 17:23:42,014 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:42,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:42,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1421690843, now seen corresponding path program 121 times [2021-02-19 17:23:42,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:42,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209737126] [2021-02-19 17:23:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:42,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209737126] [2021-02-19 17:23:42,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565165903] [2021-02-19 17:23:42,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:42,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:42,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:42,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:42,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-02-19 17:23:42,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480124838] [2021-02-19 17:23:42,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:42,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:42,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:42,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:42,117 INFO L87 Difference]: Start difference. First operand 1232 states and 3537 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:42,199 INFO L93 Difference]: Finished difference Result 1479 states and 3939 transitions. [2021-02-19 17:23:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:42,200 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:42,201 INFO L225 Difference]: With dead ends: 1479 [2021-02-19 17:23:42,201 INFO L226 Difference]: Without dead ends: 1479 [2021-02-19 17:23:42,201 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-02-19 17:23:42,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1233. [2021-02-19 17:23:42,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 2.8733766233766236) internal successors, (3540), 1232 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:42,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 3540 transitions. [2021-02-19 17:23:42,213 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 3540 transitions. Word has length 19 [2021-02-19 17:23:42,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:42,213 INFO L480 AbstractCegarLoop]: Abstraction has 1233 states and 3540 transitions. [2021-02-19 17:23:42,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 3540 transitions. [2021-02-19 17:23:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:42,215 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:42,215 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:42,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:42,416 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:42,416 INFO L82 PathProgramCache]: Analyzing trace with hash 812416651, now seen corresponding path program 122 times [2021-02-19 17:23:42,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:42,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188632183] [2021-02-19 17:23:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:42,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188632183] [2021-02-19 17:23:42,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303276349] [2021-02-19 17:23:42,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:42,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:42,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:42,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:42,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:42,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:42,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-02-19 17:23:42,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245547296] [2021-02-19 17:23:42,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:42,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:42,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:42,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:42,525 INFO L87 Difference]: Start difference. First operand 1233 states and 3540 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:42,609 INFO L93 Difference]: Finished difference Result 1443 states and 3863 transitions. [2021-02-19 17:23:42,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:23:42,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:42,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:42,610 INFO L225 Difference]: With dead ends: 1443 [2021-02-19 17:23:42,610 INFO L226 Difference]: Without dead ends: 1443 [2021-02-19 17:23:42,610 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:42,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-02-19 17:23:42,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1226. [2021-02-19 17:23:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.874285714285714) internal successors, (3521), 1225 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3521 transitions. [2021-02-19 17:23:42,623 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3521 transitions. Word has length 19 [2021-02-19 17:23:42,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:42,623 INFO L480 AbstractCegarLoop]: Abstraction has 1226 states and 3521 transitions. [2021-02-19 17:23:42,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:42,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3521 transitions. [2021-02-19 17:23:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:42,624 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:42,624 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:42,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-02-19 17:23:42,825 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:42,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:42,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1350272229, now seen corresponding path program 123 times [2021-02-19 17:23:42,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:42,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069832016] [2021-02-19 17:23:42,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:42,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069832016] [2021-02-19 17:23:42,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113161931] [2021-02-19 17:23:42,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:42,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:23:42,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:42,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:42,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:42,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:42,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-02-19 17:23:42,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857447342] [2021-02-19 17:23:42,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:42,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:42,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:42,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:42,961 INFO L87 Difference]: Start difference. First operand 1226 states and 3521 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:43,031 INFO L93 Difference]: Finished difference Result 1646 states and 4470 transitions. [2021-02-19 17:23:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:23:43,031 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:43,033 INFO L225 Difference]: With dead ends: 1646 [2021-02-19 17:23:43,033 INFO L226 Difference]: Without dead ends: 1646 [2021-02-19 17:23:43,033 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:23:43,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-02-19 17:23:43,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1435. [2021-02-19 17:23:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 2.8870292887029287) internal successors, (4140), 1434 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4140 transitions. [2021-02-19 17:23:43,046 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4140 transitions. Word has length 19 [2021-02-19 17:23:43,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:43,047 INFO L480 AbstractCegarLoop]: Abstraction has 1435 states and 4140 transitions. [2021-02-19 17:23:43,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4140 transitions. [2021-02-19 17:23:43,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:43,048 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:43,048 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:43,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-02-19 17:23:43,249 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:43,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:43,250 INFO L82 PathProgramCache]: Analyzing trace with hash 843925963, now seen corresponding path program 124 times [2021-02-19 17:23:43,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:43,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056503306] [2021-02-19 17:23:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:43,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056503306] [2021-02-19 17:23:43,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027290583] [2021-02-19 17:23:43,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:43,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:43,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:43,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:43,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:43,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:43,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-02-19 17:23:43,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788161132] [2021-02-19 17:23:43,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:43,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:43,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:43,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:43,372 INFO L87 Difference]: Start difference. First operand 1435 states and 4140 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:43,509 INFO L93 Difference]: Finished difference Result 1661 states and 4495 transitions. [2021-02-19 17:23:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:23:43,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:43,512 INFO L225 Difference]: With dead ends: 1661 [2021-02-19 17:23:43,512 INFO L226 Difference]: Without dead ends: 1661 [2021-02-19 17:23:43,514 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:23:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-02-19 17:23:43,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1435. [2021-02-19 17:23:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 2.8870292887029287) internal successors, (4140), 1434 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4140 transitions. [2021-02-19 17:23:43,537 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4140 transitions. Word has length 19 [2021-02-19 17:23:43,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:43,537 INFO L480 AbstractCegarLoop]: Abstraction has 1435 states and 4140 transitions. [2021-02-19 17:23:43,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:43,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4140 transitions. [2021-02-19 17:23:43,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:43,539 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:43,539 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:43,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:43,760 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:43,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:43,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1967906395, now seen corresponding path program 125 times [2021-02-19 17:23:43,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:43,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009397857] [2021-02-19 17:23:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:43,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009397857] [2021-02-19 17:23:43,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017249735] [2021-02-19 17:23:43,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:43,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:23:43,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:43,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:43,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:43,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:43,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-02-19 17:23:43,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685401538] [2021-02-19 17:23:43,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:43,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:43,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:43,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:43,890 INFO L87 Difference]: Start difference. First operand 1435 states and 4140 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:44,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:44,094 INFO L93 Difference]: Finished difference Result 1853 states and 5030 transitions. [2021-02-19 17:23:44,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:23:44,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:44,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:44,096 INFO L225 Difference]: With dead ends: 1853 [2021-02-19 17:23:44,096 INFO L226 Difference]: Without dead ends: 1853 [2021-02-19 17:23:44,096 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:23:44,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-02-19 17:23:44,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1564. [2021-02-19 17:23:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 2.9021113243762) internal successors, (4536), 1563 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 4536 transitions. [2021-02-19 17:23:44,115 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 4536 transitions. Word has length 19 [2021-02-19 17:23:44,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:44,115 INFO L480 AbstractCegarLoop]: Abstraction has 1564 states and 4536 transitions. [2021-02-19 17:23:44,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:44,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 4536 transitions. [2021-02-19 17:23:44,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:44,117 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:44,117 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:44,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:44,334 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:44,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:44,334 INFO L82 PathProgramCache]: Analyzing trace with hash 290223503, now seen corresponding path program 126 times [2021-02-19 17:23:44,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:44,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396338086] [2021-02-19 17:23:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:44,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396338086] [2021-02-19 17:23:44,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892152232] [2021-02-19 17:23:44,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:44,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:23:44,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:44,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:44,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:44,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:44,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-02-19 17:23:44,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112186677] [2021-02-19 17:23:44,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:44,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:44,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:44,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:44,473 INFO L87 Difference]: Start difference. First operand 1564 states and 4536 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:44,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:44,657 INFO L93 Difference]: Finished difference Result 1749 states and 4790 transitions. [2021-02-19 17:23:44,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:23:44,657 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:44,659 INFO L225 Difference]: With dead ends: 1749 [2021-02-19 17:23:44,659 INFO L226 Difference]: Without dead ends: 1743 [2021-02-19 17:23:44,659 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:23:44,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-02-19 17:23:44,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1529. [2021-02-19 17:23:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.8841623036649215) internal successors, (4407), 1528 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:44,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4407 transitions. [2021-02-19 17:23:44,675 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4407 transitions. Word has length 19 [2021-02-19 17:23:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:44,675 INFO L480 AbstractCegarLoop]: Abstraction has 1529 states and 4407 transitions. [2021-02-19 17:23:44,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4407 transitions. [2021-02-19 17:23:44,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:44,676 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:44,676 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:44,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:44,877 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:44,877 INFO L82 PathProgramCache]: Analyzing trace with hash -247013203, now seen corresponding path program 127 times [2021-02-19 17:23:44,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:44,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121790347] [2021-02-19 17:23:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:44,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121790347] [2021-02-19 17:23:44,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765844961] [2021-02-19 17:23:44,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:44,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:44,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:45,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:45,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-02-19 17:23:45,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039917330] [2021-02-19 17:23:45,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:45,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:45,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:45,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:45,004 INFO L87 Difference]: Start difference. First operand 1529 states and 4407 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:45,154 INFO L93 Difference]: Finished difference Result 1732 states and 4850 transitions. [2021-02-19 17:23:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:23:45,154 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:45,156 INFO L225 Difference]: With dead ends: 1732 [2021-02-19 17:23:45,156 INFO L226 Difference]: Without dead ends: 1732 [2021-02-19 17:23:45,157 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:23:45,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-02-19 17:23:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1596. [2021-02-19 17:23:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 2.889655172413793) internal successors, (4609), 1595 states have internal predecessors, (4609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:45,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 4609 transitions. [2021-02-19 17:23:45,173 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 4609 transitions. Word has length 19 [2021-02-19 17:23:45,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:45,174 INFO L480 AbstractCegarLoop]: Abstraction has 1596 states and 4609 transitions. [2021-02-19 17:23:45,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 4609 transitions. [2021-02-19 17:23:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:45,175 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:45,175 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:45,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:45,389 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:45,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:45,390 INFO L82 PathProgramCache]: Analyzing trace with hash -753359469, now seen corresponding path program 128 times [2021-02-19 17:23:45,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:45,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599521889] [2021-02-19 17:23:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:45,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599521889] [2021-02-19 17:23:45,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57666394] [2021-02-19 17:23:45,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:45,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:45,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:45,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:45,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:45,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:45,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-02-19 17:23:45,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602405001] [2021-02-19 17:23:45,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:23:45,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:45,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:23:45,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:45,523 INFO L87 Difference]: Start difference. First operand 1596 states and 4609 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:45,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:45,770 INFO L93 Difference]: Finished difference Result 1746 states and 4863 transitions. [2021-02-19 17:23:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:23:45,771 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:45,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:45,772 INFO L225 Difference]: With dead ends: 1746 [2021-02-19 17:23:45,772 INFO L226 Difference]: Without dead ends: 1746 [2021-02-19 17:23:45,772 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:23:45,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-02-19 17:23:45,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1507. [2021-02-19 17:23:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 2.8771580345285526) internal successors, (4333), 1506 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 4333 transitions. [2021-02-19 17:23:45,787 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 4333 transitions. Word has length 19 [2021-02-19 17:23:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:45,787 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 4333 transitions. [2021-02-19 17:23:45,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:45,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 4333 transitions. [2021-02-19 17:23:45,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:45,788 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:45,788 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:45,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-02-19 17:23:45,989 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:45,989 INFO L82 PathProgramCache]: Analyzing trace with hash 729775469, now seen corresponding path program 129 times [2021-02-19 17:23:45,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:45,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914030380] [2021-02-19 17:23:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:46,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914030380] [2021-02-19 17:23:46,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995672042] [2021-02-19 17:23:46,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:46,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:23:46,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:46,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:46,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:46,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:46,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-02-19 17:23:46,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110278061] [2021-02-19 17:23:46,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:23:46,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:46,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:23:46,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:46,128 INFO L87 Difference]: Start difference. First operand 1507 states and 4333 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:46,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:46,393 INFO L93 Difference]: Finished difference Result 1884 states and 5161 transitions. [2021-02-19 17:23:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:23:46,393 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:46,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:46,395 INFO L225 Difference]: With dead ends: 1884 [2021-02-19 17:23:46,395 INFO L226 Difference]: Without dead ends: 1884 [2021-02-19 17:23:46,395 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:23:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-02-19 17:23:46,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1484. [2021-02-19 17:23:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.8792987188132164) internal successors, (4270), 1483 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4270 transitions. [2021-02-19 17:23:46,410 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4270 transitions. Word has length 19 [2021-02-19 17:23:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:46,410 INFO L480 AbstractCegarLoop]: Abstraction has 1484 states and 4270 transitions. [2021-02-19 17:23:46,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4270 transitions. [2021-02-19 17:23:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:46,411 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:46,411 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:46,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable585,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:46,611 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:46,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1160254573, now seen corresponding path program 130 times [2021-02-19 17:23:46,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:46,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324362429] [2021-02-19 17:23:46,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:46,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324362429] [2021-02-19 17:23:46,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130003989] [2021-02-19 17:23:46,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:46,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:46,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:46,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:46,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:46,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:46,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-02-19 17:23:46,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17002362] [2021-02-19 17:23:46,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:46,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:46,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:46,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:46,737 INFO L87 Difference]: Start difference. First operand 1484 states and 4270 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:46,909 INFO L93 Difference]: Finished difference Result 1607 states and 4421 transitions. [2021-02-19 17:23:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:23:46,909 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:46,910 INFO L225 Difference]: With dead ends: 1607 [2021-02-19 17:23:46,910 INFO L226 Difference]: Without dead ends: 1603 [2021-02-19 17:23:46,910 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:23:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-02-19 17:23:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1484. [2021-02-19 17:23:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.8772757923128793) internal successors, (4267), 1483 states have internal predecessors, (4267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4267 transitions. [2021-02-19 17:23:46,927 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4267 transitions. Word has length 19 [2021-02-19 17:23:46,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:46,928 INFO L480 AbstractCegarLoop]: Abstraction has 1484 states and 4267 transitions. [2021-02-19 17:23:46,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:46,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4267 transitions. [2021-02-19 17:23:46,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:46,929 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:46,930 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:47,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-02-19 17:23:47,146 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:47,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:47,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1820827821, now seen corresponding path program 131 times [2021-02-19 17:23:47,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:47,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683123924] [2021-02-19 17:23:47,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:47,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683123924] [2021-02-19 17:23:47,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207199117] [2021-02-19 17:23:47,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:47,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:23:47,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:47,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:47,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:47,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:47,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-02-19 17:23:47,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986412273] [2021-02-19 17:23:47,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:23:47,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:47,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:23:47,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:47,292 INFO L87 Difference]: Start difference. First operand 1484 states and 4267 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:47,532 INFO L93 Difference]: Finished difference Result 1883 states and 5198 transitions. [2021-02-19 17:23:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:23:47,532 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:47,534 INFO L225 Difference]: With dead ends: 1883 [2021-02-19 17:23:47,534 INFO L226 Difference]: Without dead ends: 1883 [2021-02-19 17:23:47,534 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=331, Invalid=725, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:23:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-02-19 17:23:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1685. [2021-02-19 17:23:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 2.8966745843230406) internal successors, (4878), 1684 states have internal predecessors, (4878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 4878 transitions. [2021-02-19 17:23:47,550 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 4878 transitions. Word has length 19 [2021-02-19 17:23:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:47,550 INFO L480 AbstractCegarLoop]: Abstraction has 1685 states and 4878 transitions. [2021-02-19 17:23:47,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 4878 transitions. [2021-02-19 17:23:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:47,552 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:47,552 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:47,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-02-19 17:23:47,752 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:47,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:47,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1899780849, now seen corresponding path program 132 times [2021-02-19 17:23:47,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:47,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100765969] [2021-02-19 17:23:47,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:47,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100765969] [2021-02-19 17:23:47,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576544857] [2021-02-19 17:23:47,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:47,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:23:47,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:47,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:47,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:47,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:47,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-02-19 17:23:47,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294859873] [2021-02-19 17:23:47,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:47,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:47,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:47,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:47,879 INFO L87 Difference]: Start difference. First operand 1685 states and 4878 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:48,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:48,012 INFO L93 Difference]: Finished difference Result 1804 states and 5036 transitions. [2021-02-19 17:23:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:23:48,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:48,014 INFO L225 Difference]: With dead ends: 1804 [2021-02-19 17:23:48,014 INFO L226 Difference]: Without dead ends: 1802 [2021-02-19 17:23:48,015 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:23:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-02-19 17:23:48,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1697. [2021-02-19 17:23:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 2.8985849056603774) internal successors, (4916), 1696 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 4916 transitions. [2021-02-19 17:23:48,038 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 4916 transitions. Word has length 19 [2021-02-19 17:23:48,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:48,038 INFO L480 AbstractCegarLoop]: Abstraction has 1697 states and 4916 transitions. [2021-02-19 17:23:48,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 4916 transitions. [2021-02-19 17:23:48,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:48,039 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:48,039 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:48,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-02-19 17:23:48,240 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:48,240 INFO L82 PathProgramCache]: Analyzing trace with hash -182031789, now seen corresponding path program 133 times [2021-02-19 17:23:48,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:48,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100869098] [2021-02-19 17:23:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:48,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100869098] [2021-02-19 17:23:48,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431842623] [2021-02-19 17:23:48,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:48,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:48,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:48,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:48,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-02-19 17:23:48,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029159728] [2021-02-19 17:23:48,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:48,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:48,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:48,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:48,368 INFO L87 Difference]: Start difference. First operand 1697 states and 4916 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:48,486 INFO L93 Difference]: Finished difference Result 1866 states and 5178 transitions. [2021-02-19 17:23:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:48,486 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:48,488 INFO L225 Difference]: With dead ends: 1866 [2021-02-19 17:23:48,488 INFO L226 Difference]: Without dead ends: 1866 [2021-02-19 17:23:48,488 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:23:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-02-19 17:23:48,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1698. [2021-02-19 17:23:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 2.897466116676488) internal successors, (4917), 1697 states have internal predecessors, (4917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:48,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 4917 transitions. [2021-02-19 17:23:48,511 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 4917 transitions. Word has length 19 [2021-02-19 17:23:48,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:48,511 INFO L480 AbstractCegarLoop]: Abstraction has 1698 states and 4917 transitions. [2021-02-19 17:23:48,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:48,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 4917 transitions. [2021-02-19 17:23:48,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:48,513 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:48,513 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:48,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:48,726 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:48,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1911079123, now seen corresponding path program 134 times [2021-02-19 17:23:48,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:48,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673849818] [2021-02-19 17:23:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:48,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673849818] [2021-02-19 17:23:48,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225810568] [2021-02-19 17:23:48,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:48,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:48,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:48,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:48,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:48,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:48,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-02-19 17:23:48,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678096493] [2021-02-19 17:23:48,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:23:48,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:48,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:23:48,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:48,867 INFO L87 Difference]: Start difference. First operand 1698 states and 4917 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:49,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:49,028 INFO L93 Difference]: Finished difference Result 1913 states and 5283 transitions. [2021-02-19 17:23:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:23:49,029 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:49,031 INFO L225 Difference]: With dead ends: 1913 [2021-02-19 17:23:49,031 INFO L226 Difference]: Without dead ends: 1913 [2021-02-19 17:23:49,031 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:23:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-02-19 17:23:49,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1700. [2021-02-19 17:23:49,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 2.896409652736904) internal successors, (4921), 1699 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:49,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4921 transitions. [2021-02-19 17:23:49,047 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4921 transitions. Word has length 19 [2021-02-19 17:23:49,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:49,047 INFO L480 AbstractCegarLoop]: Abstraction has 1700 states and 4921 transitions. [2021-02-19 17:23:49,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:49,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4921 transitions. [2021-02-19 17:23:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:49,058 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:49,058 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:49,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-02-19 17:23:49,275 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:49,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:49,275 INFO L82 PathProgramCache]: Analyzing trace with hash 323028371, now seen corresponding path program 135 times [2021-02-19 17:23:49,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:49,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018178814] [2021-02-19 17:23:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:49,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018178814] [2021-02-19 17:23:49,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624487545] [2021-02-19 17:23:49,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:49,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:23:49,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:49,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:49,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:49,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:49,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-02-19 17:23:49,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668310480] [2021-02-19 17:23:49,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:23:49,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:49,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:23:49,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:23:49,418 INFO L87 Difference]: Start difference. First operand 1700 states and 4921 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:49,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:49,624 INFO L93 Difference]: Finished difference Result 2111 states and 5864 transitions. [2021-02-19 17:23:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:23:49,625 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:49,627 INFO L225 Difference]: With dead ends: 2111 [2021-02-19 17:23:49,627 INFO L226 Difference]: Without dead ends: 2111 [2021-02-19 17:23:49,627 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:23:49,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-02-19 17:23:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1895. [2021-02-19 17:23:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1894 states have (on average 2.9123548046462515) internal successors, (5516), 1894 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 5516 transitions. [2021-02-19 17:23:49,654 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 5516 transitions. Word has length 19 [2021-02-19 17:23:49,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:49,654 INFO L480 AbstractCegarLoop]: Abstraction has 1895 states and 5516 transitions. [2021-02-19 17:23:49,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:49,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 5516 transitions. [2021-02-19 17:23:49,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:49,656 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:49,656 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:49,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:49,870 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:49,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:49,870 INFO L82 PathProgramCache]: Analyzing trace with hash 860883949, now seen corresponding path program 136 times [2021-02-19 17:23:49,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:49,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626544354] [2021-02-19 17:23:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:49,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626544354] [2021-02-19 17:23:49,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365702859] [2021-02-19 17:23:49,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:49,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:49,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:49,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:49,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:50,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:50,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-02-19 17:23:50,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925048893] [2021-02-19 17:23:50,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:23:50,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:50,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:23:50,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:50,018 INFO L87 Difference]: Start difference. First operand 1895 states and 5516 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:50,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:50,204 INFO L93 Difference]: Finished difference Result 2071 states and 5772 transitions. [2021-02-19 17:23:50,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:23:50,205 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:50,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:50,207 INFO L225 Difference]: With dead ends: 2071 [2021-02-19 17:23:50,207 INFO L226 Difference]: Without dead ends: 2071 [2021-02-19 17:23:50,207 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:23:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-02-19 17:23:50,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1876. [2021-02-19 17:23:50,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.9082666666666666) internal successors, (5453), 1875 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5453 transitions. [2021-02-19 17:23:50,226 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5453 transitions. Word has length 19 [2021-02-19 17:23:50,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:50,226 INFO L480 AbstractCegarLoop]: Abstraction has 1876 states and 5453 transitions. [2021-02-19 17:23:50,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5453 transitions. [2021-02-19 17:23:50,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:50,228 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:50,228 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:50,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:50,429 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:50,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:50,429 INFO L82 PathProgramCache]: Analyzing trace with hash 354537683, now seen corresponding path program 137 times [2021-02-19 17:23:50,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:50,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749949907] [2021-02-19 17:23:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:50,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749949907] [2021-02-19 17:23:50,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621771267] [2021-02-19 17:23:50,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:50,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:23:50,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:50,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:50,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:50,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:50,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-02-19 17:23:50,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401754526] [2021-02-19 17:23:50,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:23:50,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:50,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:23:50,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:50,571 INFO L87 Difference]: Start difference. First operand 1876 states and 5453 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:50,750 INFO L93 Difference]: Finished difference Result 2136 states and 6078 transitions. [2021-02-19 17:23:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:50,750 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:50,752 INFO L225 Difference]: With dead ends: 2136 [2021-02-19 17:23:50,752 INFO L226 Difference]: Without dead ends: 2136 [2021-02-19 17:23:50,752 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:23:50,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-02-19 17:23:50,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2034. [2021-02-19 17:23:50,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.9188391539596656) internal successors, (5934), 2033 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5934 transitions. [2021-02-19 17:23:50,770 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5934 transitions. Word has length 19 [2021-02-19 17:23:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:50,771 INFO L480 AbstractCegarLoop]: Abstraction has 2034 states and 5934 transitions. [2021-02-19 17:23:50,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5934 transitions. [2021-02-19 17:23:50,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:50,772 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:50,772 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:50,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:50,973 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:50,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:50,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1837672621, now seen corresponding path program 138 times [2021-02-19 17:23:50,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:50,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72781842] [2021-02-19 17:23:50,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:51,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72781842] [2021-02-19 17:23:51,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742585383] [2021-02-19 17:23:51,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:51,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:23:51,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:51,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:51,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:51,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:51,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-02-19 17:23:51,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424561949] [2021-02-19 17:23:51,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:23:51,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:51,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:23:51,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:23:51,128 INFO L87 Difference]: Start difference. First operand 2034 states and 5934 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:51,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:51,330 INFO L93 Difference]: Finished difference Result 2171 states and 6166 transitions. [2021-02-19 17:23:51,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:51,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:51,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:51,333 INFO L225 Difference]: With dead ends: 2171 [2021-02-19 17:23:51,333 INFO L226 Difference]: Without dead ends: 2171 [2021-02-19 17:23:51,333 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:23:51,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-02-19 17:23:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2028. [2021-02-19 17:23:51,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.9181055747409967) internal successors, (5915), 2027 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5915 transitions. [2021-02-19 17:23:51,351 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5915 transitions. Word has length 19 [2021-02-19 17:23:51,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:51,351 INFO L480 AbstractCegarLoop]: Abstraction has 2028 states and 5915 transitions. [2021-02-19 17:23:51,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:51,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5915 transitions. [2021-02-19 17:23:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:23:51,353 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:51,353 INFO L506 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:51,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:51,553 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:51,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:51,554 INFO L82 PathProgramCache]: Analyzing trace with hash 570215443, now seen corresponding path program 139 times [2021-02-19 17:23:51,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:51,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615715582] [2021-02-19 17:23:51,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:51,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615715582] [2021-02-19 17:23:51,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829151676] [2021-02-19 17:23:51,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:51,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:51,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:51,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:51,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-02-19 17:23:51,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909073549] [2021-02-19 17:23:51,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:23:51,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:51,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:23:51,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:51,730 INFO L87 Difference]: Start difference. First operand 2028 states and 5915 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:52,048 INFO L93 Difference]: Finished difference Result 2447 states and 6973 transitions. [2021-02-19 17:23:52,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:23:52,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:23:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:52,051 INFO L225 Difference]: With dead ends: 2447 [2021-02-19 17:23:52,051 INFO L226 Difference]: Without dead ends: 2447 [2021-02-19 17:23:52,051 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=495, Invalid=1145, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:23:52,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-02-19 17:23:52,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2072. [2021-02-19 17:23:52,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.920328343795268) internal successors, (6048), 2071 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6048 transitions. [2021-02-19 17:23:52,071 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6048 transitions. Word has length 19 [2021-02-19 17:23:52,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:52,071 INFO L480 AbstractCegarLoop]: Abstraction has 2072 states and 6048 transitions. [2021-02-19 17:23:52,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6048 transitions. [2021-02-19 17:23:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:52,072 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:52,073 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:52,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:52,273 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:52,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:52,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1344383686, now seen corresponding path program 140 times [2021-02-19 17:23:52,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:52,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212337350] [2021-02-19 17:23:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:52,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212337350] [2021-02-19 17:23:52,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214637296] [2021-02-19 17:23:52,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:52,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:52,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:52,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:52,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:52,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:52,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-02-19 17:23:52,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420251211] [2021-02-19 17:23:52,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:52,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:52,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:52,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:52,399 INFO L87 Difference]: Start difference. First operand 2072 states and 6048 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:52,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:52,539 INFO L93 Difference]: Finished difference Result 2203 states and 6267 transitions. [2021-02-19 17:23:52,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:52,540 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:52,541 INFO L225 Difference]: With dead ends: 2203 [2021-02-19 17:23:52,542 INFO L226 Difference]: Without dead ends: 2199 [2021-02-19 17:23:52,542 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:23:52,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-02-19 17:23:52,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2069. [2021-02-19 17:23:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.9192456479690523) internal successors, (6037), 2068 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 6037 transitions. [2021-02-19 17:23:52,560 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 6037 transitions. Word has length 20 [2021-02-19 17:23:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:52,560 INFO L480 AbstractCegarLoop]: Abstraction has 2069 states and 6037 transitions. [2021-02-19 17:23:52,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 6037 transitions. [2021-02-19 17:23:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:52,561 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:52,561 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:52,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-02-19 17:23:52,762 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:52,762 INFO L82 PathProgramCache]: Analyzing trace with hash 187531722, now seen corresponding path program 141 times [2021-02-19 17:23:52,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:52,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241077090] [2021-02-19 17:23:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:52,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241077090] [2021-02-19 17:23:52,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586091441] [2021-02-19 17:23:52,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:52,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:23:52,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:52,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:23:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:52,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:52,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:52,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847293683] [2021-02-19 17:23:52,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:52,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:52,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:52,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:52,875 INFO L87 Difference]: Start difference. First operand 2069 states and 6037 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:52,945 INFO L93 Difference]: Finished difference Result 2256 states and 6332 transitions. [2021-02-19 17:23:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:23:52,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:52,947 INFO L225 Difference]: With dead ends: 2256 [2021-02-19 17:23:52,947 INFO L226 Difference]: Without dead ends: 2254 [2021-02-19 17:23:52,947 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:52,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-02-19 17:23:52,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2079. [2021-02-19 17:23:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 2.9181905678537055) internal successors, (6064), 2078 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:52,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 6064 transitions. [2021-02-19 17:23:52,967 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 6064 transitions. Word has length 20 [2021-02-19 17:23:52,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:52,967 INFO L480 AbstractCegarLoop]: Abstraction has 2079 states and 6064 transitions. [2021-02-19 17:23:52,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:52,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 6064 transitions. [2021-02-19 17:23:52,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:52,969 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:52,969 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:53,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-02-19 17:23:53,170 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:53,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:53,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1932986412, now seen corresponding path program 142 times [2021-02-19 17:23:53,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:53,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094523175] [2021-02-19 17:23:53,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:53,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094523175] [2021-02-19 17:23:53,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497835708] [2021-02-19 17:23:53,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:53,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:53,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:53,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:53,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:53,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:53,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-02-19 17:23:53,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80123517] [2021-02-19 17:23:53,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:53,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:53,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:53,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:53,299 INFO L87 Difference]: Start difference. First operand 2079 states and 6064 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:53,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:53,409 INFO L93 Difference]: Finished difference Result 2285 states and 6387 transitions. [2021-02-19 17:23:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:23:53,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:53,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:53,412 INFO L225 Difference]: With dead ends: 2285 [2021-02-19 17:23:53,412 INFO L226 Difference]: Without dead ends: 2284 [2021-02-19 17:23:53,413 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:23:53,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-02-19 17:23:53,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2072. [2021-02-19 17:23:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.91405118300338) internal successors, (6035), 2071 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6035 transitions. [2021-02-19 17:23:53,442 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6035 transitions. Word has length 20 [2021-02-19 17:23:53,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:53,442 INFO L480 AbstractCegarLoop]: Abstraction has 2072 states and 6035 transitions. [2021-02-19 17:23:53,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:53,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6035 transitions. [2021-02-19 17:23:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:53,444 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:53,444 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:53,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-02-19 17:23:53,658 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:53,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:53,658 INFO L82 PathProgramCache]: Analyzing trace with hash -651367576, now seen corresponding path program 143 times [2021-02-19 17:23:53,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:53,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413445303] [2021-02-19 17:23:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:53,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413445303] [2021-02-19 17:23:53,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387042686] [2021-02-19 17:23:53,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:53,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:23:53,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:53,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:23:53,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:53,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:53,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:23:53,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601505702] [2021-02-19 17:23:53,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:53,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:53,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:53,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:53,764 INFO L87 Difference]: Start difference. First operand 2072 states and 6035 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:53,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:53,899 INFO L93 Difference]: Finished difference Result 2223 states and 6241 transitions. [2021-02-19 17:23:53,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:23:53,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:53,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:53,902 INFO L225 Difference]: With dead ends: 2223 [2021-02-19 17:23:53,902 INFO L226 Difference]: Without dead ends: 2220 [2021-02-19 17:23:53,902 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:23:53,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-02-19 17:23:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2065. [2021-02-19 17:23:53,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9084302325581395) internal successors, (6003), 2064 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 6003 transitions. [2021-02-19 17:23:53,922 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 6003 transitions. Word has length 20 [2021-02-19 17:23:53,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:53,922 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 6003 transitions. [2021-02-19 17:23:53,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:53,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 6003 transitions. [2021-02-19 17:23:53,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:53,924 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:53,924 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:54,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-02-19 17:23:54,125 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:54,125 INFO L82 PathProgramCache]: Analyzing trace with hash 838037420, now seen corresponding path program 144 times [2021-02-19 17:23:54,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:54,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257344588] [2021-02-19 17:23:54,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:54,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257344588] [2021-02-19 17:23:54,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530756012] [2021-02-19 17:23:54,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:54,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:23:54,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:54,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:23:54,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:54,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:54,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:23:54,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105452216] [2021-02-19 17:23:54,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:54,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:54,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:54,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:54,241 INFO L87 Difference]: Start difference. First operand 2065 states and 6003 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:54,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:54,403 INFO L93 Difference]: Finished difference Result 2220 states and 6216 transitions. [2021-02-19 17:23:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:23:54,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:54,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:54,406 INFO L225 Difference]: With dead ends: 2220 [2021-02-19 17:23:54,406 INFO L226 Difference]: Without dead ends: 2216 [2021-02-19 17:23:54,406 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:23:54,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-02-19 17:23:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2065. [2021-02-19 17:23:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9040697674418605) internal successors, (5994), 2064 states have internal predecessors, (5994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:54,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5994 transitions. [2021-02-19 17:23:54,434 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5994 transitions. Word has length 20 [2021-02-19 17:23:54,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:54,434 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5994 transitions. [2021-02-19 17:23:54,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:54,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5994 transitions. [2021-02-19 17:23:54,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:54,436 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:54,436 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:54,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:54,636 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:54,637 INFO L82 PathProgramCache]: Analyzing trace with hash -235047960, now seen corresponding path program 145 times [2021-02-19 17:23:54,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:54,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565256817] [2021-02-19 17:23:54,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:54,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565256817] [2021-02-19 17:23:54,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592703032] [2021-02-19 17:23:54,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:54,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:54,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:54,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:54,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-02-19 17:23:54,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953364473] [2021-02-19 17:23:54,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:54,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:54,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:54,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:54,781 INFO L87 Difference]: Start difference. First operand 2065 states and 5994 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:54,928 INFO L93 Difference]: Finished difference Result 2259 states and 6407 transitions. [2021-02-19 17:23:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:54,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:54,931 INFO L225 Difference]: With dead ends: 2259 [2021-02-19 17:23:54,931 INFO L226 Difference]: Without dead ends: 2253 [2021-02-19 17:23:54,931 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:23:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-02-19 17:23:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2076. [2021-02-19 17:23:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 2.9016867469879517) internal successors, (6021), 2075 states have internal predecessors, (6021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 6021 transitions. [2021-02-19 17:23:54,956 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 6021 transitions. Word has length 20 [2021-02-19 17:23:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:54,956 INFO L480 AbstractCegarLoop]: Abstraction has 2076 states and 6021 transitions. [2021-02-19 17:23:54,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 6021 transitions. [2021-02-19 17:23:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:54,958 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:54,958 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:55,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-02-19 17:23:55,177 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:55,177 INFO L82 PathProgramCache]: Analyzing trace with hash -932100842, now seen corresponding path program 146 times [2021-02-19 17:23:55,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:55,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384431045] [2021-02-19 17:23:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:55,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384431045] [2021-02-19 17:23:55,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38283111] [2021-02-19 17:23:55,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:55,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:55,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:55,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:55,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:55,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-02-19 17:23:55,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698546055] [2021-02-19 17:23:55,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:55,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:55,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:55,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:55,303 INFO L87 Difference]: Start difference. First operand 2076 states and 6021 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:55,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:55,439 INFO L93 Difference]: Finished difference Result 2223 states and 6260 transitions. [2021-02-19 17:23:55,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:55,439 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:55,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:55,441 INFO L225 Difference]: With dead ends: 2223 [2021-02-19 17:23:55,441 INFO L226 Difference]: Without dead ends: 2214 [2021-02-19 17:23:55,441 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:23:55,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-02-19 17:23:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2064. [2021-02-19 17:23:55,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.9015996122152203) internal successors, (5986), 2063 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5986 transitions. [2021-02-19 17:23:55,460 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5986 transitions. Word has length 20 [2021-02-19 17:23:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:55,460 INFO L480 AbstractCegarLoop]: Abstraction has 2064 states and 5986 transitions. [2021-02-19 17:23:55,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5986 transitions. [2021-02-19 17:23:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:55,461 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:55,461 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:55,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:55,662 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:55,662 INFO L82 PathProgramCache]: Analyzing trace with hash 973613778, now seen corresponding path program 147 times [2021-02-19 17:23:55,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:55,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006061404] [2021-02-19 17:23:55,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:55,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006061404] [2021-02-19 17:23:55,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261612492] [2021-02-19 17:23:55,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:55,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:23:55,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:55,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:23:55,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:55,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:55,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:55,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122505999] [2021-02-19 17:23:55,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:55,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:55,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:55,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:55,774 INFO L87 Difference]: Start difference. First operand 2064 states and 5986 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:55,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:55,834 INFO L93 Difference]: Finished difference Result 2236 states and 6252 transitions. [2021-02-19 17:23:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:23:55,834 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:55,836 INFO L225 Difference]: With dead ends: 2236 [2021-02-19 17:23:55,836 INFO L226 Difference]: Without dead ends: 2236 [2021-02-19 17:23:55,836 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:55,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-02-19 17:23:55,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2065. [2021-02-19 17:23:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9001937984496124) internal successors, (5986), 2064 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:55,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5986 transitions. [2021-02-19 17:23:55,856 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5986 transitions. Word has length 20 [2021-02-19 17:23:55,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:55,856 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5986 transitions. [2021-02-19 17:23:55,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:55,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5986 transitions. [2021-02-19 17:23:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:55,858 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:55,858 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:56,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:56,058 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:56,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:56,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1575898828, now seen corresponding path program 148 times [2021-02-19 17:23:56,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:56,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744700922] [2021-02-19 17:23:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:56,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744700922] [2021-02-19 17:23:56,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44138966] [2021-02-19 17:23:56,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:56,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:56,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:56,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:56,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:56,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:56,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-02-19 17:23:56,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104264416] [2021-02-19 17:23:56,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:56,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:56,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:56,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:56,153 INFO L87 Difference]: Start difference. First operand 2065 states and 5986 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:56,230 INFO L93 Difference]: Finished difference Result 2263 states and 6281 transitions. [2021-02-19 17:23:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:23:56,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:56,232 INFO L225 Difference]: With dead ends: 2263 [2021-02-19 17:23:56,232 INFO L226 Difference]: Without dead ends: 2262 [2021-02-19 17:23:56,232 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:23:56,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-02-19 17:23:56,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2069. [2021-02-19 17:23:56,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.897001934235977) internal successors, (5991), 2068 states have internal predecessors, (5991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:56,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 5991 transitions. [2021-02-19 17:23:56,251 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 5991 transitions. Word has length 20 [2021-02-19 17:23:56,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:56,251 INFO L480 AbstractCegarLoop]: Abstraction has 2069 states and 5991 transitions. [2021-02-19 17:23:56,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:56,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 5991 transitions. [2021-02-19 17:23:56,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:56,253 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:56,253 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:56,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-02-19 17:23:56,466 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:56,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:56,466 INFO L82 PathProgramCache]: Analyzing trace with hash 134714480, now seen corresponding path program 149 times [2021-02-19 17:23:56,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:56,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860844821] [2021-02-19 17:23:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:56,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860844821] [2021-02-19 17:23:56,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253935895] [2021-02-19 17:23:56,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:56,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:23:56,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:56,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:56,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:56,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:56,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-02-19 17:23:56,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591043494] [2021-02-19 17:23:56,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:56,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:56,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:56,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:56,574 INFO L87 Difference]: Start difference. First operand 2069 states and 5991 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:56,697 INFO L93 Difference]: Finished difference Result 2229 states and 6208 transitions. [2021-02-19 17:23:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:56,698 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:56,699 INFO L225 Difference]: With dead ends: 2229 [2021-02-19 17:23:56,699 INFO L226 Difference]: Without dead ends: 2225 [2021-02-19 17:23:56,700 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:23:56,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-02-19 17:23:56,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2054. [2021-02-19 17:23:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 2.8913784705309302) internal successors, (5936), 2053 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 5936 transitions. [2021-02-19 17:23:56,719 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 5936 transitions. Word has length 20 [2021-02-19 17:23:56,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:56,719 INFO L480 AbstractCegarLoop]: Abstraction has 2054 states and 5936 transitions. [2021-02-19 17:23:56,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:56,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 5936 transitions. [2021-02-19 17:23:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:56,721 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:56,721 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:56,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:56,921 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:56,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1624119476, now seen corresponding path program 150 times [2021-02-19 17:23:56,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:56,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269135938] [2021-02-19 17:23:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:56,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269135938] [2021-02-19 17:23:56,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377094332] [2021-02-19 17:23:56,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:56,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:23:56,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:56,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:23:56,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:57,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:57,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-02-19 17:23:57,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796018328] [2021-02-19 17:23:57,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:23:57,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:57,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:23:57,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:23:57,028 INFO L87 Difference]: Start difference. First operand 2054 states and 5936 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:57,165 INFO L93 Difference]: Finished difference Result 2217 states and 6160 transitions. [2021-02-19 17:23:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:23:57,166 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:57,168 INFO L225 Difference]: With dead ends: 2217 [2021-02-19 17:23:57,168 INFO L226 Difference]: Without dead ends: 2211 [2021-02-19 17:23:57,168 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:23:57,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-02-19 17:23:57,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2046. [2021-02-19 17:23:57,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 2.8880195599022005) internal successors, (5906), 2045 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 5906 transitions. [2021-02-19 17:23:57,187 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 5906 transitions. Word has length 20 [2021-02-19 17:23:57,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:57,187 INFO L480 AbstractCegarLoop]: Abstraction has 2046 states and 5906 transitions. [2021-02-19 17:23:57,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 5906 transitions. [2021-02-19 17:23:57,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:57,189 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:57,189 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:57,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable606 [2021-02-19 17:23:57,389 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:57,390 INFO L82 PathProgramCache]: Analyzing trace with hash 551034096, now seen corresponding path program 151 times [2021-02-19 17:23:57,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:57,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384873193] [2021-02-19 17:23:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:57,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384873193] [2021-02-19 17:23:57,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986575726] [2021-02-19 17:23:57,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:57,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:57,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:57,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:57,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-02-19 17:23:57,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993834817] [2021-02-19 17:23:57,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:57,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:57,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:57,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:57,500 INFO L87 Difference]: Start difference. First operand 2046 states and 5906 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:57,656 INFO L93 Difference]: Finished difference Result 2213 states and 6136 transitions. [2021-02-19 17:23:57,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:23:57,657 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:57,659 INFO L225 Difference]: With dead ends: 2213 [2021-02-19 17:23:57,659 INFO L226 Difference]: Without dead ends: 2207 [2021-02-19 17:23:57,659 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:23:57,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-02-19 17:23:57,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2047. [2021-02-19 17:23:57,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 2.8836754643206257) internal successors, (5900), 2046 states have internal predecessors, (5900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:57,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 5900 transitions. [2021-02-19 17:23:57,678 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 5900 transitions. Word has length 20 [2021-02-19 17:23:57,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:57,679 INFO L480 AbstractCegarLoop]: Abstraction has 2047 states and 5900 transitions. [2021-02-19 17:23:57,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:57,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 5900 transitions. [2021-02-19 17:23:57,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:57,680 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:57,680 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:57,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:57,881 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:57,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1645125684, now seen corresponding path program 152 times [2021-02-19 17:23:57,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:57,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8645628] [2021-02-19 17:23:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:57,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8645628] [2021-02-19 17:23:57,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138253728] [2021-02-19 17:23:57,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:57,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:23:57,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:57,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:57,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:57,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:57,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-02-19 17:23:57,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299357101] [2021-02-19 17:23:57,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:57,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:57,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:57,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:57,995 INFO L87 Difference]: Start difference. First operand 2047 states and 5900 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:58,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:58,156 INFO L93 Difference]: Finished difference Result 2421 states and 6711 transitions. [2021-02-19 17:23:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:23:58,156 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:58,159 INFO L225 Difference]: With dead ends: 2421 [2021-02-19 17:23:58,159 INFO L226 Difference]: Without dead ends: 2413 [2021-02-19 17:23:58,159 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:23:58,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-02-19 17:23:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2084. [2021-02-19 17:23:58,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.884301488238118) internal successors, (6008), 2083 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 6008 transitions. [2021-02-19 17:23:58,191 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 6008 transitions. Word has length 20 [2021-02-19 17:23:58,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:58,191 INFO L480 AbstractCegarLoop]: Abstraction has 2084 states and 6008 transitions. [2021-02-19 17:23:58,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:58,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 6008 transitions. [2021-02-19 17:23:58,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:58,193 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:58,193 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:58,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:58,393 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:58,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:58,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1511322822, now seen corresponding path program 153 times [2021-02-19 17:23:58,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:58,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218472738] [2021-02-19 17:23:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:58,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218472738] [2021-02-19 17:23:58,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555010219] [2021-02-19 17:23:58,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:58,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:23:58,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:58,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:23:58,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:58,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:58,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:23:58,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516824937] [2021-02-19 17:23:58,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:23:58,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:58,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:23:58,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:58,530 INFO L87 Difference]: Start difference. First operand 2084 states and 6008 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:58,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:58,672 INFO L93 Difference]: Finished difference Result 2248 states and 6298 transitions. [2021-02-19 17:23:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:23:58,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:58,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:58,674 INFO L225 Difference]: With dead ends: 2248 [2021-02-19 17:23:58,674 INFO L226 Difference]: Without dead ends: 2240 [2021-02-19 17:23:58,675 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:23:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2021-02-19 17:23:58,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 2079. [2021-02-19 17:23:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 2.8816169393647737) internal successors, (5988), 2078 states have internal predecessors, (5988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 5988 transitions. [2021-02-19 17:23:58,694 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 5988 transitions. Word has length 20 [2021-02-19 17:23:58,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:58,694 INFO L480 AbstractCegarLoop]: Abstraction has 2079 states and 5988 transitions. [2021-02-19 17:23:58,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:58,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 5988 transitions. [2021-02-19 17:23:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:58,695 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:58,695 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:58,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:58,896 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:58,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:58,896 INFO L82 PathProgramCache]: Analyzing trace with hash -427646262, now seen corresponding path program 154 times [2021-02-19 17:23:58,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:58,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096724789] [2021-02-19 17:23:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:58,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096724789] [2021-02-19 17:23:58,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352481839] [2021-02-19 17:23:58,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:58,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:23:58,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:58,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:23:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:58,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:58,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-02-19 17:23:58,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181741723] [2021-02-19 17:23:58,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:23:58,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:58,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:23:58,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:23:58,998 INFO L87 Difference]: Start difference. First operand 2079 states and 5988 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:59,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:59,048 INFO L93 Difference]: Finished difference Result 2261 states and 6260 transitions. [2021-02-19 17:23:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:23:59,048 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:59,050 INFO L225 Difference]: With dead ends: 2261 [2021-02-19 17:23:59,050 INFO L226 Difference]: Without dead ends: 2259 [2021-02-19 17:23:59,050 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-02-19 17:23:59,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2075. [2021-02-19 17:23:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 2074 states have (on average 2.880424300867888) internal successors, (5974), 2074 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 5974 transitions. [2021-02-19 17:23:59,072 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 5974 transitions. Word has length 20 [2021-02-19 17:23:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:59,072 INFO L480 AbstractCegarLoop]: Abstraction has 2075 states and 5974 transitions. [2021-02-19 17:23:59,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 5974 transitions. [2021-02-19 17:23:59,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:59,073 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:59,073 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:59,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:59,274 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:59,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1317808428, now seen corresponding path program 155 times [2021-02-19 17:23:59,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:59,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231217317] [2021-02-19 17:23:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:23:59,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231217317] [2021-02-19 17:23:59,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110019102] [2021-02-19 17:23:59,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:59,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:23:59,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:59,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:23:59,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:23:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:23:59,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:59,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-02-19 17:23:59,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789775552] [2021-02-19 17:23:59,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:59,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:59,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:59,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:59,380 INFO L87 Difference]: Start difference. First operand 2075 states and 5974 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:59,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:59,443 INFO L93 Difference]: Finished difference Result 2242 states and 6197 transitions. [2021-02-19 17:23:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:23:59,443 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:59,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:59,445 INFO L225 Difference]: With dead ends: 2242 [2021-02-19 17:23:59,445 INFO L226 Difference]: Without dead ends: 2242 [2021-02-19 17:23:59,446 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:23:59,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-02-19 17:23:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2021-02-19 17:23:59,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.874515503875969) internal successors, (5933), 2064 states have internal predecessors, (5933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5933 transitions. [2021-02-19 17:23:59,474 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5933 transitions. Word has length 20 [2021-02-19 17:23:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:59,474 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5933 transitions. [2021-02-19 17:23:59,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5933 transitions. [2021-02-19 17:23:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:59,475 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:59,475 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:23:59,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-02-19 17:23:59,676 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:23:59,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:23:59,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1266545560, now seen corresponding path program 156 times [2021-02-19 17:23:59,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:23:59,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262768853] [2021-02-19 17:23:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:23:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:23:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:59,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262768853] [2021-02-19 17:23:59,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411257874] [2021-02-19 17:23:59,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:23:59,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:23:59,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:23:59,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:23:59,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:23:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:23:59,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:23:59,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:23:59,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288352566] [2021-02-19 17:23:59,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:23:59,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:23:59,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:23:59,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:23:59,801 INFO L87 Difference]: Start difference. First operand 2065 states and 5933 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:23:59,910 INFO L93 Difference]: Finished difference Result 2234 states and 6164 transitions. [2021-02-19 17:23:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:23:59,911 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:23:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:23:59,913 INFO L225 Difference]: With dead ends: 2234 [2021-02-19 17:23:59,913 INFO L226 Difference]: Without dead ends: 2231 [2021-02-19 17:23:59,913 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:23:59,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-02-19 17:23:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2055. [2021-02-19 17:23:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8690360272638755) internal successors, (5893), 2054 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5893 transitions. [2021-02-19 17:23:59,932 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5893 transitions. Word has length 20 [2021-02-19 17:23:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:23:59,933 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5893 transitions. [2021-02-19 17:23:59,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:23:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5893 transitions. [2021-02-19 17:23:59,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:23:59,934 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:23:59,934 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:00,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-02-19 17:24:00,135 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:00,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:00,135 INFO L82 PathProgramCache]: Analyzing trace with hash 222859436, now seen corresponding path program 157 times [2021-02-19 17:24:00,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:00,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544881642] [2021-02-19 17:24:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:00,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:00,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544881642] [2021-02-19 17:24:00,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565935476] [2021-02-19 17:24:00,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:00,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:00,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:00,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:00,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-02-19 17:24:00,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075119457] [2021-02-19 17:24:00,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:00,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:00,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:00,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:00,238 INFO L87 Difference]: Start difference. First operand 2055 states and 5893 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:00,361 INFO L93 Difference]: Finished difference Result 2228 states and 6131 transitions. [2021-02-19 17:24:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:24:00,361 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:00,363 INFO L225 Difference]: With dead ends: 2228 [2021-02-19 17:24:00,363 INFO L226 Difference]: Without dead ends: 2224 [2021-02-19 17:24:00,363 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:24:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-02-19 17:24:00,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2055. [2021-02-19 17:24:00,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.862706913339825) internal successors, (5880), 2054 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5880 transitions. [2021-02-19 17:24:00,382 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5880 transitions. Word has length 20 [2021-02-19 17:24:00,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:00,383 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5880 transitions. [2021-02-19 17:24:00,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5880 transitions. [2021-02-19 17:24:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:00,384 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:00,384 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:00,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-02-19 17:24:00,585 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:00,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:00,585 INFO L82 PathProgramCache]: Analyzing trace with hash -850225944, now seen corresponding path program 158 times [2021-02-19 17:24:00,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:00,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431103210] [2021-02-19 17:24:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:00,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431103210] [2021-02-19 17:24:00,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354210285] [2021-02-19 17:24:00,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:00,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:00,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:00,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:00,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:00,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:00,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-02-19 17:24:00,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857304897] [2021-02-19 17:24:00,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:00,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:00,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:00,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:00,694 INFO L87 Difference]: Start difference. First operand 2055 states and 5880 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:00,826 INFO L93 Difference]: Finished difference Result 2691 states and 7378 transitions. [2021-02-19 17:24:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:24:00,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:00,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:00,828 INFO L225 Difference]: With dead ends: 2691 [2021-02-19 17:24:00,828 INFO L226 Difference]: Without dead ends: 2685 [2021-02-19 17:24:00,828 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:24:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-02-19 17:24:00,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2055. [2021-02-19 17:24:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8612463485881205) internal successors, (5877), 2054 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:00,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5877 transitions. [2021-02-19 17:24:00,849 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5877 transitions. Word has length 20 [2021-02-19 17:24:00,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:00,849 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5877 transitions. [2021-02-19 17:24:00,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:00,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5877 transitions. [2021-02-19 17:24:00,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:00,850 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:00,850 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:01,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:01,051 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:01,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:01,051 INFO L82 PathProgramCache]: Analyzing trace with hash 243865644, now seen corresponding path program 159 times [2021-02-19 17:24:01,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:01,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682171234] [2021-02-19 17:24:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:01,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682171234] [2021-02-19 17:24:01,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255352558] [2021-02-19 17:24:01,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:01,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:24:01,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:01,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:24:01,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:01,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:01,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:24:01,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384870328] [2021-02-19 17:24:01,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:01,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:01,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:01,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:01,168 INFO L87 Difference]: Start difference. First operand 2055 states and 5877 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:01,313 INFO L93 Difference]: Finished difference Result 2703 states and 7388 transitions. [2021-02-19 17:24:01,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:24:01,313 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:01,316 INFO L225 Difference]: With dead ends: 2703 [2021-02-19 17:24:01,316 INFO L226 Difference]: Without dead ends: 2695 [2021-02-19 17:24:01,316 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:01,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-02-19 17:24:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2065. [2021-02-19 17:24:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.862403100775194) internal successors, (5908), 2064 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5908 transitions. [2021-02-19 17:24:01,339 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5908 transitions. Word has length 20 [2021-02-19 17:24:01,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:01,339 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5908 transitions. [2021-02-19 17:24:01,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:01,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5908 transitions. [2021-02-19 17:24:01,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:01,341 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:01,341 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:01,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-02-19 17:24:01,541 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:01,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:01,541 INFO L82 PathProgramCache]: Analyzing trace with hash -199033496, now seen corresponding path program 160 times [2021-02-19 17:24:01,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:01,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739735371] [2021-02-19 17:24:01,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:01,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739735371] [2021-02-19 17:24:01,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241766596] [2021-02-19 17:24:01,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:01,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:01,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:01,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:01,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:01,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:01,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-02-19 17:24:01,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956015131] [2021-02-19 17:24:01,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:01,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:01,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:01,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:01,661 INFO L87 Difference]: Start difference. First operand 2065 states and 5908 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:01,812 INFO L93 Difference]: Finished difference Result 2452 states and 6775 transitions. [2021-02-19 17:24:01,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:24:01,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:01,815 INFO L225 Difference]: With dead ends: 2452 [2021-02-19 17:24:01,815 INFO L226 Difference]: Without dead ends: 2442 [2021-02-19 17:24:01,815 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:24:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-02-19 17:24:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2065. [2021-02-19 17:24:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.8614341085271318) internal successors, (5906), 2064 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5906 transitions. [2021-02-19 17:24:01,834 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5906 transitions. Word has length 20 [2021-02-19 17:24:01,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:01,834 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5906 transitions. [2021-02-19 17:24:01,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:01,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5906 transitions. [2021-02-19 17:24:01,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:01,836 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:01,836 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:02,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:02,036 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:02,037 INFO L82 PathProgramCache]: Analyzing trace with hash 539565586, now seen corresponding path program 161 times [2021-02-19 17:24:02,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:02,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445509221] [2021-02-19 17:24:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:02,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445509221] [2021-02-19 17:24:02,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872637464] [2021-02-19 17:24:02,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:02,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:24:02,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:02,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:02,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:02,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:02,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-02-19 17:24:02,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18274670] [2021-02-19 17:24:02,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:02,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:02,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:02,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:02,186 INFO L87 Difference]: Start difference. First operand 2065 states and 5906 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:02,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:02,347 INFO L93 Difference]: Finished difference Result 2203 states and 6075 transitions. [2021-02-19 17:24:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:24:02,347 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:02,350 INFO L225 Difference]: With dead ends: 2203 [2021-02-19 17:24:02,350 INFO L226 Difference]: Without dead ends: 2199 [2021-02-19 17:24:02,350 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:24:02,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-02-19 17:24:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2018. [2021-02-19 17:24:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.8507684680218146) internal successors, (5750), 2017 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5750 transitions. [2021-02-19 17:24:02,377 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5750 transitions. Word has length 20 [2021-02-19 17:24:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:02,377 INFO L480 AbstractCegarLoop]: Abstraction has 2018 states and 5750 transitions. [2021-02-19 17:24:02,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:02,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5750 transitions. [2021-02-19 17:24:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:02,379 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:02,379 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:02,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:02,594 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:02,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:02,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1847455920, now seen corresponding path program 162 times [2021-02-19 17:24:02,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:02,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636371312] [2021-02-19 17:24:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:02,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636371312] [2021-02-19 17:24:02,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650029826] [2021-02-19 17:24:02,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:02,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:24:02,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:02,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:02,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:02,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:02,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-02-19 17:24:02,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120438139] [2021-02-19 17:24:02,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:02,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:02,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:02,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:02,702 INFO L87 Difference]: Start difference. First operand 2018 states and 5750 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:02,821 INFO L93 Difference]: Finished difference Result 2240 states and 6144 transitions. [2021-02-19 17:24:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:24:02,821 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:02,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:02,823 INFO L225 Difference]: With dead ends: 2240 [2021-02-19 17:24:02,823 INFO L226 Difference]: Without dead ends: 2231 [2021-02-19 17:24:02,823 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:24:02,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-02-19 17:24:02,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2011. [2021-02-19 17:24:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 2010 states have (on average 2.846268656716418) internal successors, (5721), 2010 states have internal predecessors, (5721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 5721 transitions. [2021-02-19 17:24:02,843 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 5721 transitions. Word has length 20 [2021-02-19 17:24:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:02,843 INFO L480 AbstractCegarLoop]: Abstraction has 2011 states and 5721 transitions. [2021-02-19 17:24:02,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:02,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 5721 transitions. [2021-02-19 17:24:02,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:02,844 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:02,844 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:03,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:03,045 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:03,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1353419788, now seen corresponding path program 163 times [2021-02-19 17:24:03,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:03,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983283871] [2021-02-19 17:24:03,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:03,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983283871] [2021-02-19 17:24:03,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480454443] [2021-02-19 17:24:03,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:03,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:03,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:03,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:03,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-02-19 17:24:03,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143262530] [2021-02-19 17:24:03,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:03,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:03,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:03,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:03,160 INFO L87 Difference]: Start difference. First operand 2011 states and 5721 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:03,326 INFO L93 Difference]: Finished difference Result 2239 states and 6126 transitions. [2021-02-19 17:24:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:24:03,326 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:03,329 INFO L225 Difference]: With dead ends: 2239 [2021-02-19 17:24:03,329 INFO L226 Difference]: Without dead ends: 2231 [2021-02-19 17:24:03,329 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-02-19 17:24:03,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2024. [2021-02-19 17:24:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.842313395946614) internal successors, (5750), 2023 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5750 transitions. [2021-02-19 17:24:03,357 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5750 transitions. Word has length 20 [2021-02-19 17:24:03,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:03,357 INFO L480 AbstractCegarLoop]: Abstraction has 2024 states and 5750 transitions. [2021-02-19 17:24:03,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:03,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5750 transitions. [2021-02-19 17:24:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:03,359 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:03,360 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:03,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:03,578 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:03,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:03,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1796318928, now seen corresponding path program 164 times [2021-02-19 17:24:03,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:03,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608555702] [2021-02-19 17:24:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:03,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608555702] [2021-02-19 17:24:03,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132463546] [2021-02-19 17:24:03,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:03,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:03,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:03,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:03,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:03,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:03,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-02-19 17:24:03,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127959738] [2021-02-19 17:24:03,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:03,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:03,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:03,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:03,694 INFO L87 Difference]: Start difference. First operand 2024 states and 5750 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:03,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:03,842 INFO L93 Difference]: Finished difference Result 2477 states and 6771 transitions. [2021-02-19 17:24:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:24:03,842 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:03,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:03,844 INFO L225 Difference]: With dead ends: 2477 [2021-02-19 17:24:03,844 INFO L226 Difference]: Without dead ends: 2467 [2021-02-19 17:24:03,845 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:24:03,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-02-19 17:24:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2031. [2021-02-19 17:24:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.840394088669951) internal successors, (5766), 2030 states have internal predecessors, (5766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5766 transitions. [2021-02-19 17:24:03,863 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5766 transitions. Word has length 20 [2021-02-19 17:24:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:03,863 INFO L480 AbstractCegarLoop]: Abstraction has 2031 states and 5766 transitions. [2021-02-19 17:24:03,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5766 transitions. [2021-02-19 17:24:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:03,865 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:03,865 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:04,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2021-02-19 17:24:04,066 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:04,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:04,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1544403316, now seen corresponding path program 165 times [2021-02-19 17:24:04,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:04,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731671804] [2021-02-19 17:24:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:04,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731671804] [2021-02-19 17:24:04,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872968667] [2021-02-19 17:24:04,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:04,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:24:04,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:04,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:24:04,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:04,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:04,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:24:04,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373020449] [2021-02-19 17:24:04,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:24:04,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:04,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:24:04,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:24:04,172 INFO L87 Difference]: Start difference. First operand 2031 states and 5766 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:04,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:04,255 INFO L93 Difference]: Finished difference Result 2228 states and 6076 transitions. [2021-02-19 17:24:04,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:24:04,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:04,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:04,258 INFO L225 Difference]: With dead ends: 2228 [2021-02-19 17:24:04,258 INFO L226 Difference]: Without dead ends: 2228 [2021-02-19 17:24:04,258 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:04,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-02-19 17:24:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2015. [2021-02-19 17:24:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 2.837140019860973) internal successors, (5714), 2014 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 5714 transitions. [2021-02-19 17:24:04,277 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 5714 transitions. Word has length 20 [2021-02-19 17:24:04,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:04,277 INFO L480 AbstractCegarLoop]: Abstraction has 2015 states and 5714 transitions. [2021-02-19 17:24:04,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:04,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 5714 transitions. [2021-02-19 17:24:04,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:04,279 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:04,279 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:04,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-02-19 17:24:04,479 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:04,480 INFO L82 PathProgramCache]: Analyzing trace with hash -51954922, now seen corresponding path program 166 times [2021-02-19 17:24:04,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:04,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790585782] [2021-02-19 17:24:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:04,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790585782] [2021-02-19 17:24:04,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190986999] [2021-02-19 17:24:04,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:04,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:04,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:04,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:04,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:04,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:04,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-02-19 17:24:04,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288145928] [2021-02-19 17:24:04,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:04,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:04,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:04,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:04,630 INFO L87 Difference]: Start difference. First operand 2015 states and 5714 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:04,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:04,789 INFO L93 Difference]: Finished difference Result 2228 states and 6116 transitions. [2021-02-19 17:24:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:24:04,789 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:04,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:04,791 INFO L225 Difference]: With dead ends: 2228 [2021-02-19 17:24:04,791 INFO L226 Difference]: Without dead ends: 2218 [2021-02-19 17:24:04,791 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:24:04,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-02-19 17:24:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2010. [2021-02-19 17:24:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 2.8322548531607765) internal successors, (5690), 2009 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:04,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 5690 transitions. [2021-02-19 17:24:04,810 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 5690 transitions. Word has length 20 [2021-02-19 17:24:04,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:04,810 INFO L480 AbstractCegarLoop]: Abstraction has 2010 states and 5690 transitions. [2021-02-19 17:24:04,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:04,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 5690 transitions. [2021-02-19 17:24:04,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:04,812 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:04,812 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:05,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:05,013 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:05,013 INFO L82 PathProgramCache]: Analyzing trace with hash -917034542, now seen corresponding path program 167 times [2021-02-19 17:24:05,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:05,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605808242] [2021-02-19 17:24:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:05,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605808242] [2021-02-19 17:24:05,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382954090] [2021-02-19 17:24:05,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:05,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:24:05,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:05,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:05,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:05,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:05,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-02-19 17:24:05,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461178087] [2021-02-19 17:24:05,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:24:05,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:05,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:24:05,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:24:05,113 INFO L87 Difference]: Start difference. First operand 2010 states and 5690 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:05,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:05,174 INFO L93 Difference]: Finished difference Result 2251 states and 6063 transitions. [2021-02-19 17:24:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:24:05,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:05,177 INFO L225 Difference]: With dead ends: 2251 [2021-02-19 17:24:05,177 INFO L226 Difference]: Without dead ends: 2251 [2021-02-19 17:24:05,177 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-02-19 17:24:05,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 2017. [2021-02-19 17:24:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.8348214285714284) internal successors, (5715), 2016 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:05,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5715 transitions. [2021-02-19 17:24:05,196 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5715 transitions. Word has length 20 [2021-02-19 17:24:05,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:05,196 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 5715 transitions. [2021-02-19 17:24:05,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5715 transitions. [2021-02-19 17:24:05,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:05,197 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:05,197 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:05,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-02-19 17:24:05,398 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:05,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:05,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1755933840, now seen corresponding path program 168 times [2021-02-19 17:24:05,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:05,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748885332] [2021-02-19 17:24:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:05,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748885332] [2021-02-19 17:24:05,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080750620] [2021-02-19 17:24:05,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:05,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:24:05,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:05,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:05,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:05,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:05,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-02-19 17:24:05,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355155468] [2021-02-19 17:24:05,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:24:05,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:05,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:24:05,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:24:05,501 INFO L87 Difference]: Start difference. First operand 2017 states and 5715 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:05,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:05,629 INFO L93 Difference]: Finished difference Result 2206 states and 5970 transitions. [2021-02-19 17:24:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:24:05,629 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:05,631 INFO L225 Difference]: With dead ends: 2206 [2021-02-19 17:24:05,631 INFO L226 Difference]: Without dead ends: 2204 [2021-02-19 17:24:05,631 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:24:05,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-02-19 17:24:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2017. [2021-02-19 17:24:05,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.831845238095238) internal successors, (5709), 2016 states have internal predecessors, (5709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:05,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5709 transitions. [2021-02-19 17:24:05,650 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5709 transitions. Word has length 20 [2021-02-19 17:24:05,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:05,650 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 5709 transitions. [2021-02-19 17:24:05,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:05,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5709 transitions. [2021-02-19 17:24:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:05,652 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:05,652 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:05,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-02-19 17:24:05,852 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:05,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:05,852 INFO L82 PathProgramCache]: Analyzing trace with hash -266528844, now seen corresponding path program 169 times [2021-02-19 17:24:05,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:05,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71958899] [2021-02-19 17:24:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:05,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71958899] [2021-02-19 17:24:05,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459245090] [2021-02-19 17:24:05,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:05,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:05,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:05,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:05,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-02-19 17:24:05,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976159704] [2021-02-19 17:24:05,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:05,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:05,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:05,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:05,972 INFO L87 Difference]: Start difference. First operand 2017 states and 5709 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:06,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:06,096 INFO L93 Difference]: Finished difference Result 2212 states and 5972 transitions. [2021-02-19 17:24:06,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:24:06,096 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:06,098 INFO L225 Difference]: With dead ends: 2212 [2021-02-19 17:24:06,098 INFO L226 Difference]: Without dead ends: 2208 [2021-02-19 17:24:06,098 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:24:06,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-02-19 17:24:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2017. [2021-02-19 17:24:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.825892857142857) internal successors, (5697), 2016 states have internal predecessors, (5697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5697 transitions. [2021-02-19 17:24:06,119 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5697 transitions. Word has length 20 [2021-02-19 17:24:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:06,119 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 5697 transitions. [2021-02-19 17:24:06,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5697 transitions. [2021-02-19 17:24:06,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:06,120 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:06,120 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:06,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable625 [2021-02-19 17:24:06,321 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:06,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:06,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1339614224, now seen corresponding path program 170 times [2021-02-19 17:24:06,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:06,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621309702] [2021-02-19 17:24:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:06,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621309702] [2021-02-19 17:24:06,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528604177] [2021-02-19 17:24:06,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:06,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:06,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:06,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:06,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:06,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-02-19 17:24:06,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303134183] [2021-02-19 17:24:06,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:06,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:06,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:06,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:06,449 INFO L87 Difference]: Start difference. First operand 2017 states and 5697 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:06,582 INFO L93 Difference]: Finished difference Result 2220 states and 5971 transitions. [2021-02-19 17:24:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:24:06,583 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:06,585 INFO L225 Difference]: With dead ends: 2220 [2021-02-19 17:24:06,585 INFO L226 Difference]: Without dead ends: 2214 [2021-02-19 17:24:06,585 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-02-19 17:24:06,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2017. [2021-02-19 17:24:06,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.8179563492063493) internal successors, (5681), 2016 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5681 transitions. [2021-02-19 17:24:06,605 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5681 transitions. Word has length 20 [2021-02-19 17:24:06,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:06,605 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 5681 transitions. [2021-02-19 17:24:06,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5681 transitions. [2021-02-19 17:24:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:06,607 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:06,607 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:06,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:06,807 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:06,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:06,808 INFO L82 PathProgramCache]: Analyzing trace with hash -245522636, now seen corresponding path program 171 times [2021-02-19 17:24:06,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:06,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450682367] [2021-02-19 17:24:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:06,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450682367] [2021-02-19 17:24:06,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327611125] [2021-02-19 17:24:06,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:06,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:24:06,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:06,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:24:06,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:06,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:06,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-02-19 17:24:06,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149173323] [2021-02-19 17:24:06,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:06,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:06,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:06,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:06,928 INFO L87 Difference]: Start difference. First operand 2017 states and 5681 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:07,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:07,075 INFO L93 Difference]: Finished difference Result 2831 states and 7603 transitions. [2021-02-19 17:24:07,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:24:07,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:07,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:07,078 INFO L225 Difference]: With dead ends: 2831 [2021-02-19 17:24:07,078 INFO L226 Difference]: Without dead ends: 2823 [2021-02-19 17:24:07,078 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:24:07,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-02-19 17:24:07,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2036. [2021-02-19 17:24:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2035 states have (on average 2.8147420147420146) internal successors, (5728), 2035 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 5728 transitions. [2021-02-19 17:24:07,100 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 5728 transitions. Word has length 20 [2021-02-19 17:24:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:07,100 INFO L480 AbstractCegarLoop]: Abstraction has 2036 states and 5728 transitions. [2021-02-19 17:24:07,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 5728 transitions. [2021-02-19 17:24:07,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:07,101 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:07,101 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:07,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:07,302 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:07,302 INFO L82 PathProgramCache]: Analyzing trace with hash -688421776, now seen corresponding path program 172 times [2021-02-19 17:24:07,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:07,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965177101] [2021-02-19 17:24:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:07,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965177101] [2021-02-19 17:24:07,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102548788] [2021-02-19 17:24:07,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:07,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:07,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:07,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:07,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:07,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:07,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-02-19 17:24:07,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768890068] [2021-02-19 17:24:07,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:07,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:07,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:07,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:07,430 INFO L87 Difference]: Start difference. First operand 2036 states and 5728 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:07,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:07,594 INFO L93 Difference]: Finished difference Result 2850 states and 7623 transitions. [2021-02-19 17:24:07,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:24:07,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:07,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:07,597 INFO L225 Difference]: With dead ends: 2850 [2021-02-19 17:24:07,597 INFO L226 Difference]: Without dead ends: 2840 [2021-02-19 17:24:07,597 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:24:07,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-02-19 17:24:07,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2053. [2021-02-19 17:24:07,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.8118908382066277) internal successors, (5770), 2052 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:07,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5770 transitions. [2021-02-19 17:24:07,618 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5770 transitions. Word has length 20 [2021-02-19 17:24:07,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:07,618 INFO L480 AbstractCegarLoop]: Abstraction has 2053 states and 5770 transitions. [2021-02-19 17:24:07,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5770 transitions. [2021-02-19 17:24:07,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:07,619 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:07,619 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:07,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:07,820 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:07,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:07,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1533393228, now seen corresponding path program 173 times [2021-02-19 17:24:07,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:07,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233091757] [2021-02-19 17:24:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:07,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233091757] [2021-02-19 17:24:07,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075852506] [2021-02-19 17:24:07,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:07,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:24:07,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:07,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:07,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:07,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:07,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-02-19 17:24:07,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306928979] [2021-02-19 17:24:07,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:07,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:07,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:07,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:07,949 INFO L87 Difference]: Start difference. First operand 2053 states and 5770 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:08,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:08,148 INFO L93 Difference]: Finished difference Result 2624 states and 7060 transitions. [2021-02-19 17:24:08,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:24:08,148 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:08,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:08,151 INFO L225 Difference]: With dead ends: 2624 [2021-02-19 17:24:08,151 INFO L226 Difference]: Without dead ends: 2612 [2021-02-19 17:24:08,151 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:24:08,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-02-19 17:24:08,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2055. [2021-02-19 17:24:08,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.809152872444012) internal successors, (5770), 2054 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:08,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5770 transitions. [2021-02-19 17:24:08,180 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5770 transitions. Word has length 20 [2021-02-19 17:24:08,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:08,180 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5770 transitions. [2021-02-19 17:24:08,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:08,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5770 transitions. [2021-02-19 17:24:08,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:08,181 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:08,181 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:08,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:08,382 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:08,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:08,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1731642550, now seen corresponding path program 174 times [2021-02-19 17:24:08,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:08,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043237561] [2021-02-19 17:24:08,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:08,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043237561] [2021-02-19 17:24:08,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010483541] [2021-02-19 17:24:08,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:08,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:24:08,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:08,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:08,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:08,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:08,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-02-19 17:24:08,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884292064] [2021-02-19 17:24:08,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:24:08,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:08,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:24:08,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:24:08,535 INFO L87 Difference]: Start difference. First operand 2055 states and 5770 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:08,699 INFO L93 Difference]: Finished difference Result 2268 states and 6126 transitions. [2021-02-19 17:24:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:24:08,699 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:08,701 INFO L225 Difference]: With dead ends: 2268 [2021-02-19 17:24:08,701 INFO L226 Difference]: Without dead ends: 2264 [2021-02-19 17:24:08,701 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:24:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-02-19 17:24:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2075. [2021-02-19 17:24:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 2074 states have (on average 2.8105110896817744) internal successors, (5829), 2074 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 5829 transitions. [2021-02-19 17:24:08,721 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 5829 transitions. Word has length 20 [2021-02-19 17:24:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:08,721 INFO L480 AbstractCegarLoop]: Abstraction has 2075 states and 5829 transitions. [2021-02-19 17:24:08,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 5829 transitions. [2021-02-19 17:24:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:08,722 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:08,722 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:08,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-02-19 17:24:08,923 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:08,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:08,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1778236524, now seen corresponding path program 175 times [2021-02-19 17:24:08,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:08,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469990201] [2021-02-19 17:24:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:08,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469990201] [2021-02-19 17:24:08,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315743320] [2021-02-19 17:24:08,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:09,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:09,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:09,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:09,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-02-19 17:24:09,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967969025] [2021-02-19 17:24:09,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:09,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:09,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:09,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:09,057 INFO L87 Difference]: Start difference. First operand 2075 states and 5829 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:09,203 INFO L93 Difference]: Finished difference Result 2331 states and 6297 transitions. [2021-02-19 17:24:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:24:09,204 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:09,206 INFO L225 Difference]: With dead ends: 2331 [2021-02-19 17:24:09,206 INFO L226 Difference]: Without dead ends: 2323 [2021-02-19 17:24:09,206 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:24:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-02-19 17:24:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2075. [2021-02-19 17:24:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 2074 states have (on average 2.8066538090646094) internal successors, (5821), 2074 states have internal predecessors, (5821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 5821 transitions. [2021-02-19 17:24:09,226 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 5821 transitions. Word has length 20 [2021-02-19 17:24:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:09,226 INFO L480 AbstractCegarLoop]: Abstraction has 2075 states and 5821 transitions. [2021-02-19 17:24:09,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 5821 transitions. [2021-02-19 17:24:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:09,228 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:09,228 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:09,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-02-19 17:24:09,429 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1335337384, now seen corresponding path program 176 times [2021-02-19 17:24:09,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:09,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172004782] [2021-02-19 17:24:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:09,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172004782] [2021-02-19 17:24:09,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960100138] [2021-02-19 17:24:09,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:09,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:09,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:09,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:09,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:09,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:09,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2021-02-19 17:24:09,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643288244] [2021-02-19 17:24:09,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:09,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:09,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:09,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:09,581 INFO L87 Difference]: Start difference. First operand 2075 states and 5821 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:09,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:09,741 INFO L93 Difference]: Finished difference Result 2349 states and 6315 transitions. [2021-02-19 17:24:09,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:24:09,742 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:09,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:09,744 INFO L225 Difference]: With dead ends: 2349 [2021-02-19 17:24:09,744 INFO L226 Difference]: Without dead ends: 2339 [2021-02-19 17:24:09,744 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:24:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2021-02-19 17:24:09,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2089. [2021-02-19 17:24:09,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 2.8045977011494254) internal successors, (5856), 2088 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:09,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 5856 transitions. [2021-02-19 17:24:09,765 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 5856 transitions. Word has length 20 [2021-02-19 17:24:09,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:09,765 INFO L480 AbstractCegarLoop]: Abstraction has 2089 states and 5856 transitions. [2021-02-19 17:24:09,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 5856 transitions. [2021-02-19 17:24:09,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:09,767 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:09,767 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:09,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-02-19 17:24:09,988 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:09,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:09,988 INFO L82 PathProgramCache]: Analyzing trace with hash 490365932, now seen corresponding path program 177 times [2021-02-19 17:24:09,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:09,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776240609] [2021-02-19 17:24:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:10,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776240609] [2021-02-19 17:24:10,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158246495] [2021-02-19 17:24:10,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:10,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:24:10,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:10,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:24:10,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:10,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:10,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-02-19 17:24:10,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12852147] [2021-02-19 17:24:10,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:10,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:10,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:10,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:10,149 INFO L87 Difference]: Start difference. First operand 2089 states and 5856 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:10,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:10,348 INFO L93 Difference]: Finished difference Result 2599 states and 6995 transitions. [2021-02-19 17:24:10,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:24:10,348 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:10,351 INFO L225 Difference]: With dead ends: 2599 [2021-02-19 17:24:10,351 INFO L226 Difference]: Without dead ends: 2587 [2021-02-19 17:24:10,351 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:24:10,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-02-19 17:24:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2089. [2021-02-19 17:24:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 2.803639846743295) internal successors, (5854), 2088 states have internal predecessors, (5854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 5854 transitions. [2021-02-19 17:24:10,374 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 5854 transitions. Word has length 20 [2021-02-19 17:24:10,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:10,374 INFO L480 AbstractCegarLoop]: Abstraction has 2089 states and 5854 transitions. [2021-02-19 17:24:10,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:10,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 5854 transitions. [2021-02-19 17:24:10,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:10,375 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:10,375 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:10,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:10,576 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:10,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:10,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1808871814, now seen corresponding path program 178 times [2021-02-19 17:24:10,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:10,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757124135] [2021-02-19 17:24:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:10,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757124135] [2021-02-19 17:24:10,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260275857] [2021-02-19 17:24:10,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:10,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:10,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:10,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:24:10,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:10,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:10,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-02-19 17:24:10,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900883616] [2021-02-19 17:24:10,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:10,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:10,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:10,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:10,728 INFO L87 Difference]: Start difference. First operand 2089 states and 5854 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:10,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:10,825 INFO L93 Difference]: Finished difference Result 2406 states and 6483 transitions. [2021-02-19 17:24:10,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:24:10,825 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:10,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:10,827 INFO L225 Difference]: With dead ends: 2406 [2021-02-19 17:24:10,827 INFO L226 Difference]: Without dead ends: 2406 [2021-02-19 17:24:10,827 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:24:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-02-19 17:24:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2159. [2021-02-19 17:24:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 2.824374420759963) internal successors, (6095), 2158 states have internal predecessors, (6095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 6095 transitions. [2021-02-19 17:24:10,847 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 6095 transitions. Word has length 20 [2021-02-19 17:24:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:10,847 INFO L480 AbstractCegarLoop]: Abstraction has 2159 states and 6095 transitions. [2021-02-19 17:24:10,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:10,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 6095 transitions. [2021-02-19 17:24:10,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:10,849 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:10,849 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:11,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:11,049 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:11,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1268924730, now seen corresponding path program 179 times [2021-02-19 17:24:11,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:11,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155773681] [2021-02-19 17:24:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:11,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155773681] [2021-02-19 17:24:11,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690974225] [2021-02-19 17:24:11,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:11,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:24:11,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:11,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:11,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:11,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:11,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-02-19 17:24:11,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443928346] [2021-02-19 17:24:11,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:24:11,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:11,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:24:11,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:24:11,200 INFO L87 Difference]: Start difference. First operand 2159 states and 6095 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:11,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:11,384 INFO L93 Difference]: Finished difference Result 2698 states and 7329 transitions. [2021-02-19 17:24:11,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:24:11,384 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:11,386 INFO L225 Difference]: With dead ends: 2698 [2021-02-19 17:24:11,386 INFO L226 Difference]: Without dead ends: 2686 [2021-02-19 17:24:11,387 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:24:11,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-02-19 17:24:11,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2159. [2021-02-19 17:24:11,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 2.823447636700649) internal successors, (6093), 2158 states have internal predecessors, (6093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 6093 transitions. [2021-02-19 17:24:11,408 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 6093 transitions. Word has length 20 [2021-02-19 17:24:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:11,408 INFO L480 AbstractCegarLoop]: Abstraction has 2159 states and 6093 transitions. [2021-02-19 17:24:11,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 6093 transitions. [2021-02-19 17:24:11,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:11,410 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:11,410 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:11,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-02-19 17:24:11,610 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:11,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:11,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1091797962, now seen corresponding path program 180 times [2021-02-19 17:24:11,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:11,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641330780] [2021-02-19 17:24:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:11,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641330780] [2021-02-19 17:24:11,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341507147] [2021-02-19 17:24:11,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:11,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:24:11,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:11,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:11,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:11,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:11,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-02-19 17:24:11,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79347845] [2021-02-19 17:24:11,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:11,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:11,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:11,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:11,763 INFO L87 Difference]: Start difference. First operand 2159 states and 6093 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:11,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:11,856 INFO L93 Difference]: Finished difference Result 2654 states and 7217 transitions. [2021-02-19 17:24:11,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:24:11,856 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:11,860 INFO L225 Difference]: With dead ends: 2654 [2021-02-19 17:24:11,860 INFO L226 Difference]: Without dead ends: 2654 [2021-02-19 17:24:11,860 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:24:11,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2021-02-19 17:24:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2377. [2021-02-19 17:24:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.8585858585858586) internal successors, (6792), 2376 states have internal predecessors, (6792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:11,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 6792 transitions. [2021-02-19 17:24:11,909 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 6792 transitions. Word has length 20 [2021-02-19 17:24:11,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:11,909 INFO L480 AbstractCegarLoop]: Abstraction has 2377 states and 6792 transitions. [2021-02-19 17:24:11,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 6792 transitions. [2021-02-19 17:24:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:11,912 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:11,912 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:12,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:12,126 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:12,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:12,126 INFO L82 PathProgramCache]: Analyzing trace with hash 252898664, now seen corresponding path program 181 times [2021-02-19 17:24:12,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:12,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813335609] [2021-02-19 17:24:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:12,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813335609] [2021-02-19 17:24:12,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167109666] [2021-02-19 17:24:12,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:12,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:12,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:12,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:12,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-02-19 17:24:12,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059088714] [2021-02-19 17:24:12,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:12,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:12,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:12,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:12,278 INFO L87 Difference]: Start difference. First operand 2377 states and 6792 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:12,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:12,407 INFO L93 Difference]: Finished difference Result 2604 states and 7116 transitions. [2021-02-19 17:24:12,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:24:12,408 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:12,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:12,410 INFO L225 Difference]: With dead ends: 2604 [2021-02-19 17:24:12,410 INFO L226 Difference]: Without dead ends: 2602 [2021-02-19 17:24:12,410 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:24:12,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-02-19 17:24:12,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2377. [2021-02-19 17:24:12,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.8577441077441077) internal successors, (6790), 2376 states have internal predecessors, (6790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:12,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 6790 transitions. [2021-02-19 17:24:12,433 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 6790 transitions. Word has length 20 [2021-02-19 17:24:12,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:12,433 INFO L480 AbstractCegarLoop]: Abstraction has 2377 states and 6790 transitions. [2021-02-19 17:24:12,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:12,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 6790 transitions. [2021-02-19 17:24:12,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:12,435 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:12,435 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:12,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable637 [2021-02-19 17:24:12,635 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:12,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1742303660, now seen corresponding path program 182 times [2021-02-19 17:24:12,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:12,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938426397] [2021-02-19 17:24:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:12,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938426397] [2021-02-19 17:24:12,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701455586] [2021-02-19 17:24:12,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:12,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:12,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:12,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:12,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:12,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:12,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-02-19 17:24:12,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607798128] [2021-02-19 17:24:12,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:12,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:12,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:12,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:12,790 INFO L87 Difference]: Start difference. First operand 2377 states and 6790 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:12,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:12,934 INFO L93 Difference]: Finished difference Result 2610 states and 7122 transitions. [2021-02-19 17:24:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:24:12,935 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:12,937 INFO L225 Difference]: With dead ends: 2610 [2021-02-19 17:24:12,937 INFO L226 Difference]: Without dead ends: 2606 [2021-02-19 17:24:12,937 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:24:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-02-19 17:24:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2384. [2021-02-19 17:24:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 2.8590012589173313) internal successors, (6813), 2383 states have internal predecessors, (6813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:12,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 6813 transitions. [2021-02-19 17:24:12,959 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 6813 transitions. Word has length 20 [2021-02-19 17:24:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:12,959 INFO L480 AbstractCegarLoop]: Abstraction has 2384 states and 6813 transitions. [2021-02-19 17:24:12,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 6813 transitions. [2021-02-19 17:24:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:12,961 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:12,961 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:13,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:13,162 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:13,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:13,162 INFO L82 PathProgramCache]: Analyzing trace with hash 669218280, now seen corresponding path program 183 times [2021-02-19 17:24:13,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:13,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856080084] [2021-02-19 17:24:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:13,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856080084] [2021-02-19 17:24:13,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379290473] [2021-02-19 17:24:13,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:13,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:24:13,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:24:13,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:13,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:13,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-02-19 17:24:13,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271354356] [2021-02-19 17:24:13,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:13,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:13,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:13,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:13,352 INFO L87 Difference]: Start difference. First operand 2384 states and 6813 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:13,506 INFO L93 Difference]: Finished difference Result 3294 states and 9028 transitions. [2021-02-19 17:24:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:24:13,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:13,509 INFO L225 Difference]: With dead ends: 3294 [2021-02-19 17:24:13,509 INFO L226 Difference]: Without dead ends: 3288 [2021-02-19 17:24:13,509 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:24:13,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-02-19 17:24:13,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2384. [2021-02-19 17:24:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 2.8569030633655057) internal successors, (6808), 2383 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 6808 transitions. [2021-02-19 17:24:13,534 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 6808 transitions. Word has length 20 [2021-02-19 17:24:13,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:13,534 INFO L480 AbstractCegarLoop]: Abstraction has 2384 states and 6808 transitions. [2021-02-19 17:24:13,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 6808 transitions. [2021-02-19 17:24:13,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:13,536 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:13,536 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:13,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable639 [2021-02-19 17:24:13,736 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:13,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:13,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1763309868, now seen corresponding path program 184 times [2021-02-19 17:24:13,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:13,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185773062] [2021-02-19 17:24:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:13,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185773062] [2021-02-19 17:24:13,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671737679] [2021-02-19 17:24:13,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:13,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:13,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:13,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:13,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:13,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:13,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-02-19 17:24:13,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062224940] [2021-02-19 17:24:13,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:24:13,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:13,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:24:13,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:24:13,888 INFO L87 Difference]: Start difference. First operand 2384 states and 6808 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:14,048 INFO L93 Difference]: Finished difference Result 3310 states and 9043 transitions. [2021-02-19 17:24:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:24:14,049 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:14,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:14,051 INFO L225 Difference]: With dead ends: 3310 [2021-02-19 17:24:14,052 INFO L226 Difference]: Without dead ends: 3302 [2021-02-19 17:24:14,052 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:24:14,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2021-02-19 17:24:14,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 2400. [2021-02-19 17:24:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.8561900791996666) internal successors, (6852), 2399 states have internal predecessors, (6852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6852 transitions. [2021-02-19 17:24:14,077 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6852 transitions. Word has length 20 [2021-02-19 17:24:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:14,077 INFO L480 AbstractCegarLoop]: Abstraction has 2400 states and 6852 transitions. [2021-02-19 17:24:14,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6852 transitions. [2021-02-19 17:24:14,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:14,078 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:14,078 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:14,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-02-19 17:24:14,279 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:14,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:14,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1320410728, now seen corresponding path program 185 times [2021-02-19 17:24:14,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:14,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380979501] [2021-02-19 17:24:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:14,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380979501] [2021-02-19 17:24:14,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403336954] [2021-02-19 17:24:14,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:14,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:24:14,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:14,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:14,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:14,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:14,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 16 [2021-02-19 17:24:14,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573791849] [2021-02-19 17:24:14,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:24:14,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:14,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:24:14,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:24:14,470 INFO L87 Difference]: Start difference. First operand 2400 states and 6852 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:14,668 INFO L93 Difference]: Finished difference Result 3177 states and 8735 transitions. [2021-02-19 17:24:14,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:24:14,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:14,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:14,672 INFO L225 Difference]: With dead ends: 3177 [2021-02-19 17:24:14,672 INFO L226 Difference]: Without dead ends: 3167 [2021-02-19 17:24:14,672 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:24:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2021-02-19 17:24:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 2400. [2021-02-19 17:24:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.855356398499375) internal successors, (6850), 2399 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6850 transitions. [2021-02-19 17:24:14,709 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6850 transitions. Word has length 20 [2021-02-19 17:24:14,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:14,709 INFO L480 AbstractCegarLoop]: Abstraction has 2400 states and 6850 transitions. [2021-02-19 17:24:14,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:14,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6850 transitions. [2021-02-19 17:24:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:14,711 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:14,711 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:14,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-02-19 17:24:14,930 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:14,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:14,931 INFO L82 PathProgramCache]: Analyzing trace with hash 475439276, now seen corresponding path program 186 times [2021-02-19 17:24:14,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:14,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113994730] [2021-02-19 17:24:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:15,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113994730] [2021-02-19 17:24:15,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905487400] [2021-02-19 17:24:15,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:15,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:24:15,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:15,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:15,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:15,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:15,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-02-19 17:24:15,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864782956] [2021-02-19 17:24:15,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:24:15,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:15,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:24:15,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:24:15,115 INFO L87 Difference]: Start difference. First operand 2400 states and 6850 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:15,285 INFO L93 Difference]: Finished difference Result 3198 states and 8756 transitions. [2021-02-19 17:24:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:24:15,286 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:15,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:15,289 INFO L225 Difference]: With dead ends: 3198 [2021-02-19 17:24:15,289 INFO L226 Difference]: Without dead ends: 3186 [2021-02-19 17:24:15,289 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:24:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-02-19 17:24:15,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2406. [2021-02-19 17:24:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 2.854885654885655) internal successors, (6866), 2405 states have internal predecessors, (6866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:15,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 6866 transitions. [2021-02-19 17:24:15,314 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 6866 transitions. Word has length 20 [2021-02-19 17:24:15,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:15,315 INFO L480 AbstractCegarLoop]: Abstraction has 2406 states and 6866 transitions. [2021-02-19 17:24:15,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:15,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 6866 transitions. [2021-02-19 17:24:15,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 17:24:15,316 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:15,316 INFO L506 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:15,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-02-19 17:24:15,517 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:15,517 INFO L82 PathProgramCache]: Analyzing trace with hash 51128040, now seen corresponding path program 187 times [2021-02-19 17:24:15,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:15,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556519446] [2021-02-19 17:24:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:15,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556519446] [2021-02-19 17:24:15,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527518530] [2021-02-19 17:24:15,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:15,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:24:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:15,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:15,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-02-19 17:24:15,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713674415] [2021-02-19 17:24:15,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:24:15,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:15,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:24:15,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:24:15,707 INFO L87 Difference]: Start difference. First operand 2406 states and 6866 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:15,877 INFO L93 Difference]: Finished difference Result 2595 states and 7303 transitions. [2021-02-19 17:24:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:24:15,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-02-19 17:24:15,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:15,880 INFO L225 Difference]: With dead ends: 2595 [2021-02-19 17:24:15,880 INFO L226 Difference]: Without dead ends: 2588 [2021-02-19 17:24:15,880 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:24:15,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-02-19 17:24:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2406. [2021-02-19 17:24:15,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 2.8544698544698544) internal successors, (6865), 2405 states have internal predecessors, (6865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 6865 transitions. [2021-02-19 17:24:15,901 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 6865 transitions. Word has length 20 [2021-02-19 17:24:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:15,901 INFO L480 AbstractCegarLoop]: Abstraction has 2406 states and 6865 transitions. [2021-02-19 17:24:15,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 6865 transitions. [2021-02-19 17:24:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:24:15,903 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:15,903 INFO L506 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:16,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:16,117 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:16,117 INFO L82 PathProgramCache]: Analyzing trace with hash -3171641, now seen corresponding path program 188 times [2021-02-19 17:24:16,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:16,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356927467] [2021-02-19 17:24:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:16,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356927467] [2021-02-19 17:24:16,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197821380] [2021-02-19 17:24:16,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:16,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:16,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:16,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:24:16,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:16,481 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-02-19 17:24:16,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:16,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-02-19 17:24:19,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:24:19,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:19,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:24:19,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-02-19 17:24:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:19,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:19,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-02-19 17:24:19,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308942368] [2021-02-19 17:24:19,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:24:19,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:19,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:24:19,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:19,094 INFO L87 Difference]: Start difference. First operand 2406 states and 6865 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:19,262 INFO L93 Difference]: Finished difference Result 2577 states and 7207 transitions. [2021-02-19 17:24:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:24:19,262 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:24:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:19,265 INFO L225 Difference]: With dead ends: 2577 [2021-02-19 17:24:19,265 INFO L226 Difference]: Without dead ends: 2574 [2021-02-19 17:24:19,265 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:19,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-02-19 17:24:19,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2471. [2021-02-19 17:24:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2470 states have (on average 2.857894736842105) internal successors, (7059), 2470 states have internal predecessors, (7059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:19,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 7059 transitions. [2021-02-19 17:24:19,287 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 7059 transitions. Word has length 21 [2021-02-19 17:24:19,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:19,287 INFO L480 AbstractCegarLoop]: Abstraction has 2471 states and 7059 transitions. [2021-02-19 17:24:19,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:19,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 7059 transitions. [2021-02-19 17:24:19,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:24:19,289 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:19,289 INFO L506 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:19,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable644 [2021-02-19 17:24:19,490 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:19,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:19,490 INFO L82 PathProgramCache]: Analyzing trace with hash -332243355, now seen corresponding path program 189 times [2021-02-19 17:24:19,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:19,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179758709] [2021-02-19 17:24:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:19,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179758709] [2021-02-19 17:24:19,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090677281] [2021-02-19 17:24:19,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:19,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:24:19,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:19,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:24:19,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:19,861 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-02-19 17:24:19,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:19,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-02-19 17:24:20,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:24:20,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:20,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:24:20,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-02-19 17:24:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:20,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:20,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-02-19 17:24:20,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961397311] [2021-02-19 17:24:20,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:24:20,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:20,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:24:20,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:20,523 INFO L87 Difference]: Start difference. First operand 2471 states and 7059 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:20,732 INFO L93 Difference]: Finished difference Result 2677 states and 7464 transitions. [2021-02-19 17:24:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:24:20,732 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:24:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:20,735 INFO L225 Difference]: With dead ends: 2677 [2021-02-19 17:24:20,735 INFO L226 Difference]: Without dead ends: 2674 [2021-02-19 17:24:20,735 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:20,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2021-02-19 17:24:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2523. [2021-02-19 17:24:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 2522 states have (on average 2.8691514670896114) internal successors, (7236), 2522 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:20,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 7236 transitions. [2021-02-19 17:24:20,759 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 7236 transitions. Word has length 21 [2021-02-19 17:24:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:20,760 INFO L480 AbstractCegarLoop]: Abstraction has 2523 states and 7236 transitions. [2021-02-19 17:24:20,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:20,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 7236 transitions. [2021-02-19 17:24:20,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:24:20,762 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:20,762 INFO L506 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:20,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1371,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:20,962 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:20,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:20,962 INFO L82 PathProgramCache]: Analyzing trace with hash 459108307, now seen corresponding path program 190 times [2021-02-19 17:24:20,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:20,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211779739] [2021-02-19 17:24:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:21,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211779739] [2021-02-19 17:24:21,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046691714] [2021-02-19 17:24:21,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:21,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:21,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:21,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:24:21,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:21,331 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-02-19 17:24:21,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:21,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-02-19 17:24:21,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:24:21,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:21,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:24:21,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-02-19 17:24:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:21,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:21,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-02-19 17:24:21,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682096140] [2021-02-19 17:24:21,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:24:21,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:21,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:24:21,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:21,765 INFO L87 Difference]: Start difference. First operand 2523 states and 7236 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:22,025 INFO L93 Difference]: Finished difference Result 2731 states and 7647 transitions. [2021-02-19 17:24:22,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:24:22,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:24:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:22,029 INFO L225 Difference]: With dead ends: 2731 [2021-02-19 17:24:22,029 INFO L226 Difference]: Without dead ends: 2728 [2021-02-19 17:24:22,029 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:22,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-02-19 17:24:22,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2576. [2021-02-19 17:24:22,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2575 states have (on average 2.8811650485436893) internal successors, (7419), 2575 states have internal predecessors, (7419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 7419 transitions. [2021-02-19 17:24:22,058 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 7419 transitions. Word has length 21 [2021-02-19 17:24:22,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:22,058 INFO L480 AbstractCegarLoop]: Abstraction has 2576 states and 7419 transitions. [2021-02-19 17:24:22,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 7419 transitions. [2021-02-19 17:24:22,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:24:22,059 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:22,059 INFO L506 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:22,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1567,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:22,260 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:22,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:22,261 INFO L82 PathProgramCache]: Analyzing trace with hash -778793947, now seen corresponding path program 191 times [2021-02-19 17:24:22,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:22,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299278074] [2021-02-19 17:24:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:22,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299278074] [2021-02-19 17:24:22,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968872087] [2021-02-19 17:24:22,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:22,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:24:22,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:22,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:24:22,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:22,637 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-02-19 17:24:22,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:22,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-02-19 17:24:23,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:24:23,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:23,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:24:23,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-02-19 17:24:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:23,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:23,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-02-19 17:24:23,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928569137] [2021-02-19 17:24:23,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:24:23,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:23,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:24:23,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:23,399 INFO L87 Difference]: Start difference. First operand 2576 states and 7419 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:23,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:23,669 INFO L93 Difference]: Finished difference Result 2805 states and 7890 transitions. [2021-02-19 17:24:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:24:23,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:24:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:23,672 INFO L225 Difference]: With dead ends: 2805 [2021-02-19 17:24:23,672 INFO L226 Difference]: Without dead ends: 2802 [2021-02-19 17:24:23,672 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:23,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2021-02-19 17:24:23,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2637. [2021-02-19 17:24:23,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2636 states have (on average 2.8979514415781487) internal successors, (7639), 2636 states have internal predecessors, (7639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:23,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 7639 transitions. [2021-02-19 17:24:23,697 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 7639 transitions. Word has length 21 [2021-02-19 17:24:23,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:23,697 INFO L480 AbstractCegarLoop]: Abstraction has 2637 states and 7639 transitions. [2021-02-19 17:24:23,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 7639 transitions. [2021-02-19 17:24:23,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:24:23,699 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:23,699 INFO L506 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:23,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1758 [2021-02-19 17:24:23,900 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:23,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:23,900 INFO L82 PathProgramCache]: Analyzing trace with hash -499058157, now seen corresponding path program 192 times [2021-02-19 17:24:23,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:23,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583922510] [2021-02-19 17:24:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:23,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583922510] [2021-02-19 17:24:23,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84871905] [2021-02-19 17:24:23,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:23,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:24:23,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:23,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:24:23,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:24,285 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-02-19 17:24:24,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:24,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-02-19 17:24:24,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:24:24,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:24,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:24:24,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-02-19 17:24:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:24,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:24,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-02-19 17:24:24,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39734495] [2021-02-19 17:24:24,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:24:24,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:24,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:24:24,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:24,716 INFO L87 Difference]: Start difference. First operand 2637 states and 7639 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:24,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:24,982 INFO L93 Difference]: Finished difference Result 2898 states and 8208 transitions. [2021-02-19 17:24:24,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:24:24,983 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:24:24,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:24,986 INFO L225 Difference]: With dead ends: 2898 [2021-02-19 17:24:24,986 INFO L226 Difference]: Without dead ends: 2895 [2021-02-19 17:24:24,986 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2021-02-19 17:24:25,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2727. [2021-02-19 17:24:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 2.9200293470286134) internal successors, (7960), 2726 states have internal predecessors, (7960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:25,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 7960 transitions. [2021-02-19 17:24:25,014 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 7960 transitions. Word has length 21 [2021-02-19 17:24:25,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:25,015 INFO L480 AbstractCegarLoop]: Abstraction has 2727 states and 7960 transitions. [2021-02-19 17:24:25,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:25,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 7960 transitions. [2021-02-19 17:24:25,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:24:25,018 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:25,018 INFO L506 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:25,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2106,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:25,218 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:25,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:25,218 INFO L82 PathProgramCache]: Analyzing trace with hash -417183259, now seen corresponding path program 193 times [2021-02-19 17:24:25,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:25,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145852532] [2021-02-19 17:24:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:25,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145852532] [2021-02-19 17:24:25,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659772066] [2021-02-19 17:24:25,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:25,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:24:25,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:25,651 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-02-19 17:24:25,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:25,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-02-19 17:24:26,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:24:26,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:26,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:24:26,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-02-19 17:24:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:26,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:26,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-02-19 17:24:26,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641979911] [2021-02-19 17:24:26,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:24:26,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:26,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:24:26,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:26,067 INFO L87 Difference]: Start difference. First operand 2727 states and 7960 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:26,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:26,338 INFO L93 Difference]: Finished difference Result 2991 states and 8531 transitions. [2021-02-19 17:24:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:24:26,339 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:24:26,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:26,342 INFO L225 Difference]: With dead ends: 2991 [2021-02-19 17:24:26,342 INFO L226 Difference]: Without dead ends: 2988 [2021-02-19 17:24:26,342 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2021-02-19 17:24:26,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2816. [2021-02-19 17:24:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2815 states have (on average 2.941740674955595) internal successors, (8281), 2815 states have internal predecessors, (8281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 8281 transitions. [2021-02-19 17:24:26,378 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 8281 transitions. Word has length 21 [2021-02-19 17:24:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:26,378 INFO L480 AbstractCegarLoop]: Abstraction has 2816 states and 8281 transitions. [2021-02-19 17:24:26,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 8281 transitions. [2021-02-19 17:24:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:24:26,380 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:26,380 INFO L506 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:26,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2269 [2021-02-19 17:24:26,582 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:26,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:26,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2120938579, now seen corresponding path program 194 times [2021-02-19 17:24:26,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:26,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037923316] [2021-02-19 17:24:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:26,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037923316] [2021-02-19 17:24:26,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411127231] [2021-02-19 17:24:26,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:26,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:26,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:26,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:24:26,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:26,964 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-02-19 17:24:26,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:26,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-02-19 17:24:27,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:24:27,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:27,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:24:27,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-02-19 17:24:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:27,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:27,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-02-19 17:24:27,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257062471] [2021-02-19 17:24:27,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:24:27,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:27,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:24:27,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:27,703 INFO L87 Difference]: Start difference. First operand 2816 states and 8281 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:28,018 INFO L93 Difference]: Finished difference Result 3135 states and 9032 transitions. [2021-02-19 17:24:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:24:28,018 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:24:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:28,022 INFO L225 Difference]: With dead ends: 3135 [2021-02-19 17:24:28,022 INFO L226 Difference]: Without dead ends: 3132 [2021-02-19 17:24:28,022 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-02-19 17:24:28,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 2975. [2021-02-19 17:24:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 2.964357767316745) internal successors, (8816), 2974 states have internal predecessors, (8816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 8816 transitions. [2021-02-19 17:24:28,051 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 8816 transitions. Word has length 21 [2021-02-19 17:24:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:28,051 INFO L480 AbstractCegarLoop]: Abstraction has 2975 states and 8816 transitions. [2021-02-19 17:24:28,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 8816 transitions. [2021-02-19 17:24:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:24:28,054 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:28,054 INFO L506 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:28,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2423 [2021-02-19 17:24:28,254 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:28,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:28,255 INFO L82 PathProgramCache]: Analyzing trace with hash -801663067, now seen corresponding path program 195 times [2021-02-19 17:24:28,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:28,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231520085] [2021-02-19 17:24:28,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:28,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231520085] [2021-02-19 17:24:28,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119174701] [2021-02-19 17:24:28,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:28,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:24:28,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:28,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:24:28,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:28,656 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-02-19 17:24:28,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:28,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-02-19 17:24:29,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:24:29,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:29,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:24:29,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-02-19 17:24:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:29,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:29,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-02-19 17:24:29,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744830659] [2021-02-19 17:24:29,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:24:29,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:29,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:24:29,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:29,253 INFO L87 Difference]: Start difference. First operand 2975 states and 8816 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:29,490 INFO L93 Difference]: Finished difference Result 3621 states and 10506 transitions. [2021-02-19 17:24:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:24:29,490 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:24:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:29,494 INFO L225 Difference]: With dead ends: 3621 [2021-02-19 17:24:29,494 INFO L226 Difference]: Without dead ends: 3618 [2021-02-19 17:24:29,494 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:29,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-02-19 17:24:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 3462. [2021-02-19 17:24:29,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3462 states, 3461 states have (on average 2.9763074255995376) internal successors, (10301), 3461 states have internal predecessors, (10301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:29,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 10301 transitions. [2021-02-19 17:24:29,529 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 10301 transitions. Word has length 21 [2021-02-19 17:24:29,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:29,529 INFO L480 AbstractCegarLoop]: Abstraction has 3462 states and 10301 transitions. [2021-02-19 17:24:29,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:29,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 10301 transitions. [2021-02-19 17:24:29,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:24:29,531 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:29,532 INFO L506 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:29,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2744 [2021-02-19 17:24:29,732 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:29,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1208000877, now seen corresponding path program 196 times [2021-02-19 17:24:29,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:29,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455436614] [2021-02-19 17:24:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:29,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455436614] [2021-02-19 17:24:29,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468001633] [2021-02-19 17:24:29,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:29,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:29,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:29,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:24:29,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:30,101 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-02-19 17:24:30,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:30,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-02-19 17:24:30,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:24:30,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:24:30,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:24:30,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-02-19 17:24:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:30,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:30,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-02-19 17:24:30,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337031033] [2021-02-19 17:24:30,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:24:30,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:30,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:24:30,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:30,808 INFO L87 Difference]: Start difference. First operand 3462 states and 10301 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:31,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:31,057 INFO L93 Difference]: Finished difference Result 4028 states and 11754 transitions. [2021-02-19 17:24:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:24:31,057 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:24:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:31,062 INFO L225 Difference]: With dead ends: 4028 [2021-02-19 17:24:31,062 INFO L226 Difference]: Without dead ends: 4025 [2021-02-19 17:24:31,062 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4025 states. [2021-02-19 17:24:31,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4025 to 3877. [2021-02-19 17:24:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3877 states, 3876 states have (on average 2.9827141382868936) internal successors, (11561), 3876 states have internal predecessors, (11561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:31,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3877 states to 3877 states and 11561 transitions. [2021-02-19 17:24:31,106 INFO L78 Accepts]: Start accepts. Automaton has 3877 states and 11561 transitions. Word has length 21 [2021-02-19 17:24:31,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:31,106 INFO L480 AbstractCegarLoop]: Abstraction has 3877 states and 11561 transitions. [2021-02-19 17:24:31,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3877 states and 11561 transitions. [2021-02-19 17:24:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:31,110 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:31,110 INFO L506 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:31,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2955 [2021-02-19 17:24:31,310 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:31,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:31,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1201390473, now seen corresponding path program 197 times [2021-02-19 17:24:31,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:31,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46703594] [2021-02-19 17:24:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:31,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46703594] [2021-02-19 17:24:31,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101028199] [2021-02-19 17:24:31,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:31,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:24:31,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:31,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:31,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:31,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:31,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:24:31,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399596228] [2021-02-19 17:24:31,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:24:31,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:31,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:24:31,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:24:31,473 INFO L87 Difference]: Start difference. First operand 3877 states and 11561 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:31,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:31,676 INFO L93 Difference]: Finished difference Result 4054 states and 11820 transitions. [2021-02-19 17:24:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:24:31,676 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:31,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:31,680 INFO L225 Difference]: With dead ends: 4054 [2021-02-19 17:24:31,680 INFO L226 Difference]: Without dead ends: 4054 [2021-02-19 17:24:31,680 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=286, Invalid=584, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:24:31,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2021-02-19 17:24:31,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 3845. [2021-02-19 17:24:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3845 states, 3844 states have (on average 2.980228928199792) internal successors, (11456), 3844 states have internal predecessors, (11456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3845 states to 3845 states and 11456 transitions. [2021-02-19 17:24:31,722 INFO L78 Accepts]: Start accepts. Automaton has 3845 states and 11456 transitions. Word has length 22 [2021-02-19 17:24:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:31,722 INFO L480 AbstractCegarLoop]: Abstraction has 3845 states and 11456 transitions. [2021-02-19 17:24:31,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:31,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3845 states and 11456 transitions. [2021-02-19 17:24:31,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:31,725 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:31,725 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:31,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3206,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:31,926 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:31,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:31,926 INFO L82 PathProgramCache]: Analyzing trace with hash -75246350, now seen corresponding path program 198 times [2021-02-19 17:24:31,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:31,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373970720] [2021-02-19 17:24:31,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:32,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373970720] [2021-02-19 17:24:32,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536035735] [2021-02-19 17:24:32,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:32,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:24:32,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:32,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:32,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:32,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:32,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:24:32,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711895294] [2021-02-19 17:24:32,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:24:32,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:32,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:24:32,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:24:32,080 INFO L87 Difference]: Start difference. First operand 3845 states and 11456 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:32,363 INFO L93 Difference]: Finished difference Result 4225 states and 12044 transitions. [2021-02-19 17:24:32,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:24:32,364 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:32,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:32,368 INFO L225 Difference]: With dead ends: 4225 [2021-02-19 17:24:32,368 INFO L226 Difference]: Without dead ends: 4214 [2021-02-19 17:24:32,369 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=374, Invalid=748, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:24:32,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4214 states. [2021-02-19 17:24:32,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4214 to 3872. [2021-02-19 17:24:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3872 states, 3871 states have (on average 2.9752002066649443) internal successors, (11517), 3871 states have internal predecessors, (11517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 11517 transitions. [2021-02-19 17:24:32,414 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 11517 transitions. Word has length 22 [2021-02-19 17:24:32,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:32,414 INFO L480 AbstractCegarLoop]: Abstraction has 3872 states and 11517 transitions. [2021-02-19 17:24:32,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 11517 transitions. [2021-02-19 17:24:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:32,417 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:32,417 INFO L506 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:32,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3207 [2021-02-19 17:24:32,618 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:32,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:32,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1677193847, now seen corresponding path program 199 times [2021-02-19 17:24:32,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:32,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683571439] [2021-02-19 17:24:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:32,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683571439] [2021-02-19 17:24:32,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527113370] [2021-02-19 17:24:32,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:32,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:32,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:32,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:32,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:32,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048746962] [2021-02-19 17:24:32,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:32,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:32,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:32,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:32,737 INFO L87 Difference]: Start difference. First operand 3872 states and 11517 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:32,883 INFO L93 Difference]: Finished difference Result 3911 states and 11572 transitions. [2021-02-19 17:24:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:24:32,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:32,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:32,887 INFO L225 Difference]: With dead ends: 3911 [2021-02-19 17:24:32,887 INFO L226 Difference]: Without dead ends: 3910 [2021-02-19 17:24:32,887 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:24:32,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2021-02-19 17:24:32,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 3872. [2021-02-19 17:24:32,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3872 states, 3871 states have (on average 2.9746835443037973) internal successors, (11515), 3871 states have internal predecessors, (11515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 11515 transitions. [2021-02-19 17:24:32,951 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 11515 transitions. Word has length 22 [2021-02-19 17:24:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:32,951 INFO L480 AbstractCegarLoop]: Abstraction has 3872 states and 11515 transitions. [2021-02-19 17:24:32,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 11515 transitions. [2021-02-19 17:24:32,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:32,954 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:32,954 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:33,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3208,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:33,154 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:33,155 INFO L82 PathProgramCache]: Analyzing trace with hash -760137494, now seen corresponding path program 200 times [2021-02-19 17:24:33,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:33,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840936255] [2021-02-19 17:24:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:33,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840936255] [2021-02-19 17:24:33,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950649152] [2021-02-19 17:24:33,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:33,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:33,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:33,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:33,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:33,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:33,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:33,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669773334] [2021-02-19 17:24:33,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:33,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:33,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:33,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:33,279 INFO L87 Difference]: Start difference. First operand 3872 states and 11515 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:33,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:33,347 INFO L93 Difference]: Finished difference Result 4333 states and 12337 transitions. [2021-02-19 17:24:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:24:33,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:33,351 INFO L225 Difference]: With dead ends: 4333 [2021-02-19 17:24:33,351 INFO L226 Difference]: Without dead ends: 4333 [2021-02-19 17:24:33,351 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:33,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-02-19 17:24:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3849. [2021-02-19 17:24:33,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 3848 states have (on average 2.9701143451143452) internal successors, (11429), 3848 states have internal predecessors, (11429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 11429 transitions. [2021-02-19 17:24:33,389 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 11429 transitions. Word has length 22 [2021-02-19 17:24:33,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:33,389 INFO L480 AbstractCegarLoop]: Abstraction has 3849 states and 11429 transitions. [2021-02-19 17:24:33,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 11429 transitions. [2021-02-19 17:24:33,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:33,392 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:33,393 INFO L506 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:33,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3209 [2021-02-19 17:24:33,593 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:33,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:33,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1663670421, now seen corresponding path program 201 times [2021-02-19 17:24:33,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:33,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817786482] [2021-02-19 17:24:33,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:33,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817786482] [2021-02-19 17:24:33,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733846925] [2021-02-19 17:24:33,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:33,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:24:33,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:33,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:33,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:33,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:33,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:33,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792492933] [2021-02-19 17:24:33,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:33,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:33,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:33,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:33,751 INFO L87 Difference]: Start difference. First operand 3849 states and 11429 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:33,866 INFO L93 Difference]: Finished difference Result 4208 states and 12097 transitions. [2021-02-19 17:24:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:24:33,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:33,870 INFO L225 Difference]: With dead ends: 4208 [2021-02-19 17:24:33,870 INFO L226 Difference]: Without dead ends: 4208 [2021-02-19 17:24:33,870 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:24:33,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-02-19 17:24:33,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3886. [2021-02-19 17:24:33,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3885 states have (on average 2.9716859716859716) internal successors, (11545), 3885 states have internal predecessors, (11545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 11545 transitions. [2021-02-19 17:24:33,908 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 11545 transitions. Word has length 22 [2021-02-19 17:24:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:33,908 INFO L480 AbstractCegarLoop]: Abstraction has 3886 states and 11545 transitions. [2021-02-19 17:24:33,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:33,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 11545 transitions. [2021-02-19 17:24:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:33,911 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:33,911 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:34,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3210 [2021-02-19 17:24:34,112 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:34,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:34,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1686534892, now seen corresponding path program 202 times [2021-02-19 17:24:34,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:34,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981347519] [2021-02-19 17:24:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:34,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981347519] [2021-02-19 17:24:34,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385096097] [2021-02-19 17:24:34,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:34,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:34,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:34,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:34,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:34,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:34,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:34,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144668608] [2021-02-19 17:24:34,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:34,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:34,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:34,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:34,229 INFO L87 Difference]: Start difference. First operand 3886 states and 11545 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:34,384 INFO L93 Difference]: Finished difference Result 4223 states and 12052 transitions. [2021-02-19 17:24:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:24:34,384 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:34,388 INFO L225 Difference]: With dead ends: 4223 [2021-02-19 17:24:34,388 INFO L226 Difference]: Without dead ends: 4221 [2021-02-19 17:24:34,388 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:24:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2021-02-19 17:24:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 3896. [2021-02-19 17:24:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3896 states, 3895 states have (on average 2.9727856225930682) internal successors, (11579), 3895 states have internal predecessors, (11579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3896 states to 3896 states and 11579 transitions. [2021-02-19 17:24:34,428 INFO L78 Accepts]: Start accepts. Automaton has 3896 states and 11579 transitions. Word has length 22 [2021-02-19 17:24:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:34,428 INFO L480 AbstractCegarLoop]: Abstraction has 3896 states and 11579 transitions. [2021-02-19 17:24:34,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 3896 states and 11579 transitions. [2021-02-19 17:24:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:34,431 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:34,431 INFO L506 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:34,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3211,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:34,632 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:34,632 INFO L82 PathProgramCache]: Analyzing trace with hash -885842185, now seen corresponding path program 203 times [2021-02-19 17:24:34,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:34,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119905416] [2021-02-19 17:24:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:34,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119905416] [2021-02-19 17:24:34,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205767416] [2021-02-19 17:24:34,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:34,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:24:34,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:34,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:34,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:34,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:34,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:34,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734375651] [2021-02-19 17:24:34,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:34,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:34,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:34,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:34,755 INFO L87 Difference]: Start difference. First operand 3896 states and 11579 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:34,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:34,911 INFO L93 Difference]: Finished difference Result 4092 states and 11872 transitions. [2021-02-19 17:24:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:24:34,911 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:34,915 INFO L225 Difference]: With dead ends: 4092 [2021-02-19 17:24:34,916 INFO L226 Difference]: Without dead ends: 4090 [2021-02-19 17:24:34,916 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:24:34,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-02-19 17:24:34,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3854. [2021-02-19 17:24:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3854 states, 3853 states have (on average 2.969893589410849) internal successors, (11443), 3853 states have internal predecessors, (11443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:34,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 11443 transitions. [2021-02-19 17:24:34,957 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 11443 transitions. Word has length 22 [2021-02-19 17:24:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:34,957 INFO L480 AbstractCegarLoop]: Abstraction has 3854 states and 11443 transitions. [2021-02-19 17:24:34,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:34,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 11443 transitions. [2021-02-19 17:24:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:34,960 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:34,960 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:35,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3212,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:35,161 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:35,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:35,161 INFO L82 PathProgramCache]: Analyzing trace with hash 31214168, now seen corresponding path program 204 times [2021-02-19 17:24:35,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:35,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122888246] [2021-02-19 17:24:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:35,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122888246] [2021-02-19 17:24:35,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115752351] [2021-02-19 17:24:35,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:35,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:24:35,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:35,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:35,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:35,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:35,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:35,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260920589] [2021-02-19 17:24:35,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:35,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:35,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:35,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:35,292 INFO L87 Difference]: Start difference. First operand 3854 states and 11443 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:35,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:35,362 INFO L93 Difference]: Finished difference Result 4302 states and 12177 transitions. [2021-02-19 17:24:35,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:24:35,362 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:35,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:35,366 INFO L225 Difference]: With dead ends: 4302 [2021-02-19 17:24:35,366 INFO L226 Difference]: Without dead ends: 4302 [2021-02-19 17:24:35,366 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:35,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2021-02-19 17:24:35,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 3858. [2021-02-19 17:24:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3858 states, 3857 states have (on average 2.969406274306456) internal successors, (11453), 3857 states have internal predecessors, (11453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:35,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3858 states to 3858 states and 11453 transitions. [2021-02-19 17:24:35,406 INFO L78 Accepts]: Start accepts. Automaton has 3858 states and 11453 transitions. Word has length 22 [2021-02-19 17:24:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:35,406 INFO L480 AbstractCegarLoop]: Abstraction has 3858 states and 11453 transitions. [2021-02-19 17:24:35,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3858 states and 11453 transitions. [2021-02-19 17:24:35,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:35,409 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:35,409 INFO L506 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:35,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3213,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:35,610 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:35,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:35,610 INFO L82 PathProgramCache]: Analyzing trace with hash 824771123, now seen corresponding path program 205 times [2021-02-19 17:24:35,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:35,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591362830] [2021-02-19 17:24:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:35,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591362830] [2021-02-19 17:24:35,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423926037] [2021-02-19 17:24:35,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:35,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:35,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:35,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:35,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-02-19 17:24:35,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666621243] [2021-02-19 17:24:35,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:35,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:35,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:35,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:35,737 INFO L87 Difference]: Start difference. First operand 3858 states and 11453 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:35,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:35,917 INFO L93 Difference]: Finished difference Result 4029 states and 11713 transitions. [2021-02-19 17:24:35,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:24:35,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:35,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:35,921 INFO L225 Difference]: With dead ends: 4029 [2021-02-19 17:24:35,921 INFO L226 Difference]: Without dead ends: 4023 [2021-02-19 17:24:35,921 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:24:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4023 states. [2021-02-19 17:24:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 3815. [2021-02-19 17:24:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3815 states, 3814 states have (on average 2.973518615626639) internal successors, (11341), 3814 states have internal predecessors, (11341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3815 states to 3815 states and 11341 transitions. [2021-02-19 17:24:35,976 INFO L78 Accepts]: Start accepts. Automaton has 3815 states and 11341 transitions. Word has length 22 [2021-02-19 17:24:35,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:35,976 INFO L480 AbstractCegarLoop]: Abstraction has 3815 states and 11341 transitions. [2021-02-19 17:24:35,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:35,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3815 states and 11341 transitions. [2021-02-19 17:24:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:35,979 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:35,979 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:36,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3214 [2021-02-19 17:24:36,179 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:36,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:36,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1697833166, now seen corresponding path program 206 times [2021-02-19 17:24:36,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:36,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614374311] [2021-02-19 17:24:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:36,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614374311] [2021-02-19 17:24:36,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437421742] [2021-02-19 17:24:36,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:36,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:36,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:36,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:36,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:36,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:36,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-02-19 17:24:36,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139518877] [2021-02-19 17:24:36,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:36,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:36,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:36,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:36,309 INFO L87 Difference]: Start difference. First operand 3815 states and 11341 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:36,394 INFO L93 Difference]: Finished difference Result 4537 states and 12782 transitions. [2021-02-19 17:24:36,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:24:36,394 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:36,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:36,398 INFO L225 Difference]: With dead ends: 4537 [2021-02-19 17:24:36,398 INFO L226 Difference]: Without dead ends: 4537 [2021-02-19 17:24:36,398 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:24:36,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4537 states. [2021-02-19 17:24:36,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4537 to 3790. [2021-02-19 17:24:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 2.968857218263394) internal successors, (11249), 3789 states have internal predecessors, (11249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 11249 transitions. [2021-02-19 17:24:36,438 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 11249 transitions. Word has length 22 [2021-02-19 17:24:36,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:36,438 INFO L480 AbstractCegarLoop]: Abstraction has 3790 states and 11249 transitions. [2021-02-19 17:24:36,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:36,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 11249 transitions. [2021-02-19 17:24:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:36,441 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:36,441 INFO L506 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:36,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3215,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:36,642 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash 425768167, now seen corresponding path program 207 times [2021-02-19 17:24:36,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:36,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869085767] [2021-02-19 17:24:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:36,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869085767] [2021-02-19 17:24:36,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530362428] [2021-02-19 17:24:36,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:36,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:24:36,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:36,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 17:24:36,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 17:24:36,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:36,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-02-19 17:24:36,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112685670] [2021-02-19 17:24:36,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:24:36,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:36,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:24:36,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:36,850 INFO L87 Difference]: Start difference. First operand 3790 states and 11249 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:38,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:38,034 INFO L93 Difference]: Finished difference Result 8841 states and 25548 transitions. [2021-02-19 17:24:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-02-19 17:24:38,035 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:38,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:38,045 INFO L225 Difference]: With dead ends: 8841 [2021-02-19 17:24:38,045 INFO L226 Difference]: Without dead ends: 8828 [2021-02-19 17:24:38,046 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2654 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=965, Invalid=7225, Unknown=0, NotChecked=0, Total=8190 [2021-02-19 17:24:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8828 states. [2021-02-19 17:24:38,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8828 to 5267. [2021-02-19 17:24:38,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5267 states, 5266 states have (on average 2.932206608431447) internal successors, (15441), 5266 states have internal predecessors, (15441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:38,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5267 states to 5267 states and 15441 transitions. [2021-02-19 17:24:38,129 INFO L78 Accepts]: Start accepts. Automaton has 5267 states and 15441 transitions. Word has length 22 [2021-02-19 17:24:38,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:38,129 INFO L480 AbstractCegarLoop]: Abstraction has 5267 states and 15441 transitions. [2021-02-19 17:24:38,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:38,130 INFO L276 IsEmpty]: Start isEmpty. Operand 5267 states and 15441 transitions. [2021-02-19 17:24:38,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:38,134 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:38,134 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:38,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3216 [2021-02-19 17:24:38,335 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:38,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:38,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1370530150, now seen corresponding path program 208 times [2021-02-19 17:24:38,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:38,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549190526] [2021-02-19 17:24:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:38,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549190526] [2021-02-19 17:24:38,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704666240] [2021-02-19 17:24:38,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:38,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:38,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:38,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:38,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:38,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:38,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:38,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159360913] [2021-02-19 17:24:38,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:38,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:38,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:38,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:38,448 INFO L87 Difference]: Start difference. First operand 5267 states and 15441 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:38,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:38,599 INFO L93 Difference]: Finished difference Result 5681 states and 16052 transitions. [2021-02-19 17:24:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:24:38,599 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:38,605 INFO L225 Difference]: With dead ends: 5681 [2021-02-19 17:24:38,605 INFO L226 Difference]: Without dead ends: 5679 [2021-02-19 17:24:38,605 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:24:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5679 states. [2021-02-19 17:24:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5679 to 5282. [2021-02-19 17:24:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 2.932399166824465) internal successors, (15486), 5281 states have internal predecessors, (15486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 15486 transitions. [2021-02-19 17:24:38,669 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 15486 transitions. Word has length 22 [2021-02-19 17:24:38,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:38,670 INFO L480 AbstractCegarLoop]: Abstraction has 5282 states and 15486 transitions. [2021-02-19 17:24:38,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:38,670 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 15486 transitions. [2021-02-19 17:24:38,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:38,674 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:38,674 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:38,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3217 [2021-02-19 17:24:38,875 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:38,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:38,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1206688086, now seen corresponding path program 209 times [2021-02-19 17:24:38,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:38,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188590929] [2021-02-19 17:24:38,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:38,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188590929] [2021-02-19 17:24:38,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792057207] [2021-02-19 17:24:38,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:38,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:24:38,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:38,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:38,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:38,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:38,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:38,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185389044] [2021-02-19 17:24:38,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:38,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:38,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:38,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:38,994 INFO L87 Difference]: Start difference. First operand 5282 states and 15486 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:39,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:39,074 INFO L93 Difference]: Finished difference Result 5676 states and 16001 transitions. [2021-02-19 17:24:39,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:24:39,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:39,079 INFO L225 Difference]: With dead ends: 5676 [2021-02-19 17:24:39,079 INFO L226 Difference]: Without dead ends: 5676 [2021-02-19 17:24:39,079 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:39,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-02-19 17:24:39,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 5262. [2021-02-19 17:24:39,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5262 states, 5261 states have (on average 2.9283406196540582) internal successors, (15406), 5261 states have internal predecessors, (15406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:39,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5262 states to 5262 states and 15406 transitions. [2021-02-19 17:24:39,135 INFO L78 Accepts]: Start accepts. Automaton has 5262 states and 15406 transitions. Word has length 22 [2021-02-19 17:24:39,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:39,135 INFO L480 AbstractCegarLoop]: Abstraction has 5262 states and 15406 transitions. [2021-02-19 17:24:39,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:39,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5262 states and 15406 transitions. [2021-02-19 17:24:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:39,139 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:39,139 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:39,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3218,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:39,341 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:39,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1359231876, now seen corresponding path program 210 times [2021-02-19 17:24:39,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:39,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355636096] [2021-02-19 17:24:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:39,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355636096] [2021-02-19 17:24:39,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473297167] [2021-02-19 17:24:39,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:39,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:24:39,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:39,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:39,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:39,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:39,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:24:39,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753846893] [2021-02-19 17:24:39,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:39,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:39,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:39,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:39,474 INFO L87 Difference]: Start difference. First operand 5262 states and 15406 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:39,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:39,566 INFO L93 Difference]: Finished difference Result 6078 states and 16987 transitions. [2021-02-19 17:24:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:24:39,566 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:39,572 INFO L225 Difference]: With dead ends: 6078 [2021-02-19 17:24:39,572 INFO L226 Difference]: Without dead ends: 6078 [2021-02-19 17:24:39,572 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:24:39,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6078 states. [2021-02-19 17:24:39,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6078 to 5267. [2021-02-19 17:24:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5267 states, 5266 states have (on average 2.928218761868591) internal successors, (15420), 5266 states have internal predecessors, (15420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5267 states to 5267 states and 15420 transitions. [2021-02-19 17:24:39,632 INFO L78 Accepts]: Start accepts. Automaton has 5267 states and 15420 transitions. Word has length 22 [2021-02-19 17:24:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:39,632 INFO L480 AbstractCegarLoop]: Abstraction has 5267 states and 15420 transitions. [2021-02-19 17:24:39,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 5267 states and 15420 transitions. [2021-02-19 17:24:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:39,636 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:39,636 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:39,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3219 [2021-02-19 17:24:39,837 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:39,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:39,837 INFO L82 PathProgramCache]: Analyzing trace with hash -701627926, now seen corresponding path program 211 times [2021-02-19 17:24:39,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:39,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796870577] [2021-02-19 17:24:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:39,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796870577] [2021-02-19 17:24:39,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200274675] [2021-02-19 17:24:39,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:39,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:39,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:39,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:39,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:24:39,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905126739] [2021-02-19 17:24:39,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:39,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:39,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:39,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:39,961 INFO L87 Difference]: Start difference. First operand 5267 states and 15420 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:40,074 INFO L93 Difference]: Finished difference Result 7798 states and 22209 transitions. [2021-02-19 17:24:40,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:24:40,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:40,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:40,083 INFO L225 Difference]: With dead ends: 7798 [2021-02-19 17:24:40,083 INFO L226 Difference]: Without dead ends: 7798 [2021-02-19 17:24:40,083 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:24:40,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7798 states. [2021-02-19 17:24:40,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7798 to 6706. [2021-02-19 17:24:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6706 states, 6705 states have (on average 2.9707680835197614) internal successors, (19919), 6705 states have internal predecessors, (19919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6706 states to 6706 states and 19919 transitions. [2021-02-19 17:24:40,162 INFO L78 Accepts]: Start accepts. Automaton has 6706 states and 19919 transitions. Word has length 22 [2021-02-19 17:24:40,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:40,162 INFO L480 AbstractCegarLoop]: Abstraction has 6706 states and 19919 transitions. [2021-02-19 17:24:40,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:40,163 INFO L276 IsEmpty]: Start isEmpty. Operand 6706 states and 19919 transitions. [2021-02-19 17:24:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:40,169 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:40,169 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:40,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3220,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:40,369 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:40,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:40,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1969003122, now seen corresponding path program 212 times [2021-02-19 17:24:40,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:40,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131257080] [2021-02-19 17:24:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:40,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131257080] [2021-02-19 17:24:40,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325583748] [2021-02-19 17:24:40,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:40,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:40,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:40,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:40,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:40,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:40,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:24:40,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372678352] [2021-02-19 17:24:40,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:24:40,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:40,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:24:40,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:24:40,475 INFO L87 Difference]: Start difference. First operand 6706 states and 19919 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:40,622 INFO L93 Difference]: Finished difference Result 7125 states and 20623 transitions. [2021-02-19 17:24:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:24:40,622 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:40,629 INFO L225 Difference]: With dead ends: 7125 [2021-02-19 17:24:40,629 INFO L226 Difference]: Without dead ends: 7121 [2021-02-19 17:24:40,629 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:24:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7121 states. [2021-02-19 17:24:40,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7121 to 6770. [2021-02-19 17:24:40,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6770 states, 6769 states have (on average 2.975033239769538) internal successors, (20138), 6769 states have internal predecessors, (20138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:40,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6770 states to 6770 states and 20138 transitions. [2021-02-19 17:24:40,708 INFO L78 Accepts]: Start accepts. Automaton has 6770 states and 20138 transitions. Word has length 22 [2021-02-19 17:24:40,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:40,708 INFO L480 AbstractCegarLoop]: Abstraction has 6770 states and 20138 transitions. [2021-02-19 17:24:40,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand 6770 states and 20138 transitions. [2021-02-19 17:24:40,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:40,714 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:40,714 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:40,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3221 [2021-02-19 17:24:40,914 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:40,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:40,915 INFO L82 PathProgramCache]: Analyzing trace with hash 84454130, now seen corresponding path program 213 times [2021-02-19 17:24:40,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:40,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206553808] [2021-02-19 17:24:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:40,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206553808] [2021-02-19 17:24:40,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179320366] [2021-02-19 17:24:40,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:40,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:24:40,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:40,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:40,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:41,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:41,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:24:41,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790958277] [2021-02-19 17:24:41,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:41,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:41,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:41,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:41,042 INFO L87 Difference]: Start difference. First operand 6770 states and 20138 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:41,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:41,158 INFO L93 Difference]: Finished difference Result 8214 states and 23476 transitions. [2021-02-19 17:24:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:24:41,158 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:41,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:41,166 INFO L225 Difference]: With dead ends: 8214 [2021-02-19 17:24:41,167 INFO L226 Difference]: Without dead ends: 8214 [2021-02-19 17:24:41,167 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:24:41,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8214 states. [2021-02-19 17:24:41,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8214 to 5345. [2021-02-19 17:24:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5345 states, 5344 states have (on average 2.94311377245509) internal successors, (15728), 5344 states have internal predecessors, (15728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5345 states to 5345 states and 15728 transitions. [2021-02-19 17:24:41,242 INFO L78 Accepts]: Start accepts. Automaton has 5345 states and 15728 transitions. Word has length 22 [2021-02-19 17:24:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:41,242 INFO L480 AbstractCegarLoop]: Abstraction has 5345 states and 15728 transitions. [2021-02-19 17:24:41,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 5345 states and 15728 transitions. [2021-02-19 17:24:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:41,246 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:41,246 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:41,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3222,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:41,447 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:41,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:41,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1650265940, now seen corresponding path program 214 times [2021-02-19 17:24:41,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:41,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152605822] [2021-02-19 17:24:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:41,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152605822] [2021-02-19 17:24:41,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110000995] [2021-02-19 17:24:41,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:41,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:41,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:41,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:41,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:41,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:41,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414496881] [2021-02-19 17:24:41,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:41,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:41,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:41,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:41,589 INFO L87 Difference]: Start difference. First operand 5345 states and 15728 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:41,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:41,733 INFO L93 Difference]: Finished difference Result 5734 states and 16282 transitions. [2021-02-19 17:24:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:24:41,733 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:41,739 INFO L225 Difference]: With dead ends: 5734 [2021-02-19 17:24:41,739 INFO L226 Difference]: Without dead ends: 5730 [2021-02-19 17:24:41,739 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:24:41,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2021-02-19 17:24:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 5326. [2021-02-19 17:24:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5326 states, 5325 states have (on average 2.939718309859155) internal successors, (15654), 5325 states have internal predecessors, (15654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5326 states to 5326 states and 15654 transitions. [2021-02-19 17:24:41,797 INFO L78 Accepts]: Start accepts. Automaton has 5326 states and 15654 transitions. Word has length 22 [2021-02-19 17:24:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:41,798 INFO L480 AbstractCegarLoop]: Abstraction has 5326 states and 15654 transitions. [2021-02-19 17:24:41,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:41,798 INFO L276 IsEmpty]: Start isEmpty. Operand 5326 states and 15654 transitions. [2021-02-19 17:24:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:41,802 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:41,802 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:42,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3223,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:42,002 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:42,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:42,002 INFO L82 PathProgramCache]: Analyzing trace with hash -926952296, now seen corresponding path program 215 times [2021-02-19 17:24:42,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:42,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144626156] [2021-02-19 17:24:42,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:42,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144626156] [2021-02-19 17:24:42,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919752495] [2021-02-19 17:24:42,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:42,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:24:42,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:42,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:42,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:42,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:42,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:42,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394373853] [2021-02-19 17:24:42,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:42,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:42,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:42,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:42,120 INFO L87 Difference]: Start difference. First operand 5326 states and 15654 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:42,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:42,209 INFO L93 Difference]: Finished difference Result 5939 states and 16743 transitions. [2021-02-19 17:24:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:24:42,210 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:42,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:42,216 INFO L225 Difference]: With dead ends: 5939 [2021-02-19 17:24:42,216 INFO L226 Difference]: Without dead ends: 5939 [2021-02-19 17:24:42,216 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:42,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5939 states. [2021-02-19 17:24:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5939 to 5327. [2021-02-19 17:24:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5327 states, 5326 states have (on average 2.937476530229065) internal successors, (15645), 5326 states have internal predecessors, (15645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5327 states to 5327 states and 15645 transitions. [2021-02-19 17:24:42,277 INFO L78 Accepts]: Start accepts. Automaton has 5327 states and 15645 transitions. Word has length 22 [2021-02-19 17:24:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:42,277 INFO L480 AbstractCegarLoop]: Abstraction has 5327 states and 15645 transitions. [2021-02-19 17:24:42,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 5327 states and 15645 transitions. [2021-02-19 17:24:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:42,281 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:42,281 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:42,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3224,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:42,482 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:42,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:42,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1638967666, now seen corresponding path program 216 times [2021-02-19 17:24:42,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:42,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578511516] [2021-02-19 17:24:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:42,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578511516] [2021-02-19 17:24:42,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974791907] [2021-02-19 17:24:42,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:24:42,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:24:42,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:42,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:42,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:42,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:42,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-02-19 17:24:42,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724048890] [2021-02-19 17:24:42,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:42,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:42,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:42,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:42,643 INFO L87 Difference]: Start difference. First operand 5327 states and 15645 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:42,729 INFO L93 Difference]: Finished difference Result 5694 states and 16109 transitions. [2021-02-19 17:24:42,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:24:42,730 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:42,737 INFO L225 Difference]: With dead ends: 5694 [2021-02-19 17:24:42,737 INFO L226 Difference]: Without dead ends: 5694 [2021-02-19 17:24:42,737 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5694 states. [2021-02-19 17:24:42,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5694 to 5279. [2021-02-19 17:24:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5279 states, 5278 states have (on average 2.932550208412277) internal successors, (15478), 5278 states have internal predecessors, (15478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5279 states to 5279 states and 15478 transitions. [2021-02-19 17:24:42,819 INFO L78 Accepts]: Start accepts. Automaton has 5279 states and 15478 transitions. Word has length 22 [2021-02-19 17:24:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:42,819 INFO L480 AbstractCegarLoop]: Abstraction has 5279 states and 15478 transitions. [2021-02-19 17:24:42,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5279 states and 15478 transitions. [2021-02-19 17:24:42,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:42,825 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:42,825 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:43,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3225,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:43,044 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:43,044 INFO L82 PathProgramCache]: Analyzing trace with hash -421892136, now seen corresponding path program 217 times [2021-02-19 17:24:43,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:43,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119541535] [2021-02-19 17:24:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:43,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119541535] [2021-02-19 17:24:43,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758393373] [2021-02-19 17:24:43,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:43,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:43,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:43,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:43,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-02-19 17:24:43,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661249915] [2021-02-19 17:24:43,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:43,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:43,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:43,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:43,198 INFO L87 Difference]: Start difference. First operand 5279 states and 15478 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:43,313 INFO L93 Difference]: Finished difference Result 6201 states and 17402 transitions. [2021-02-19 17:24:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:24:43,314 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:43,320 INFO L225 Difference]: With dead ends: 6201 [2021-02-19 17:24:43,320 INFO L226 Difference]: Without dead ends: 6201 [2021-02-19 17:24:43,320 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:24:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6201 states. [2021-02-19 17:24:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6201 to 5194. [2021-02-19 17:24:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5194 states, 5193 states have (on average 2.9212401309455034) internal successors, (15170), 5193 states have internal predecessors, (15170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5194 states to 5194 states and 15170 transitions. [2021-02-19 17:24:43,388 INFO L78 Accepts]: Start accepts. Automaton has 5194 states and 15170 transitions. Word has length 22 [2021-02-19 17:24:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:43,388 INFO L480 AbstractCegarLoop]: Abstraction has 5194 states and 15170 transitions. [2021-02-19 17:24:43,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 5194 states and 15170 transitions. [2021-02-19 17:24:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:43,392 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:43,392 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:43,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3226 [2021-02-19 17:24:43,593 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:43,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash 115963442, now seen corresponding path program 218 times [2021-02-19 17:24:43,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:43,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544321627] [2021-02-19 17:24:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:43,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544321627] [2021-02-19 17:24:43,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445547204] [2021-02-19 17:24:43,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:43,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:43,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:43,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:43,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:43,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:43,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-02-19 17:24:43,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340258505] [2021-02-19 17:24:43,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:43,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:43,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:43,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:43,728 INFO L87 Difference]: Start difference. First operand 5194 states and 15170 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:43,894 INFO L93 Difference]: Finished difference Result 8185 states and 23144 transitions. [2021-02-19 17:24:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:24:43,895 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:43,904 INFO L225 Difference]: With dead ends: 8185 [2021-02-19 17:24:43,904 INFO L226 Difference]: Without dead ends: 8185 [2021-02-19 17:24:43,904 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:24:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8185 states. [2021-02-19 17:24:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8185 to 6492. [2021-02-19 17:24:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6492 states, 6491 states have (on average 2.9625635495301186) internal successors, (19230), 6491 states have internal predecessors, (19230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:43,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6492 states to 6492 states and 19230 transitions. [2021-02-19 17:24:43,998 INFO L78 Accepts]: Start accepts. Automaton has 6492 states and 19230 transitions. Word has length 22 [2021-02-19 17:24:43,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:43,998 INFO L480 AbstractCegarLoop]: Abstraction has 6492 states and 19230 transitions. [2021-02-19 17:24:43,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 6492 states and 19230 transitions. [2021-02-19 17:24:44,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:44,004 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:44,004 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:44,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3227,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:44,205 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:44,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:44,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1285296598, now seen corresponding path program 219 times [2021-02-19 17:24:44,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:44,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315360979] [2021-02-19 17:24:44,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:44,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315360979] [2021-02-19 17:24:44,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020380312] [2021-02-19 17:24:44,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:44,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:24:44,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:44,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:44,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:44,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:44,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:24:44,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353946563] [2021-02-19 17:24:44,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:44,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:44,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:44,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:44,369 INFO L87 Difference]: Start difference. First operand 6492 states and 19230 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:44,519 INFO L93 Difference]: Finished difference Result 8061 states and 22941 transitions. [2021-02-19 17:24:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:24:44,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:44,527 INFO L225 Difference]: With dead ends: 8061 [2021-02-19 17:24:44,527 INFO L226 Difference]: Without dead ends: 8061 [2021-02-19 17:24:44,528 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:24:44,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2021-02-19 17:24:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 5117. [2021-02-19 17:24:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5117 states, 5116 states have (on average 2.928655199374511) internal successors, (14983), 5116 states have internal predecessors, (14983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5117 states to 5117 states and 14983 transitions. [2021-02-19 17:24:44,597 INFO L78 Accepts]: Start accepts. Automaton has 5117 states and 14983 transitions. Word has length 22 [2021-02-19 17:24:44,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:44,597 INFO L480 AbstractCegarLoop]: Abstraction has 5117 states and 14983 transitions. [2021-02-19 17:24:44,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand 5117 states and 14983 transitions. [2021-02-19 17:24:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:44,601 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:44,601 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:44,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3228,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:44,802 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:44,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:44,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1732140838, now seen corresponding path program 220 times [2021-02-19 17:24:44,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:44,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001837517] [2021-02-19 17:24:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:44,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001837517] [2021-02-19 17:24:44,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173735706] [2021-02-19 17:24:44,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:44,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:44,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:44,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:44,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:44,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:44,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:44,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312965005] [2021-02-19 17:24:44,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:44,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:44,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:44,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:44,913 INFO L87 Difference]: Start difference. First operand 5117 states and 14983 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:45,057 INFO L93 Difference]: Finished difference Result 5477 states and 15491 transitions. [2021-02-19 17:24:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:24:45,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:45,063 INFO L225 Difference]: With dead ends: 5477 [2021-02-19 17:24:45,063 INFO L226 Difference]: Without dead ends: 5473 [2021-02-19 17:24:45,063 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:24:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2021-02-19 17:24:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 5129. [2021-02-19 17:24:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5129 states, 5128 states have (on average 2.927457098283931) internal successors, (15012), 5128 states have internal predecessors, (15012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:45,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5129 states to 5129 states and 15012 transitions. [2021-02-19 17:24:45,121 INFO L78 Accepts]: Start accepts. Automaton has 5129 states and 15012 transitions. Word has length 22 [2021-02-19 17:24:45,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:45,121 INFO L480 AbstractCegarLoop]: Abstraction has 5129 states and 15012 transitions. [2021-02-19 17:24:45,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:45,121 INFO L276 IsEmpty]: Start isEmpty. Operand 5129 states and 15012 transitions. [2021-02-19 17:24:45,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:45,125 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:45,125 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:45,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3229 [2021-02-19 17:24:45,326 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:45,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:45,326 INFO L82 PathProgramCache]: Analyzing trace with hash -845077398, now seen corresponding path program 221 times [2021-02-19 17:24:45,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:45,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683631866] [2021-02-19 17:24:45,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:45,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683631866] [2021-02-19 17:24:45,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374506604] [2021-02-19 17:24:45,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:45,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:24:45,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:45,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:45,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:45,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:45,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:45,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078975206] [2021-02-19 17:24:45,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:45,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:45,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:45,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:45,442 INFO L87 Difference]: Start difference. First operand 5129 states and 15012 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:45,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:45,521 INFO L93 Difference]: Finished difference Result 5852 states and 16406 transitions. [2021-02-19 17:24:45,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:24:45,521 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:45,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:45,526 INFO L225 Difference]: With dead ends: 5852 [2021-02-19 17:24:45,527 INFO L226 Difference]: Without dead ends: 5852 [2021-02-19 17:24:45,527 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2021-02-19 17:24:45,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 5141. [2021-02-19 17:24:45,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5141 states, 5140 states have (on average 2.92568093385214) internal successors, (15038), 5140 states have internal predecessors, (15038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:45,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5141 states to 5141 states and 15038 transitions. [2021-02-19 17:24:45,585 INFO L78 Accepts]: Start accepts. Automaton has 5141 states and 15038 transitions. Word has length 22 [2021-02-19 17:24:45,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:45,585 INFO L480 AbstractCegarLoop]: Abstraction has 5141 states and 15038 transitions. [2021-02-19 17:24:45,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:45,585 INFO L276 IsEmpty]: Start isEmpty. Operand 5141 states and 15038 transitions. [2021-02-19 17:24:45,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:45,589 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:45,589 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:45,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3230,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:45,790 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:45,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:45,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1720842564, now seen corresponding path program 222 times [2021-02-19 17:24:45,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:45,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818527650] [2021-02-19 17:24:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:45,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818527650] [2021-02-19 17:24:45,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493913359] [2021-02-19 17:24:45,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:45,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:24:45,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:45,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:45,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:45,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:45,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:24:45,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201203072] [2021-02-19 17:24:45,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:45,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:45,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:45,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:45,911 INFO L87 Difference]: Start difference. First operand 5141 states and 15038 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:46,001 INFO L93 Difference]: Finished difference Result 5882 states and 16500 transitions. [2021-02-19 17:24:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:24:46,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:46,006 INFO L225 Difference]: With dead ends: 5882 [2021-02-19 17:24:46,006 INFO L226 Difference]: Without dead ends: 5882 [2021-02-19 17:24:46,007 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:24:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5882 states. [2021-02-19 17:24:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5882 to 5136. [2021-02-19 17:24:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5136 states, 5135 states have (on average 2.924245374878286) internal successors, (15016), 5135 states have internal predecessors, (15016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:46,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5136 states to 5136 states and 15016 transitions. [2021-02-19 17:24:46,065 INFO L78 Accepts]: Start accepts. Automaton has 5136 states and 15016 transitions. Word has length 22 [2021-02-19 17:24:46,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:46,065 INFO L480 AbstractCegarLoop]: Abstraction has 5136 states and 15016 transitions. [2021-02-19 17:24:46,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 5136 states and 15016 transitions. [2021-02-19 17:24:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:46,069 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:46,069 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:46,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3231 [2021-02-19 17:24:46,274 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:46,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:46,274 INFO L82 PathProgramCache]: Analyzing trace with hash -340017238, now seen corresponding path program 223 times [2021-02-19 17:24:46,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:46,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987913991] [2021-02-19 17:24:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:46,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:46,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987913991] [2021-02-19 17:24:46,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310132295] [2021-02-19 17:24:46,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:46,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:46,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:46,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:24:46,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659317347] [2021-02-19 17:24:46,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:46,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:46,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:46,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:46,394 INFO L87 Difference]: Start difference. First operand 5136 states and 15016 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:46,477 INFO L93 Difference]: Finished difference Result 8617 states and 24967 transitions. [2021-02-19 17:24:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:24:46,478 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:46,486 INFO L225 Difference]: With dead ends: 8617 [2021-02-19 17:24:46,486 INFO L226 Difference]: Without dead ends: 8617 [2021-02-19 17:24:46,486 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:24:46,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8617 states. [2021-02-19 17:24:46,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8617 to 8117. [2021-02-19 17:24:46,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 8116 states have (on average 2.985584031542632) internal successors, (24231), 8116 states have internal predecessors, (24231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:46,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 24231 transitions. [2021-02-19 17:24:46,583 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 24231 transitions. Word has length 22 [2021-02-19 17:24:46,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:46,584 INFO L480 AbstractCegarLoop]: Abstraction has 8117 states and 24231 transitions. [2021-02-19 17:24:46,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:46,584 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 24231 transitions. [2021-02-19 17:24:46,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:46,590 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:46,590 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:46,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3232 [2021-02-19 17:24:46,790 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:46,791 INFO L82 PathProgramCache]: Analyzing trace with hash 197838340, now seen corresponding path program 224 times [2021-02-19 17:24:46,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:46,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109591554] [2021-02-19 17:24:46,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:46,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109591554] [2021-02-19 17:24:46,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080815018] [2021-02-19 17:24:46,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:46,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:46,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:46,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:46,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:46,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:46,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:24:46,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47840439] [2021-02-19 17:24:46,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:46,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:46,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:46,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:46,960 INFO L87 Difference]: Start difference. First operand 8117 states and 24231 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:47,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:47,098 INFO L93 Difference]: Finished difference Result 9016 states and 26002 transitions. [2021-02-19 17:24:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:24:47,098 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:47,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:47,107 INFO L225 Difference]: With dead ends: 9016 [2021-02-19 17:24:47,108 INFO L226 Difference]: Without dead ends: 9016 [2021-02-19 17:24:47,108 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:24:47,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9016 states. [2021-02-19 17:24:47,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9016 to 7991. [2021-02-19 17:24:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7991 states, 7990 states have (on average 2.9822277847309135) internal successors, (23828), 7990 states have internal predecessors, (23828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7991 states to 7991 states and 23828 transitions. [2021-02-19 17:24:47,232 INFO L78 Accepts]: Start accepts. Automaton has 7991 states and 23828 transitions. Word has length 22 [2021-02-19 17:24:47,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:47,232 INFO L480 AbstractCegarLoop]: Abstraction has 7991 states and 23828 transitions. [2021-02-19 17:24:47,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:47,232 INFO L276 IsEmpty]: Start isEmpty. Operand 7991 states and 23828 transitions. [2021-02-19 17:24:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:47,238 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:47,238 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:47,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:47,439 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:47,439 INFO L82 PathProgramCache]: Analyzing trace with hash -308507926, now seen corresponding path program 225 times [2021-02-19 17:24:47,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:47,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117174429] [2021-02-19 17:24:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:47,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117174429] [2021-02-19 17:24:47,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124157550] [2021-02-19 17:24:47,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:47,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:24:47,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:47,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:47,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:47,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:47,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:24:47,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725043858] [2021-02-19 17:24:47,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:47,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:47,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:47,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:47,587 INFO L87 Difference]: Start difference. First operand 7991 states and 23828 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:47,813 INFO L93 Difference]: Finished difference Result 12677 states and 37313 transitions. [2021-02-19 17:24:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:24:47,814 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:47,828 INFO L225 Difference]: With dead ends: 12677 [2021-02-19 17:24:47,828 INFO L226 Difference]: Without dead ends: 12677 [2021-02-19 17:24:47,828 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:24:47,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12677 states. [2021-02-19 17:24:47,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12677 to 11219. [2021-02-19 17:24:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11219 states, 11218 states have (on average 3.0287038687823142) internal successors, (33976), 11218 states have internal predecessors, (33976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11219 states to 11219 states and 33976 transitions. [2021-02-19 17:24:47,981 INFO L78 Accepts]: Start accepts. Automaton has 11219 states and 33976 transitions. Word has length 22 [2021-02-19 17:24:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:47,982 INFO L480 AbstractCegarLoop]: Abstraction has 11219 states and 33976 transitions. [2021-02-19 17:24:47,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 11219 states and 33976 transitions. [2021-02-19 17:24:47,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:47,990 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:47,990 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:48,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3234,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:48,191 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash -192938664, now seen corresponding path program 226 times [2021-02-19 17:24:48,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:48,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435036137] [2021-02-19 17:24:48,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:48,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435036137] [2021-02-19 17:24:48,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901610022] [2021-02-19 17:24:48,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:48,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:48,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:48,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:48,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:48,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:48,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:24:48,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439820006] [2021-02-19 17:24:48,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:48,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:48,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:48,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:48,312 INFO L87 Difference]: Start difference. First operand 11219 states and 33976 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:48,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:48,405 INFO L93 Difference]: Finished difference Result 11735 states and 34955 transitions. [2021-02-19 17:24:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:24:48,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:48,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:48,420 INFO L225 Difference]: With dead ends: 11735 [2021-02-19 17:24:48,420 INFO L226 Difference]: Without dead ends: 11735 [2021-02-19 17:24:48,420 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:24:48,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11735 states. [2021-02-19 17:24:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11735 to 11205. [2021-02-19 17:24:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11205 states, 11204 states have (on average 3.0282934666190644) internal successors, (33929), 11204 states have internal predecessors, (33929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:48,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11205 states to 11205 states and 33929 transitions. [2021-02-19 17:24:48,573 INFO L78 Accepts]: Start accepts. Automaton has 11205 states and 33929 transitions. Word has length 22 [2021-02-19 17:24:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:48,573 INFO L480 AbstractCegarLoop]: Abstraction has 11205 states and 33929 transitions. [2021-02-19 17:24:48,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:48,573 INFO L276 IsEmpty]: Start isEmpty. Operand 11205 states and 33929 transitions. [2021-02-19 17:24:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:48,582 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:48,582 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:48,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3235,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:48,783 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:48,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:48,783 INFO L82 PathProgramCache]: Analyzing trace with hash 344916914, now seen corresponding path program 227 times [2021-02-19 17:24:48,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:48,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951315345] [2021-02-19 17:24:48,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:48,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951315345] [2021-02-19 17:24:48,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123599620] [2021-02-19 17:24:48,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:48,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:24:48,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:48,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:48,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:48,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:48,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:24:48,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807223093] [2021-02-19 17:24:48,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:48,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:48,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:48,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:48,914 INFO L87 Difference]: Start difference. First operand 11205 states and 33929 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:49,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:49,055 INFO L93 Difference]: Finished difference Result 12776 states and 37893 transitions. [2021-02-19 17:24:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:24:49,055 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:49,070 INFO L225 Difference]: With dead ends: 12776 [2021-02-19 17:24:49,070 INFO L226 Difference]: Without dead ends: 12776 [2021-02-19 17:24:49,070 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:24:49,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12776 states. [2021-02-19 17:24:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12776 to 7151. [2021-02-19 17:24:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7151 states, 7150 states have (on average 2.961818181818182) internal successors, (21177), 7150 states have internal predecessors, (21177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7151 states to 7151 states and 21177 transitions. [2021-02-19 17:24:49,204 INFO L78 Accepts]: Start accepts. Automaton has 7151 states and 21177 transitions. Word has length 22 [2021-02-19 17:24:49,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:49,204 INFO L480 AbstractCegarLoop]: Abstraction has 7151 states and 21177 transitions. [2021-02-19 17:24:49,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:49,204 INFO L276 IsEmpty]: Start isEmpty. Operand 7151 states and 21177 transitions. [2021-02-19 17:24:49,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:49,210 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:49,210 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:49,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3236,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:49,411 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:49,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:49,411 INFO L82 PathProgramCache]: Analyzing trace with hash -161429352, now seen corresponding path program 228 times [2021-02-19 17:24:49,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:49,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11700053] [2021-02-19 17:24:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:49,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11700053] [2021-02-19 17:24:49,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566485577] [2021-02-19 17:24:49,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:49,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:24:49,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:49,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:49,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:49,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:49,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:24:49,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115076274] [2021-02-19 17:24:49,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:49,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:49,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:49,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:49,592 INFO L87 Difference]: Start difference. First operand 7151 states and 21177 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:49,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:49,782 INFO L93 Difference]: Finished difference Result 10511 states and 30241 transitions. [2021-02-19 17:24:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:24:49,783 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:49,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:49,795 INFO L225 Difference]: With dead ends: 10511 [2021-02-19 17:24:49,795 INFO L226 Difference]: Without dead ends: 10511 [2021-02-19 17:24:49,795 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:24:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10511 states. [2021-02-19 17:24:49,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10511 to 6060. [2021-02-19 17:24:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 2.9485063541838588) internal successors, (17865), 6059 states have internal predecessors, (17865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 17865 transitions. [2021-02-19 17:24:49,898 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 17865 transitions. Word has length 22 [2021-02-19 17:24:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:49,898 INFO L480 AbstractCegarLoop]: Abstraction has 6060 states and 17865 transitions. [2021-02-19 17:24:49,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:49,899 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 17865 transitions. [2021-02-19 17:24:49,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:49,904 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:49,904 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:50,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3237,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:50,104 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:50,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:50,105 INFO L82 PathProgramCache]: Analyzing trace with hash 78354802, now seen corresponding path program 229 times [2021-02-19 17:24:50,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:50,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917176650] [2021-02-19 17:24:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:24:50,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917176650] [2021-02-19 17:24:50,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335414188] [2021-02-19 17:24:50,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:50,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:50,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:24:50,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:50,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 17:24:50,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511842921] [2021-02-19 17:24:50,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:24:50,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:50,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:24:50,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:24:50,217 INFO L87 Difference]: Start difference. First operand 6060 states and 17865 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:50,368 INFO L93 Difference]: Finished difference Result 6327 states and 18192 transitions. [2021-02-19 17:24:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:24:50,368 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:50,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:50,375 INFO L225 Difference]: With dead ends: 6327 [2021-02-19 17:24:50,375 INFO L226 Difference]: Without dead ends: 6323 [2021-02-19 17:24:50,375 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:24:50,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2021-02-19 17:24:50,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6060. [2021-02-19 17:24:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6060 states, 6059 states have (on average 2.947846179237498) internal successors, (17861), 6059 states have internal predecessors, (17861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6060 states to 6060 states and 17861 transitions. [2021-02-19 17:24:50,446 INFO L78 Accepts]: Start accepts. Automaton has 6060 states and 17861 transitions. Word has length 22 [2021-02-19 17:24:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:50,446 INFO L480 AbstractCegarLoop]: Abstraction has 6060 states and 17861 transitions. [2021-02-19 17:24:50,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:50,446 INFO L276 IsEmpty]: Start isEmpty. Operand 6060 states and 17861 transitions. [2021-02-19 17:24:50,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:50,451 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:50,451 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:50,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3238 [2021-02-19 17:24:50,651 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:50,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:50,652 INFO L82 PathProgramCache]: Analyzing trace with hash -797896206, now seen corresponding path program 230 times [2021-02-19 17:24:50,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:50,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885060230] [2021-02-19 17:24:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:50,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885060230] [2021-02-19 17:24:50,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961926000] [2021-02-19 17:24:50,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:50,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:50,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:50,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:50,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:50,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:50,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:24:50,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005858013] [2021-02-19 17:24:50,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:50,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:50,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:50,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:50,792 INFO L87 Difference]: Start difference. First operand 6060 states and 17861 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:50,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:50,967 INFO L93 Difference]: Finished difference Result 7520 states and 21313 transitions. [2021-02-19 17:24:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:24:50,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:50,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:50,975 INFO L225 Difference]: With dead ends: 7520 [2021-02-19 17:24:50,975 INFO L226 Difference]: Without dead ends: 7520 [2021-02-19 17:24:50,975 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:24:50,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7520 states. [2021-02-19 17:24:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7520 to 4900. [2021-02-19 17:24:51,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4900 states, 4899 states have (on average 2.9287609716268626) internal successors, (14348), 4899 states have internal predecessors, (14348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:51,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4900 states to 4900 states and 14348 transitions. [2021-02-19 17:24:51,037 INFO L78 Accepts]: Start accepts. Automaton has 4900 states and 14348 transitions. Word has length 22 [2021-02-19 17:24:51,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:51,037 INFO L480 AbstractCegarLoop]: Abstraction has 4900 states and 14348 transitions. [2021-02-19 17:24:51,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:51,037 INFO L276 IsEmpty]: Start isEmpty. Operand 4900 states and 14348 transitions. [2021-02-19 17:24:51,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:51,041 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:51,041 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:51,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3239,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:51,241 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:51,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:51,242 INFO L82 PathProgramCache]: Analyzing trace with hash -24704620, now seen corresponding path program 231 times [2021-02-19 17:24:51,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:51,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198232524] [2021-02-19 17:24:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:51,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198232524] [2021-02-19 17:24:51,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748381483] [2021-02-19 17:24:51,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:51,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:24:51,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:51,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:51,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:51,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:51,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:51,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966500408] [2021-02-19 17:24:51,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:51,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:51,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:51,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:51,359 INFO L87 Difference]: Start difference. First operand 4900 states and 14348 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:51,505 INFO L93 Difference]: Finished difference Result 5227 states and 14796 transitions. [2021-02-19 17:24:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:24:51,506 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:51,511 INFO L225 Difference]: With dead ends: 5227 [2021-02-19 17:24:51,511 INFO L226 Difference]: Without dead ends: 5223 [2021-02-19 17:24:51,511 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:24:51,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-02-19 17:24:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 4912. [2021-02-19 17:24:51,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4912 states, 4911 states have (on average 2.9275096721645286) internal successors, (14377), 4911 states have internal predecessors, (14377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4912 states to 4912 states and 14377 transitions. [2021-02-19 17:24:51,567 INFO L78 Accepts]: Start accepts. Automaton has 4912 states and 14377 transitions. Word has length 22 [2021-02-19 17:24:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:51,568 INFO L480 AbstractCegarLoop]: Abstraction has 4912 states and 14377 transitions. [2021-02-19 17:24:51,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4912 states and 14377 transitions. [2021-02-19 17:24:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:51,571 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:51,571 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:51,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3240 [2021-02-19 17:24:51,772 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:51,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1693044440, now seen corresponding path program 232 times [2021-02-19 17:24:51,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:51,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898569884] [2021-02-19 17:24:51,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:51,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898569884] [2021-02-19 17:24:51,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008727723] [2021-02-19 17:24:51,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:51,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:51,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:51,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:51,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:51,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:51,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:51,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506982888] [2021-02-19 17:24:51,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:51,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:51,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:51,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:51,886 INFO L87 Difference]: Start difference. First operand 4912 states and 14377 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:51,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:51,971 INFO L93 Difference]: Finished difference Result 5643 states and 15813 transitions. [2021-02-19 17:24:51,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:24:51,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:51,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:51,977 INFO L225 Difference]: With dead ends: 5643 [2021-02-19 17:24:51,977 INFO L226 Difference]: Without dead ends: 5643 [2021-02-19 17:24:51,977 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:24:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2021-02-19 17:24:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 4920. [2021-02-19 17:24:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4920 states, 4919 states have (on average 2.926611099817036) internal successors, (14396), 4919 states have internal predecessors, (14396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4920 states to 4920 states and 14396 transitions. [2021-02-19 17:24:52,035 INFO L78 Accepts]: Start accepts. Automaton has 4920 states and 14396 transitions. Word has length 22 [2021-02-19 17:24:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:52,035 INFO L480 AbstractCegarLoop]: Abstraction has 4920 states and 14396 transitions. [2021-02-19 17:24:52,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 4920 states and 14396 transitions. [2021-02-19 17:24:52,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:52,039 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:52,039 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:52,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3241 [2021-02-19 17:24:52,239 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:52,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:52,239 INFO L82 PathProgramCache]: Analyzing trace with hash -36002894, now seen corresponding path program 233 times [2021-02-19 17:24:52,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:52,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491156373] [2021-02-19 17:24:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:52,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491156373] [2021-02-19 17:24:52,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173860827] [2021-02-19 17:24:52,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:52,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:24:52,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:52,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:52,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:52,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:52,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-02-19 17:24:52,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950581390] [2021-02-19 17:24:52,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:52,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:52,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:52,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:52,365 INFO L87 Difference]: Start difference. First operand 4920 states and 14396 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:52,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:52,473 INFO L93 Difference]: Finished difference Result 5831 states and 16328 transitions. [2021-02-19 17:24:52,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:24:52,473 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:52,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:52,480 INFO L225 Difference]: With dead ends: 5831 [2021-02-19 17:24:52,480 INFO L226 Difference]: Without dead ends: 5831 [2021-02-19 17:24:52,480 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:24:52,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2021-02-19 17:24:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 4924. [2021-02-19 17:24:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4924 states, 4923 states have (on average 2.926264472882389) internal successors, (14406), 4923 states have internal predecessors, (14406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4924 states to 4924 states and 14406 transitions. [2021-02-19 17:24:52,565 INFO L78 Accepts]: Start accepts. Automaton has 4924 states and 14406 transitions. Word has length 22 [2021-02-19 17:24:52,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:52,565 INFO L480 AbstractCegarLoop]: Abstraction has 4924 states and 14406 transitions. [2021-02-19 17:24:52,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4924 states and 14406 transitions. [2021-02-19 17:24:52,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:52,570 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:52,570 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:52,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3242 [2021-02-19 17:24:52,771 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:52,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2096862696, now seen corresponding path program 234 times [2021-02-19 17:24:52,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:52,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928027754] [2021-02-19 17:24:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:52,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928027754] [2021-02-19 17:24:52,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787646309] [2021-02-19 17:24:52,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:52,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:24:52,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:52,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:52,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:52,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:52,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-02-19 17:24:52,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550549478] [2021-02-19 17:24:52,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:52,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:52,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:52,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:52,902 INFO L87 Difference]: Start difference. First operand 4924 states and 14406 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:53,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:53,017 INFO L93 Difference]: Finished difference Result 5718 states and 16065 transitions. [2021-02-19 17:24:53,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:24:53,017 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:53,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:53,022 INFO L225 Difference]: With dead ends: 5718 [2021-02-19 17:24:53,022 INFO L226 Difference]: Without dead ends: 5718 [2021-02-19 17:24:53,022 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:24:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5718 states. [2021-02-19 17:24:53,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5718 to 4870. [2021-02-19 17:24:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4870 states, 4869 states have (on average 2.92298213185459) internal successors, (14232), 4869 states have internal predecessors, (14232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4870 states to 4870 states and 14232 transitions. [2021-02-19 17:24:53,076 INFO L78 Accepts]: Start accepts. Automaton has 4870 states and 14232 transitions. Word has length 22 [2021-02-19 17:24:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:53,076 INFO L480 AbstractCegarLoop]: Abstraction has 4870 states and 14232 transitions. [2021-02-19 17:24:53,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 4870 states and 14232 transitions. [2021-02-19 17:24:53,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:53,080 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:53,080 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:53,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3243 [2021-02-19 17:24:53,280 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:53,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:53,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1559007118, now seen corresponding path program 235 times [2021-02-19 17:24:53,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:53,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511456542] [2021-02-19 17:24:53,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:53,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511456542] [2021-02-19 17:24:53,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430361942] [2021-02-19 17:24:53,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:53,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:53,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:53,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:53,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-02-19 17:24:53,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596327284] [2021-02-19 17:24:53,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:53,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:53,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:53,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:53,430 INFO L87 Difference]: Start difference. First operand 4870 states and 14232 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:53,546 INFO L93 Difference]: Finished difference Result 7965 states and 22896 transitions. [2021-02-19 17:24:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:24:53,546 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:53,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:53,555 INFO L225 Difference]: With dead ends: 7965 [2021-02-19 17:24:53,555 INFO L226 Difference]: Without dead ends: 7965 [2021-02-19 17:24:53,555 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:24:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2021-02-19 17:24:53,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 7111. [2021-02-19 17:24:53,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7111 states, 7110 states have (on average 2.968073136427567) internal successors, (21103), 7110 states have internal predecessors, (21103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7111 states to 7111 states and 21103 transitions. [2021-02-19 17:24:53,640 INFO L78 Accepts]: Start accepts. Automaton has 7111 states and 21103 transitions. Word has length 22 [2021-02-19 17:24:53,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:53,640 INFO L480 AbstractCegarLoop]: Abstraction has 7111 states and 21103 transitions. [2021-02-19 17:24:53,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7111 states and 21103 transitions. [2021-02-19 17:24:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:53,645 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:53,645 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:53,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:53,846 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:53,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:53,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2065353384, now seen corresponding path program 236 times [2021-02-19 17:24:53,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:53,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111048870] [2021-02-19 17:24:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:53,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111048870] [2021-02-19 17:24:53,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894749340] [2021-02-19 17:24:53,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:53,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:53,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:53,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:53,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:53,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:53,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:24:53,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570319117] [2021-02-19 17:24:53,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:53,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:53,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:53,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:53,987 INFO L87 Difference]: Start difference. First operand 7111 states and 21103 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:54,152 INFO L93 Difference]: Finished difference Result 8273 states and 23673 transitions. [2021-02-19 17:24:54,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:24:54,157 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:54,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:54,166 INFO L225 Difference]: With dead ends: 8273 [2021-02-19 17:24:54,166 INFO L226 Difference]: Without dead ends: 8273 [2021-02-19 17:24:54,166 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:24:54,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8273 states. [2021-02-19 17:24:54,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8273 to 6967. [2021-02-19 17:24:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6967 states, 6966 states have (on average 2.9654033878840083) internal successors, (20657), 6966 states have internal predecessors, (20657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6967 states to 6967 states and 20657 transitions. [2021-02-19 17:24:54,265 INFO L78 Accepts]: Start accepts. Automaton has 6967 states and 20657 transitions. Word has length 22 [2021-02-19 17:24:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:54,265 INFO L480 AbstractCegarLoop]: Abstraction has 6967 states and 20657 transitions. [2021-02-19 17:24:54,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:54,265 INFO L276 IsEmpty]: Start isEmpty. Operand 6967 states and 20657 transitions. [2021-02-19 17:24:54,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:54,271 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:54,271 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:54,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:54,474 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash -582218446, now seen corresponding path program 237 times [2021-02-19 17:24:54,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:54,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539992194] [2021-02-19 17:24:54,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:54,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539992194] [2021-02-19 17:24:54,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694201424] [2021-02-19 17:24:54,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:54,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:24:54,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:54,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:54,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:54,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:54,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:24:54,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951602003] [2021-02-19 17:24:54,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:54,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:54,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:54,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:54,650 INFO L87 Difference]: Start difference. First operand 6967 states and 20657 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:54,983 INFO L93 Difference]: Finished difference Result 10755 states and 31260 transitions. [2021-02-19 17:24:54,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:24:54,984 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:54,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:54,997 INFO L225 Difference]: With dead ends: 10755 [2021-02-19 17:24:54,997 INFO L226 Difference]: Without dead ends: 10755 [2021-02-19 17:24:54,997 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:24:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2021-02-19 17:24:55,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 8882. [2021-02-19 17:24:55,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8882 states, 8881 states have (on average 3.010584393649364) internal successors, (26737), 8881 states have internal predecessors, (26737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8882 states to 8882 states and 26737 transitions. [2021-02-19 17:24:55,126 INFO L78 Accepts]: Start accepts. Automaton has 8882 states and 26737 transitions. Word has length 22 [2021-02-19 17:24:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:55,127 INFO L480 AbstractCegarLoop]: Abstraction has 8882 states and 26737 transitions. [2021-02-19 17:24:55,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 8882 states and 26737 transitions. [2021-02-19 17:24:55,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:55,135 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:55,135 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:55,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3246,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:55,335 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:55,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:55,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1294538620, now seen corresponding path program 238 times [2021-02-19 17:24:55,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:55,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665326799] [2021-02-19 17:24:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:55,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665326799] [2021-02-19 17:24:55,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330127957] [2021-02-19 17:24:55,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:55,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:55,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:55,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:55,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:55,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:55,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:24:55,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540413550] [2021-02-19 17:24:55,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:24:55,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:55,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:24:55,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:24:55,464 INFO L87 Difference]: Start difference. First operand 8882 states and 26737 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:55,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:55,560 INFO L93 Difference]: Finished difference Result 9202 states and 27152 transitions. [2021-02-19 17:24:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:24:55,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:55,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:55,571 INFO L225 Difference]: With dead ends: 9202 [2021-02-19 17:24:55,571 INFO L226 Difference]: Without dead ends: 9201 [2021-02-19 17:24:55,572 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:24:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9201 states. [2021-02-19 17:24:55,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9201 to 8618. [2021-02-19 17:24:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8618 states, 8617 states have (on average 3.002437043054427) internal successors, (25872), 8617 states have internal predecessors, (25872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8618 states to 8618 states and 25872 transitions. [2021-02-19 17:24:55,709 INFO L78 Accepts]: Start accepts. Automaton has 8618 states and 25872 transitions. Word has length 22 [2021-02-19 17:24:55,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:55,709 INFO L480 AbstractCegarLoop]: Abstraction has 8618 states and 25872 transitions. [2021-02-19 17:24:55,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:55,709 INFO L276 IsEmpty]: Start isEmpty. Operand 8618 states and 25872 transitions. [2021-02-19 17:24:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:55,716 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:55,716 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:55,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3247 [2021-02-19 17:24:55,917 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:55,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:55,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1800884886, now seen corresponding path program 239 times [2021-02-19 17:24:55,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:55,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380837554] [2021-02-19 17:24:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:55,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380837554] [2021-02-19 17:24:55,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282666062] [2021-02-19 17:24:55,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:56,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:24:56,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:56,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:56,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:56,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:56,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:24:56,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259564979] [2021-02-19 17:24:56,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:56,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:56,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:56,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:56,056 INFO L87 Difference]: Start difference. First operand 8618 states and 25872 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:56,222 INFO L93 Difference]: Finished difference Result 9820 states and 28879 transitions. [2021-02-19 17:24:56,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:24:56,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:56,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:56,234 INFO L225 Difference]: With dead ends: 9820 [2021-02-19 17:24:56,234 INFO L226 Difference]: Without dead ends: 9820 [2021-02-19 17:24:56,234 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:24:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9820 states. [2021-02-19 17:24:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9820 to 6006. [2021-02-19 17:24:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6006 states, 6005 states have (on average 2.9410491257285596) internal successors, (17661), 6005 states have internal predecessors, (17661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6006 states to 6006 states and 17661 transitions. [2021-02-19 17:24:56,326 INFO L78 Accepts]: Start accepts. Automaton has 6006 states and 17661 transitions. Word has length 22 [2021-02-19 17:24:56,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:56,326 INFO L480 AbstractCegarLoop]: Abstraction has 6006 states and 17661 transitions. [2021-02-19 17:24:56,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 6006 states and 17661 transitions. [2021-02-19 17:24:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:56,331 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:56,331 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:56,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3248,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:56,531 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:56,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:56,532 INFO L82 PathProgramCache]: Analyzing trace with hash -317749948, now seen corresponding path program 240 times [2021-02-19 17:24:56,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:56,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381532763] [2021-02-19 17:24:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:56,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381532763] [2021-02-19 17:24:56,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590159556] [2021-02-19 17:24:56,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:56,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:24:56,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:56,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:56,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:56,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:56,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:24:56,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271499862] [2021-02-19 17:24:56,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:56,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:56,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:56,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:56,679 INFO L87 Difference]: Start difference. First operand 6006 states and 17661 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:56,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:56,912 INFO L93 Difference]: Finished difference Result 8329 states and 23696 transitions. [2021-02-19 17:24:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:24:56,913 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:56,921 INFO L225 Difference]: With dead ends: 8329 [2021-02-19 17:24:56,921 INFO L226 Difference]: Without dead ends: 8329 [2021-02-19 17:24:56,921 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=362, Invalid=694, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:24:56,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8329 states. [2021-02-19 17:24:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8329 to 4567. [2021-02-19 17:24:56,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4567 states, 4566 states have (on average 2.938677179150241) internal successors, (13418), 4566 states have internal predecessors, (13418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4567 states to 4567 states and 13418 transitions. [2021-02-19 17:24:56,985 INFO L78 Accepts]: Start accepts. Automaton has 4567 states and 13418 transitions. Word has length 22 [2021-02-19 17:24:56,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:56,985 INFO L480 AbstractCegarLoop]: Abstraction has 4567 states and 13418 transitions. [2021-02-19 17:24:56,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 4567 states and 13418 transitions. [2021-02-19 17:24:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:56,988 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:56,988 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:57,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3249,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:57,189 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:57,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:57,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1426614058, now seen corresponding path program 241 times [2021-02-19 17:24:57,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:57,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422717896] [2021-02-19 17:24:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:57,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422717896] [2021-02-19 17:24:57,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824224072] [2021-02-19 17:24:57,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:57,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:57,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:57,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:57,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:24:57,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801306499] [2021-02-19 17:24:57,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:24:57,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:57,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:24:57,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:24:57,348 INFO L87 Difference]: Start difference. First operand 4567 states and 13418 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:57,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:57,557 INFO L93 Difference]: Finished difference Result 7372 states and 21063 transitions. [2021-02-19 17:24:57,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:24:57,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:57,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:57,564 INFO L225 Difference]: With dead ends: 7372 [2021-02-19 17:24:57,565 INFO L226 Difference]: Without dead ends: 7372 [2021-02-19 17:24:57,565 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=319, Invalid=611, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:24:57,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7372 states. [2021-02-19 17:24:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7372 to 6480. [2021-02-19 17:24:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6480 states, 6479 states have (on average 2.9555486957863866) internal successors, (19149), 6479 states have internal predecessors, (19149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6480 states to 6480 states and 19149 transitions. [2021-02-19 17:24:57,641 INFO L78 Accepts]: Start accepts. Automaton has 6480 states and 19149 transitions. Word has length 22 [2021-02-19 17:24:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:57,641 INFO L480 AbstractCegarLoop]: Abstraction has 6480 states and 19149 transitions. [2021-02-19 17:24:57,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 6480 states and 19149 transitions. [2021-02-19 17:24:57,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:57,645 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:57,645 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:57,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3250 [2021-02-19 17:24:57,846 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:57,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:57,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1347661030, now seen corresponding path program 242 times [2021-02-19 17:24:57,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:57,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31329610] [2021-02-19 17:24:57,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:57,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31329610] [2021-02-19 17:24:57,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560750217] [2021-02-19 17:24:57,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:57,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:24:57,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:57,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:57,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:57,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:57,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:57,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338747722] [2021-02-19 17:24:57,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:57,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:57,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:57,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:57,958 INFO L87 Difference]: Start difference. First operand 6480 states and 19149 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:58,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:58,104 INFO L93 Difference]: Finished difference Result 6755 states and 19524 transitions. [2021-02-19 17:24:58,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:24:58,104 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:58,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:58,111 INFO L225 Difference]: With dead ends: 6755 [2021-02-19 17:24:58,111 INFO L226 Difference]: Without dead ends: 6751 [2021-02-19 17:24:58,111 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:24:58,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2021-02-19 17:24:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 6449. [2021-02-19 17:24:58,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6449 states, 6448 states have (on average 2.951767990074442) internal successors, (19033), 6448 states have internal predecessors, (19033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6449 states to 6449 states and 19033 transitions. [2021-02-19 17:24:58,190 INFO L78 Accepts]: Start accepts. Automaton has 6449 states and 19033 transitions. Word has length 22 [2021-02-19 17:24:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:58,190 INFO L480 AbstractCegarLoop]: Abstraction has 6449 states and 19033 transitions. [2021-02-19 17:24:58,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 6449 states and 19033 transitions. [2021-02-19 17:24:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:58,195 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:58,195 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:58,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3251 [2021-02-19 17:24:58,395 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:58,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1229557206, now seen corresponding path program 243 times [2021-02-19 17:24:58,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:58,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442428866] [2021-02-19 17:24:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:58,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442428866] [2021-02-19 17:24:58,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005069235] [2021-02-19 17:24:58,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:58,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:24:58,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:58,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:58,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:58,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:58,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:24:58,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299446215] [2021-02-19 17:24:58,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:24:58,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:58,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:24:58,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:24:58,513 INFO L87 Difference]: Start difference. First operand 6449 states and 19033 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:58,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:58,614 INFO L93 Difference]: Finished difference Result 7274 states and 20862 transitions. [2021-02-19 17:24:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:24:58,614 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:58,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:58,622 INFO L225 Difference]: With dead ends: 7274 [2021-02-19 17:24:58,623 INFO L226 Difference]: Without dead ends: 7274 [2021-02-19 17:24:58,623 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:24:58,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2021-02-19 17:24:58,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 6456. [2021-02-19 17:24:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6456 states, 6455 states have (on average 2.9512006196746707) internal successors, (19050), 6455 states have internal predecessors, (19050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6456 states to 6456 states and 19050 transitions. [2021-02-19 17:24:58,734 INFO L78 Accepts]: Start accepts. Automaton has 6456 states and 19050 transitions. Word has length 22 [2021-02-19 17:24:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:58,734 INFO L480 AbstractCegarLoop]: Abstraction has 6456 states and 19050 transitions. [2021-02-19 17:24:58,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 6456 states and 19050 transitions. [2021-02-19 17:24:58,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:58,739 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:58,739 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:58,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3252 [2021-02-19 17:24:58,939 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:58,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:58,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1336362756, now seen corresponding path program 244 times [2021-02-19 17:24:58,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:58,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763324256] [2021-02-19 17:24:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:58,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763324256] [2021-02-19 17:24:58,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45806292] [2021-02-19 17:24:58,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:59,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:24:59,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:59,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:59,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:24:59,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:59,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:24:59,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554643996] [2021-02-19 17:24:59,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:59,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:59,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:59,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:59,061 INFO L87 Difference]: Start difference. First operand 6456 states and 19050 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:59,188 INFO L93 Difference]: Finished difference Result 7609 states and 21788 transitions. [2021-02-19 17:24:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:24:59,188 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:59,196 INFO L225 Difference]: With dead ends: 7609 [2021-02-19 17:24:59,196 INFO L226 Difference]: Without dead ends: 7609 [2021-02-19 17:24:59,196 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:24:59,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7609 states. [2021-02-19 17:24:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7609 to 6231. [2021-02-19 17:24:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6231 states, 6230 states have (on average 2.9430176565008024) internal successors, (18335), 6230 states have internal predecessors, (18335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6231 states to 6231 states and 18335 transitions. [2021-02-19 17:24:59,285 INFO L78 Accepts]: Start accepts. Automaton has 6231 states and 18335 transitions. Word has length 22 [2021-02-19 17:24:59,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:59,285 INFO L480 AbstractCegarLoop]: Abstraction has 6231 states and 18335 transitions. [2021-02-19 17:24:59,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand 6231 states and 18335 transitions. [2021-02-19 17:24:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:59,290 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:59,290 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:24:59,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3253,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:59,490 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:24:59,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:24:59,491 INFO L82 PathProgramCache]: Analyzing trace with hash -724497046, now seen corresponding path program 245 times [2021-02-19 17:24:59,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:24:59,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411209165] [2021-02-19 17:24:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:24:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:24:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:59,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411209165] [2021-02-19 17:24:59,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599204600] [2021-02-19 17:24:59,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:24:59,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:24:59,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:24:59,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:24:59,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:24:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:24:59,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:24:59,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:24:59,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049370510] [2021-02-19 17:24:59,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:24:59,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:24:59,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:24:59,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:24:59,614 INFO L87 Difference]: Start difference. First operand 6231 states and 18335 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:59,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:24:59,746 INFO L93 Difference]: Finished difference Result 8725 states and 25188 transitions. [2021-02-19 17:24:59,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:24:59,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:24:59,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:24:59,755 INFO L225 Difference]: With dead ends: 8725 [2021-02-19 17:24:59,755 INFO L226 Difference]: Without dead ends: 8725 [2021-02-19 17:24:59,755 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:24:59,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8725 states. [2021-02-19 17:24:59,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8725 to 7805. [2021-02-19 17:24:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7805 states, 7804 states have (on average 2.9860328036904153) internal successors, (23303), 7804 states have internal predecessors, (23303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7805 states to 7805 states and 23303 transitions. [2021-02-19 17:24:59,848 INFO L78 Accepts]: Start accepts. Automaton has 7805 states and 23303 transitions. Word has length 22 [2021-02-19 17:24:59,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:24:59,849 INFO L480 AbstractCegarLoop]: Abstraction has 7805 states and 23303 transitions. [2021-02-19 17:24:59,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:24:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand 7805 states and 23303 transitions. [2021-02-19 17:24:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:24:59,854 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:24:59,854 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:00,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3254 [2021-02-19 17:25:00,055 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:00,055 INFO L82 PathProgramCache]: Analyzing trace with hash -186641468, now seen corresponding path program 246 times [2021-02-19 17:25:00,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:00,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719151519] [2021-02-19 17:25:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:00,120 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:00,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719151519] [2021-02-19 17:25:00,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945518288] [2021-02-19 17:25:00,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:00,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:25:00,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:00,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:00,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:00,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:00,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:25:00,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20121350] [2021-02-19 17:25:00,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:00,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:00,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:00,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:00,189 INFO L87 Difference]: Start difference. First operand 7805 states and 23303 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:00,316 INFO L93 Difference]: Finished difference Result 8476 states and 24523 transitions. [2021-02-19 17:25:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:25:00,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:00,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:00,325 INFO L225 Difference]: With dead ends: 8476 [2021-02-19 17:25:00,325 INFO L226 Difference]: Without dead ends: 8476 [2021-02-19 17:25:00,325 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:25:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8476 states. [2021-02-19 17:25:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8476 to 7121. [2021-02-19 17:25:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7121 states, 7120 states have (on average 2.9780898876404494) internal successors, (21204), 7120 states have internal predecessors, (21204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 21204 transitions. [2021-02-19 17:25:00,413 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 21204 transitions. Word has length 22 [2021-02-19 17:25:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:00,413 INFO L480 AbstractCegarLoop]: Abstraction has 7121 states and 21204 transitions. [2021-02-19 17:25:00,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:00,413 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 21204 transitions. [2021-02-19 17:25:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:00,419 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:00,419 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:00,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3255,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:00,622 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:00,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:00,622 INFO L82 PathProgramCache]: Analyzing trace with hash -692987734, now seen corresponding path program 247 times [2021-02-19 17:25:00,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:00,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359075200] [2021-02-19 17:25:00,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:00,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359075200] [2021-02-19 17:25:00,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809879854] [2021-02-19 17:25:00,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:00,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:00,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:00,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:00,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:25:00,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401530203] [2021-02-19 17:25:00,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:00,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:00,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:00,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:00,753 INFO L87 Difference]: Start difference. First operand 7121 states and 21204 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:00,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:00,875 INFO L93 Difference]: Finished difference Result 10269 states and 30201 transitions. [2021-02-19 17:25:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:25:00,876 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:00,886 INFO L225 Difference]: With dead ends: 10269 [2021-02-19 17:25:00,886 INFO L226 Difference]: Without dead ends: 10269 [2021-02-19 17:25:00,887 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:25:00,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10269 states. [2021-02-19 17:25:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10269 to 9898. [2021-02-19 17:25:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9898 states, 9897 states have (on average 2.9964635748206527) internal successors, (29656), 9897 states have internal predecessors, (29656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9898 states to 9898 states and 29656 transitions. [2021-02-19 17:25:01,003 INFO L78 Accepts]: Start accepts. Automaton has 9898 states and 29656 transitions. Word has length 22 [2021-02-19 17:25:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:01,003 INFO L480 AbstractCegarLoop]: Abstraction has 9898 states and 29656 transitions. [2021-02-19 17:25:01,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 9898 states and 29656 transitions. [2021-02-19 17:25:01,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:01,012 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:01,012 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:01,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3256,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:01,212 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:01,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:01,213 INFO L82 PathProgramCache]: Analyzing trace with hash 790147204, now seen corresponding path program 248 times [2021-02-19 17:25:01,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:01,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147327792] [2021-02-19 17:25:01,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:01,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147327792] [2021-02-19 17:25:01,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496118825] [2021-02-19 17:25:01,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:25:01,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:01,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:01,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:01,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:01,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:01,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:25:01,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009142336] [2021-02-19 17:25:01,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:01,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:01,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:01,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:01,385 INFO L87 Difference]: Start difference. First operand 9898 states and 29656 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:01,628 INFO L93 Difference]: Finished difference Result 10414 states and 30566 transitions. [2021-02-19 17:25:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:25:01,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:01,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:01,639 INFO L225 Difference]: With dead ends: 10414 [2021-02-19 17:25:01,639 INFO L226 Difference]: Without dead ends: 10414 [2021-02-19 17:25:01,639 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:25:01,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10414 states. [2021-02-19 17:25:01,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10414 to 9719. [2021-02-19 17:25:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9719 states, 9718 states have (on average 2.996398435892159) internal successors, (29119), 9718 states have internal predecessors, (29119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9719 states to 9719 states and 29119 transitions. [2021-02-19 17:25:01,760 INFO L78 Accepts]: Start accepts. Automaton has 9719 states and 29119 transitions. Word has length 22 [2021-02-19 17:25:01,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:01,760 INFO L480 AbstractCegarLoop]: Abstraction has 9719 states and 29119 transitions. [2021-02-19 17:25:01,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 9719 states and 29119 transitions. [2021-02-19 17:25:01,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:01,771 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:01,771 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:01,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3257,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:01,986 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:01,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:01,986 INFO L82 PathProgramCache]: Analyzing trace with hash -477309974, now seen corresponding path program 249 times [2021-02-19 17:25:01,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:01,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208486947] [2021-02-19 17:25:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:02,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208486947] [2021-02-19 17:25:02,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994320135] [2021-02-19 17:25:02,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:02,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:25:02,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:02,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:02,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:02,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:02,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:25:02,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186580421] [2021-02-19 17:25:02,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:02,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:02,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:02,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:02,137 INFO L87 Difference]: Start difference. First operand 9719 states and 29119 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:02,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:02,438 INFO L93 Difference]: Finished difference Result 11788 states and 34666 transitions. [2021-02-19 17:25:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:25:02,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:02,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:02,453 INFO L225 Difference]: With dead ends: 11788 [2021-02-19 17:25:02,453 INFO L226 Difference]: Without dead ends: 11788 [2021-02-19 17:25:02,453 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=448, Invalid=884, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 17:25:02,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11788 states. [2021-02-19 17:25:02,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11788 to 11030. [2021-02-19 17:25:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11030 states, 11029 states have (on average 2.999727989844954) internal successors, (33084), 11029 states have internal predecessors, (33084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:02,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 33084 transitions. [2021-02-19 17:25:02,605 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 33084 transitions. Word has length 22 [2021-02-19 17:25:02,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:02,605 INFO L480 AbstractCegarLoop]: Abstraction has 11030 states and 33084 transitions. [2021-02-19 17:25:02,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 33084 transitions. [2021-02-19 17:25:02,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:02,614 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:02,614 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:02,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3258,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:02,814 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:02,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:02,815 INFO L82 PathProgramCache]: Analyzing trace with hash -430129998, now seen corresponding path program 250 times [2021-02-19 17:25:02,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:02,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389805978] [2021-02-19 17:25:02,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:02,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389805978] [2021-02-19 17:25:02,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676957236] [2021-02-19 17:25:02,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:02,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:02,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:02,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:02,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:02,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:02,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:25:02,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543099380] [2021-02-19 17:25:02,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:02,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:02,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:02,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:02,945 INFO L87 Difference]: Start difference. First operand 11030 states and 33084 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:03,184 INFO L93 Difference]: Finished difference Result 11413 states and 33691 transitions. [2021-02-19 17:25:03,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:25:03,185 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:03,197 INFO L225 Difference]: With dead ends: 11413 [2021-02-19 17:25:03,197 INFO L226 Difference]: Without dead ends: 11405 [2021-02-19 17:25:03,197 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:25:03,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11405 states. [2021-02-19 17:25:03,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11405 to 11072. [2021-02-19 17:25:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11072 states, 11071 states have (on average 3.0008129346942463) internal successors, (33222), 11071 states have internal predecessors, (33222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11072 states to 11072 states and 33222 transitions. [2021-02-19 17:25:03,331 INFO L78 Accepts]: Start accepts. Automaton has 11072 states and 33222 transitions. Word has length 22 [2021-02-19 17:25:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:03,331 INFO L480 AbstractCegarLoop]: Abstraction has 11072 states and 33222 transitions. [2021-02-19 17:25:03,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:03,331 INFO L276 IsEmpty]: Start isEmpty. Operand 11072 states and 33222 transitions. [2021-02-19 17:25:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:03,339 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:03,339 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:03,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3259 [2021-02-19 17:25:03,540 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:03,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:03,540 INFO L82 PathProgramCache]: Analyzing trace with hash -261361422, now seen corresponding path program 251 times [2021-02-19 17:25:03,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:03,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619439398] [2021-02-19 17:25:03,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:03,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619439398] [2021-02-19 17:25:03,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542388896] [2021-02-19 17:25:03,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:03,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:25:03,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:03,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:03,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:03,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:03,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:25:03,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617498417] [2021-02-19 17:25:03,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:03,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:03,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:03,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:03,683 INFO L87 Difference]: Start difference. First operand 11072 states and 33222 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:03,910 INFO L93 Difference]: Finished difference Result 14221 states and 42193 transitions. [2021-02-19 17:25:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:25:03,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:03,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:03,928 INFO L225 Difference]: With dead ends: 14221 [2021-02-19 17:25:03,928 INFO L226 Difference]: Without dead ends: 14221 [2021-02-19 17:25:03,929 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:25:03,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14221 states. [2021-02-19 17:25:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14221 to 8491. [2021-02-19 17:25:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8491 states, 8490 states have (on average 2.979505300353357) internal successors, (25296), 8490 states have internal predecessors, (25296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8491 states to 8491 states and 25296 transitions. [2021-02-19 17:25:04,061 INFO L78 Accepts]: Start accepts. Automaton has 8491 states and 25296 transitions. Word has length 22 [2021-02-19 17:25:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:04,062 INFO L480 AbstractCegarLoop]: Abstraction has 8491 states and 25296 transitions. [2021-02-19 17:25:04,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:04,062 INFO L276 IsEmpty]: Start isEmpty. Operand 8491 states and 25296 transitions. [2021-02-19 17:25:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:04,069 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:04,069 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:04,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3260 [2021-02-19 17:25:04,271 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:04,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:04,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1882494770, now seen corresponding path program 252 times [2021-02-19 17:25:04,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:04,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56777577] [2021-02-19 17:25:04,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:04,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56777577] [2021-02-19 17:25:04,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674678931] [2021-02-19 17:25:04,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:04,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:25:04,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:04,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:04,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:04,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:25:04,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87633457] [2021-02-19 17:25:04,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:25:04,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:04,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:25:04,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:25:04,451 INFO L87 Difference]: Start difference. First operand 8491 states and 25296 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:04,588 INFO L93 Difference]: Finished difference Result 9490 states and 27682 transitions. [2021-02-19 17:25:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:25:04,589 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:04,600 INFO L225 Difference]: With dead ends: 9490 [2021-02-19 17:25:04,600 INFO L226 Difference]: Without dead ends: 9490 [2021-02-19 17:25:04,600 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:25:04,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9490 states. [2021-02-19 17:25:04,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9490 to 8583. [2021-02-19 17:25:04,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8583 states, 8582 states have (on average 2.978326730365882) internal successors, (25560), 8582 states have internal predecessors, (25560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8583 states to 8583 states and 25560 transitions. [2021-02-19 17:25:04,708 INFO L78 Accepts]: Start accepts. Automaton has 8583 states and 25560 transitions. Word has length 22 [2021-02-19 17:25:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:04,709 INFO L480 AbstractCegarLoop]: Abstraction has 8583 states and 25560 transitions. [2021-02-19 17:25:04,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 8583 states and 25560 transitions. [2021-02-19 17:25:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:04,716 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:04,716 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:04,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:04,917 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:04,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1874616948, now seen corresponding path program 253 times [2021-02-19 17:25:04,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:04,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788932103] [2021-02-19 17:25:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:04,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788932103] [2021-02-19 17:25:04,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254016449] [2021-02-19 17:25:04,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:05,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:05,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:05,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:05,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:25:05,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428151695] [2021-02-19 17:25:05,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:05,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:05,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:05,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:05,063 INFO L87 Difference]: Start difference. First operand 8583 states and 25560 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:05,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:05,198 INFO L93 Difference]: Finished difference Result 9279 states and 27105 transitions. [2021-02-19 17:25:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:25:05,199 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:05,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:05,210 INFO L225 Difference]: With dead ends: 9279 [2021-02-19 17:25:05,210 INFO L226 Difference]: Without dead ends: 9279 [2021-02-19 17:25:05,210 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:25:05,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9279 states. [2021-02-19 17:25:05,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9279 to 6711. [2021-02-19 17:25:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6711 states, 6710 states have (on average 2.9648286140089417) internal successors, (19894), 6710 states have internal predecessors, (19894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:05,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6711 states to 6711 states and 19894 transitions. [2021-02-19 17:25:05,303 INFO L78 Accepts]: Start accepts. Automaton has 6711 states and 19894 transitions. Word has length 22 [2021-02-19 17:25:05,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:05,304 INFO L480 AbstractCegarLoop]: Abstraction has 6711 states and 19894 transitions. [2021-02-19 17:25:05,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:05,304 INFO L276 IsEmpty]: Start isEmpty. Operand 6711 states and 19894 transitions. [2021-02-19 17:25:05,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:05,309 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:05,309 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:05,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3262 [2021-02-19 17:25:05,509 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:05,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:05,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1914004082, now seen corresponding path program 254 times [2021-02-19 17:25:05,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:05,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161803324] [2021-02-19 17:25:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:05,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161803324] [2021-02-19 17:25:05,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299473790] [2021-02-19 17:25:05,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:05,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:05,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:05,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:05,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:05,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:05,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:25:05,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638624111] [2021-02-19 17:25:05,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:05,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:05,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:05,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:05,655 INFO L87 Difference]: Start difference. First operand 6711 states and 19894 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:05,771 INFO L93 Difference]: Finished difference Result 8248 states and 23898 transitions. [2021-02-19 17:25:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:25:05,772 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:05,779 INFO L225 Difference]: With dead ends: 8248 [2021-02-19 17:25:05,779 INFO L226 Difference]: Without dead ends: 8248 [2021-02-19 17:25:05,779 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:25:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2021-02-19 17:25:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 7625. [2021-02-19 17:25:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 2.96196222455404) internal successors, (22582), 7624 states have internal predecessors, (22582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 22582 transitions. [2021-02-19 17:25:05,863 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 22582 transitions. Word has length 22 [2021-02-19 17:25:05,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:05,863 INFO L480 AbstractCegarLoop]: Abstraction has 7625 states and 22582 transitions. [2021-02-19 17:25:05,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:05,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 22582 transitions. [2021-02-19 17:25:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:05,869 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:05,869 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:06,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3263,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:06,070 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:06,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:06,070 INFO L82 PathProgramCache]: Analyzing trace with hash -897828276, now seen corresponding path program 255 times [2021-02-19 17:25:06,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:06,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342749645] [2021-02-19 17:25:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:06,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342749645] [2021-02-19 17:25:06,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680526740] [2021-02-19 17:25:06,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:06,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:25:06,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:06,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:06,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:06,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:06,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:25:06,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913270829] [2021-02-19 17:25:06,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:06,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:06,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:06,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:06,241 INFO L87 Difference]: Start difference. First operand 7625 states and 22582 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:06,424 INFO L93 Difference]: Finished difference Result 8431 states and 24323 transitions. [2021-02-19 17:25:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:25:06,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:06,433 INFO L225 Difference]: With dead ends: 8431 [2021-02-19 17:25:06,433 INFO L226 Difference]: Without dead ends: 8431 [2021-02-19 17:25:06,433 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:25:06,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8431 states. [2021-02-19 17:25:06,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8431 to 6996. [2021-02-19 17:25:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6996 states, 6995 states have (on average 2.9558255897069334) internal successors, (20676), 6995 states have internal predecessors, (20676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 20676 transitions. [2021-02-19 17:25:06,513 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 20676 transitions. Word has length 22 [2021-02-19 17:25:06,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:06,513 INFO L480 AbstractCegarLoop]: Abstraction has 6996 states and 20676 transitions. [2021-02-19 17:25:06,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 20676 transitions. [2021-02-19 17:25:06,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:06,518 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:06,518 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:06,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3264 [2021-02-19 17:25:06,719 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:06,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:06,720 INFO L82 PathProgramCache]: Analyzing trace with hash 2129681842, now seen corresponding path program 256 times [2021-02-19 17:25:06,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:06,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255725041] [2021-02-19 17:25:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:06,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255725041] [2021-02-19 17:25:06,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112515099] [2021-02-19 17:25:06,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:06,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:06,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:06,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:06,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:06,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:06,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:25:06,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313200094] [2021-02-19 17:25:06,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:06,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:06,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:06,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:06,868 INFO L87 Difference]: Start difference. First operand 6996 states and 20676 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:07,147 INFO L93 Difference]: Finished difference Result 8466 states and 24249 transitions. [2021-02-19 17:25:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:25:07,148 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:07,156 INFO L225 Difference]: With dead ends: 8466 [2021-02-19 17:25:07,156 INFO L226 Difference]: Without dead ends: 8466 [2021-02-19 17:25:07,156 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=447, Invalid=885, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 17:25:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8466 states. [2021-02-19 17:25:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8466 to 6771. [2021-02-19 17:25:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6771 states, 6770 states have (on average 2.972378138847858) internal successors, (20123), 6770 states have internal predecessors, (20123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6771 states to 6771 states and 20123 transitions. [2021-02-19 17:25:07,271 INFO L78 Accepts]: Start accepts. Automaton has 6771 states and 20123 transitions. Word has length 22 [2021-02-19 17:25:07,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:07,271 INFO L480 AbstractCegarLoop]: Abstraction has 6771 states and 20123 transitions. [2021-02-19 17:25:07,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:07,271 INFO L276 IsEmpty]: Start isEmpty. Operand 6771 states and 20123 transitions. [2021-02-19 17:25:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:07,276 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:07,276 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:07,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3265 [2021-02-19 17:25:07,476 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:07,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1148713068, now seen corresponding path program 257 times [2021-02-19 17:25:07,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:07,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110231252] [2021-02-19 17:25:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:07,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110231252] [2021-02-19 17:25:07,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394262637] [2021-02-19 17:25:07,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:07,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:25:07,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:07,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:07,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:07,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:07,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:25:07,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673144061] [2021-02-19 17:25:07,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:25:07,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:07,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:25:07,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:25:07,595 INFO L87 Difference]: Start difference. First operand 6771 states and 20123 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:07,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:07,791 INFO L93 Difference]: Finished difference Result 7052 states and 20488 transitions. [2021-02-19 17:25:07,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:25:07,791 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:07,798 INFO L225 Difference]: With dead ends: 7052 [2021-02-19 17:25:07,799 INFO L226 Difference]: Without dead ends: 7046 [2021-02-19 17:25:07,799 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:25:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2021-02-19 17:25:07,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 6574. [2021-02-19 17:25:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6574 states, 6573 states have (on average 2.960900654191389) internal successors, (19462), 6573 states have internal predecessors, (19462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6574 states to 6574 states and 19462 transitions. [2021-02-19 17:25:07,883 INFO L78 Accepts]: Start accepts. Automaton has 6574 states and 19462 transitions. Word has length 22 [2021-02-19 17:25:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:07,883 INFO L480 AbstractCegarLoop]: Abstraction has 6574 states and 19462 transitions. [2021-02-19 17:25:07,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 6574 states and 19462 transitions. [2021-02-19 17:25:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:07,888 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:07,888 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:08,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3266,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:08,088 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:08,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1084398888, now seen corresponding path program 258 times [2021-02-19 17:25:08,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:08,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295402179] [2021-02-19 17:25:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:08,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295402179] [2021-02-19 17:25:08,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733672567] [2021-02-19 17:25:08,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:08,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:25:08,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:08,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:08,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:08,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:08,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:25:08,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243633912] [2021-02-19 17:25:08,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:08,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:08,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:08,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:08,233 INFO L87 Difference]: Start difference. First operand 6574 states and 19462 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:08,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:08,336 INFO L93 Difference]: Finished difference Result 6747 states and 19617 transitions. [2021-02-19 17:25:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:25:08,337 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:08,343 INFO L225 Difference]: With dead ends: 6747 [2021-02-19 17:25:08,344 INFO L226 Difference]: Without dead ends: 6745 [2021-02-19 17:25:08,344 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:25:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6745 states. [2021-02-19 17:25:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6745 to 6334. [2021-02-19 17:25:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6334 states, 6333 states have (on average 2.9553134375493446) internal successors, (18716), 6333 states have internal predecessors, (18716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6334 states to 6334 states and 18716 transitions. [2021-02-19 17:25:08,417 INFO L78 Accepts]: Start accepts. Automaton has 6334 states and 18716 transitions. Word has length 22 [2021-02-19 17:25:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:08,417 INFO L480 AbstractCegarLoop]: Abstraction has 6334 states and 18716 transitions. [2021-02-19 17:25:08,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 6334 states and 18716 transitions. [2021-02-19 17:25:08,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:08,422 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:08,422 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:08,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3267,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:08,622 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:08,622 INFO L82 PathProgramCache]: Analyzing trace with hash 398736050, now seen corresponding path program 259 times [2021-02-19 17:25:08,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:08,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608787277] [2021-02-19 17:25:08,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:08,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608787277] [2021-02-19 17:25:08,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598657928] [2021-02-19 17:25:08,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:08,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:08,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:08,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:08,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:25:08,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748031759] [2021-02-19 17:25:08,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:08,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:08,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:08,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:08,775 INFO L87 Difference]: Start difference. First operand 6334 states and 18716 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:08,957 INFO L93 Difference]: Finished difference Result 6794 states and 19701 transitions. [2021-02-19 17:25:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:25:08,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:08,964 INFO L225 Difference]: With dead ends: 6794 [2021-02-19 17:25:08,964 INFO L226 Difference]: Without dead ends: 6794 [2021-02-19 17:25:08,964 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:25:08,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6794 states. [2021-02-19 17:25:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6794 to 5771. [2021-02-19 17:25:09,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5771 states, 5770 states have (on average 2.946100519930676) internal successors, (16999), 5770 states have internal predecessors, (16999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:09,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5771 states to 5771 states and 16999 transitions. [2021-02-19 17:25:09,035 INFO L78 Accepts]: Start accepts. Automaton has 5771 states and 16999 transitions. Word has length 22 [2021-02-19 17:25:09,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:09,035 INFO L480 AbstractCegarLoop]: Abstraction has 5771 states and 16999 transitions. [2021-02-19 17:25:09,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:09,035 INFO L276 IsEmpty]: Start isEmpty. Operand 5771 states and 16999 transitions. [2021-02-19 17:25:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:09,039 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:09,039 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:09,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3268,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:09,240 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash -868721128, now seen corresponding path program 260 times [2021-02-19 17:25:09,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:09,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083066254] [2021-02-19 17:25:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:09,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083066254] [2021-02-19 17:25:09,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423779617] [2021-02-19 17:25:09,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:09,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:09,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:09,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:09,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:09,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:25:09,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774272783] [2021-02-19 17:25:09,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:09,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:09,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:09,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:09,399 INFO L87 Difference]: Start difference. First operand 5771 states and 16999 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:09,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:09,681 INFO L93 Difference]: Finished difference Result 6794 states and 19368 transitions. [2021-02-19 17:25:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:25:09,681 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:09,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:09,687 INFO L225 Difference]: With dead ends: 6794 [2021-02-19 17:25:09,687 INFO L226 Difference]: Without dead ends: 6794 [2021-02-19 17:25:09,688 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:25:09,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6794 states. [2021-02-19 17:25:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6794 to 5609. [2021-02-19 17:25:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5609 states, 5608 states have (on average 2.9598787446504993) internal successors, (16599), 5608 states have internal predecessors, (16599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5609 states to 5609 states and 16599 transitions. [2021-02-19 17:25:09,747 INFO L78 Accepts]: Start accepts. Automaton has 5609 states and 16599 transitions. Word has length 22 [2021-02-19 17:25:09,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:09,747 INFO L480 AbstractCegarLoop]: Abstraction has 5609 states and 16599 transitions. [2021-02-19 17:25:09,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:09,747 INFO L276 IsEmpty]: Start isEmpty. Operand 5609 states and 16599 transitions. [2021-02-19 17:25:09,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:09,751 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:09,751 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:09,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3269,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:09,951 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:09,951 INFO L82 PathProgramCache]: Analyzing trace with hash -63514510, now seen corresponding path program 261 times [2021-02-19 17:25:09,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:09,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495847163] [2021-02-19 17:25:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:10,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495847163] [2021-02-19 17:25:10,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491489251] [2021-02-19 17:25:10,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:10,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:25:10,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:10,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:10,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:10,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:10,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:25:10,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539714675] [2021-02-19 17:25:10,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:25:10,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:10,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:25:10,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:25:10,071 INFO L87 Difference]: Start difference. First operand 5609 states and 16599 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:10,226 INFO L93 Difference]: Finished difference Result 5802 states and 16827 transitions. [2021-02-19 17:25:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:25:10,227 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:10,232 INFO L225 Difference]: With dead ends: 5802 [2021-02-19 17:25:10,233 INFO L226 Difference]: Without dead ends: 5798 [2021-02-19 17:25:10,233 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:25:10,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2021-02-19 17:25:10,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5602. [2021-02-19 17:25:10,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5602 states, 5601 states have (on average 2.9585788252097838) internal successors, (16571), 5601 states have internal predecessors, (16571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5602 states to 5602 states and 16571 transitions. [2021-02-19 17:25:10,318 INFO L78 Accepts]: Start accepts. Automaton has 5602 states and 16571 transitions. Word has length 22 [2021-02-19 17:25:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:10,318 INFO L480 AbstractCegarLoop]: Abstraction has 5602 states and 16571 transitions. [2021-02-19 17:25:10,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 5602 states and 16571 transitions. [2021-02-19 17:25:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:10,322 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:10,322 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:10,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3270 [2021-02-19 17:25:10,522 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:10,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:10,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1666955506, now seen corresponding path program 262 times [2021-02-19 17:25:10,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:10,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809273575] [2021-02-19 17:25:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:10,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809273575] [2021-02-19 17:25:10,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355854252] [2021-02-19 17:25:10,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:10,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:10,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:10,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:10,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:10,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:10,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:25:10,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469667120] [2021-02-19 17:25:10,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:10,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:10,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:10,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:10,680 INFO L87 Difference]: Start difference. First operand 5602 states and 16571 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:10,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:10,931 INFO L93 Difference]: Finished difference Result 7153 states and 20488 transitions. [2021-02-19 17:25:10,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:25:10,931 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:10,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:10,938 INFO L225 Difference]: With dead ends: 7153 [2021-02-19 17:25:10,938 INFO L226 Difference]: Without dead ends: 7153 [2021-02-19 17:25:10,938 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:25:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7153 states. [2021-02-19 17:25:10,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7153 to 6574. [2021-02-19 17:25:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6574 states, 6573 states have (on average 2.9549672904305493) internal successors, (19423), 6573 states have internal predecessors, (19423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6574 states to 6574 states and 19423 transitions. [2021-02-19 17:25:11,012 INFO L78 Accepts]: Start accepts. Automaton has 6574 states and 19423 transitions. Word has length 22 [2021-02-19 17:25:11,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:11,012 INFO L480 AbstractCegarLoop]: Abstraction has 6574 states and 19423 transitions. [2021-02-19 17:25:11,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:11,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6574 states and 19423 transitions. [2021-02-19 17:25:11,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:11,016 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:11,016 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:11,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3271 [2021-02-19 17:25:11,217 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:11,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:11,217 INFO L82 PathProgramCache]: Analyzing trace with hash 941323220, now seen corresponding path program 263 times [2021-02-19 17:25:11,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:11,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380848959] [2021-02-19 17:25:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:11,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380848959] [2021-02-19 17:25:11,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491157557] [2021-02-19 17:25:11,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:11,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:25:11,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:11,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:11,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:11,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:11,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:25:11,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301495589] [2021-02-19 17:25:11,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:25:11,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:11,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:25:11,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:25:11,331 INFO L87 Difference]: Start difference. First operand 6574 states and 19423 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:11,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:11,483 INFO L93 Difference]: Finished difference Result 6812 states and 19731 transitions. [2021-02-19 17:25:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:25:11,484 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:11,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:11,490 INFO L225 Difference]: With dead ends: 6812 [2021-02-19 17:25:11,490 INFO L226 Difference]: Without dead ends: 6808 [2021-02-19 17:25:11,490 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:25:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6808 states. [2021-02-19 17:25:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6808 to 6588. [2021-02-19 17:25:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6588 states, 6587 states have (on average 2.9552148170639136) internal successors, (19466), 6587 states have internal predecessors, (19466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6588 states to 6588 states and 19466 transitions. [2021-02-19 17:25:11,567 INFO L78 Accepts]: Start accepts. Automaton has 6588 states and 19466 transitions. Word has length 22 [2021-02-19 17:25:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:11,567 INFO L480 AbstractCegarLoop]: Abstraction has 6588 states and 19466 transitions. [2021-02-19 17:25:11,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:11,567 INFO L276 IsEmpty]: Start isEmpty. Operand 6588 states and 19466 transitions. [2021-02-19 17:25:11,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:11,572 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:11,572 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:11,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3272 [2021-02-19 17:25:11,772 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:11,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1635895016, now seen corresponding path program 264 times [2021-02-19 17:25:11,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:11,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721696620] [2021-02-19 17:25:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:11,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721696620] [2021-02-19 17:25:11,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421088920] [2021-02-19 17:25:11,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:11,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:25:11,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:11,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:11,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:11,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:11,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:25:11,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779308740] [2021-02-19 17:25:11,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:25:11,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:11,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:25:11,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:25:11,893 INFO L87 Difference]: Start difference. First operand 6588 states and 19466 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:12,001 INFO L93 Difference]: Finished difference Result 7125 states and 20557 transitions. [2021-02-19 17:25:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:25:12,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:12,008 INFO L225 Difference]: With dead ends: 7125 [2021-02-19 17:25:12,008 INFO L226 Difference]: Without dead ends: 7125 [2021-02-19 17:25:12,008 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:25:12,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7125 states. [2021-02-19 17:25:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7125 to 6589. [2021-02-19 17:25:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6589 states, 6588 states have (on average 2.9547662416514875) internal successors, (19466), 6588 states have internal predecessors, (19466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:12,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6589 states to 6589 states and 19466 transitions. [2021-02-19 17:25:12,085 INFO L78 Accepts]: Start accepts. Automaton has 6589 states and 19466 transitions. Word has length 22 [2021-02-19 17:25:12,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:12,085 INFO L480 AbstractCegarLoop]: Abstraction has 6589 states and 19466 transitions. [2021-02-19 17:25:12,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:12,085 INFO L276 IsEmpty]: Start isEmpty. Operand 6589 states and 19466 transitions. [2021-02-19 17:25:12,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:12,090 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:12,090 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:12,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3273 [2021-02-19 17:25:12,290 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:12,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:12,290 INFO L82 PathProgramCache]: Analyzing trace with hash 930024946, now seen corresponding path program 265 times [2021-02-19 17:25:12,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:12,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819043928] [2021-02-19 17:25:12,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:12,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819043928] [2021-02-19 17:25:12,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287247431] [2021-02-19 17:25:12,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:12,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:12,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:12,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:12,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-02-19 17:25:12,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950972866] [2021-02-19 17:25:12,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:25:12,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:12,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:25:12,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:25:12,419 INFO L87 Difference]: Start difference. First operand 6589 states and 19466 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:12,565 INFO L93 Difference]: Finished difference Result 7366 states and 21192 transitions. [2021-02-19 17:25:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:25:12,566 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:12,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:12,573 INFO L225 Difference]: With dead ends: 7366 [2021-02-19 17:25:12,573 INFO L226 Difference]: Without dead ends: 7366 [2021-02-19 17:25:12,573 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:25:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7366 states. [2021-02-19 17:25:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7366 to 6589. [2021-02-19 17:25:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6589 states, 6588 states have (on average 2.95461445051609) internal successors, (19465), 6588 states have internal predecessors, (19465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6589 states to 6589 states and 19465 transitions. [2021-02-19 17:25:12,644 INFO L78 Accepts]: Start accepts. Automaton has 6589 states and 19465 transitions. Word has length 22 [2021-02-19 17:25:12,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:12,644 INFO L480 AbstractCegarLoop]: Abstraction has 6589 states and 19465 transitions. [2021-02-19 17:25:12,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:12,644 INFO L276 IsEmpty]: Start isEmpty. Operand 6589 states and 19465 transitions. [2021-02-19 17:25:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:12,649 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:12,649 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:12,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3274 [2021-02-19 17:25:12,849 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:12,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:12,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1130834856, now seen corresponding path program 266 times [2021-02-19 17:25:12,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:12,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596992232] [2021-02-19 17:25:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:12,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596992232] [2021-02-19 17:25:12,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176471125] [2021-02-19 17:25:12,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:12,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:12,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:12,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:12,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:12,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:12,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-02-19 17:25:12,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319733486] [2021-02-19 17:25:12,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:12,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:12,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:12,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:12,982 INFO L87 Difference]: Start difference. First operand 6589 states and 19465 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:13,157 INFO L93 Difference]: Finished difference Result 7455 states and 21443 transitions. [2021-02-19 17:25:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:25:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:13,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:13,164 INFO L225 Difference]: With dead ends: 7455 [2021-02-19 17:25:13,164 INFO L226 Difference]: Without dead ends: 7455 [2021-02-19 17:25:13,164 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:25:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7455 states. [2021-02-19 17:25:13,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7455 to 6598. [2021-02-19 17:25:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6598 states, 6597 states have (on average 2.9546763680460817) internal successors, (19492), 6597 states have internal predecessors, (19492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6598 states to 6598 states and 19492 transitions. [2021-02-19 17:25:13,239 INFO L78 Accepts]: Start accepts. Automaton has 6598 states and 19492 transitions. Word has length 22 [2021-02-19 17:25:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:13,239 INFO L480 AbstractCegarLoop]: Abstraction has 6598 states and 19492 transitions. [2021-02-19 17:25:13,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand 6598 states and 19492 transitions. [2021-02-19 17:25:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:13,244 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:13,244 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:13,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3275 [2021-02-19 17:25:13,444 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:13,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:13,444 INFO L82 PathProgramCache]: Analyzing trace with hash -592979278, now seen corresponding path program 267 times [2021-02-19 17:25:13,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:13,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114579541] [2021-02-19 17:25:13,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:13,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114579541] [2021-02-19 17:25:13,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648087641] [2021-02-19 17:25:13,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:13,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:25:13,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:13,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:13,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:13,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:13,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-02-19 17:25:13,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240879403] [2021-02-19 17:25:13,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:13,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:13,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:13,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:13,613 INFO L87 Difference]: Start difference. First operand 6598 states and 19492 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:13,786 INFO L93 Difference]: Finished difference Result 8245 states and 23737 transitions. [2021-02-19 17:25:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:25:13,786 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:13,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:13,795 INFO L225 Difference]: With dead ends: 8245 [2021-02-19 17:25:13,795 INFO L226 Difference]: Without dead ends: 8245 [2021-02-19 17:25:13,795 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:25:13,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8245 states. [2021-02-19 17:25:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8245 to 7494. [2021-02-19 17:25:13,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7494 states, 7493 states have (on average 2.9679701054317364) internal successors, (22239), 7493 states have internal predecessors, (22239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:13,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7494 states to 7494 states and 22239 transitions. [2021-02-19 17:25:13,886 INFO L78 Accepts]: Start accepts. Automaton has 7494 states and 22239 transitions. Word has length 22 [2021-02-19 17:25:13,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:13,886 INFO L480 AbstractCegarLoop]: Abstraction has 7494 states and 22239 transitions. [2021-02-19 17:25:13,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:13,886 INFO L276 IsEmpty]: Start isEmpty. Operand 7494 states and 22239 transitions. [2021-02-19 17:25:13,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:13,891 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:13,891 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:14,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-02-19 17:25:14,092 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:14,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:14,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1099325544, now seen corresponding path program 268 times [2021-02-19 17:25:14,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:14,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735388257] [2021-02-19 17:25:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:14,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735388257] [2021-02-19 17:25:14,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558962796] [2021-02-19 17:25:14,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:14,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:14,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:14,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:14,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:14,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:14,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:25:14,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966540036] [2021-02-19 17:25:14,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:14,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:14,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:14,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:14,235 INFO L87 Difference]: Start difference. First operand 7494 states and 22239 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:14,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:14,390 INFO L93 Difference]: Finished difference Result 8095 states and 23385 transitions. [2021-02-19 17:25:14,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:25:14,391 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:14,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:14,399 INFO L225 Difference]: With dead ends: 8095 [2021-02-19 17:25:14,400 INFO L226 Difference]: Without dead ends: 8095 [2021-02-19 17:25:14,400 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:25:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8095 states. [2021-02-19 17:25:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8095 to 7438. [2021-02-19 17:25:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7438 states, 7437 states have (on average 2.9666532203845635) internal successors, (22063), 7437 states have internal predecessors, (22063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7438 states to 7438 states and 22063 transitions. [2021-02-19 17:25:14,490 INFO L78 Accepts]: Start accepts. Automaton has 7438 states and 22063 transitions. Word has length 22 [2021-02-19 17:25:14,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:14,490 INFO L480 AbstractCegarLoop]: Abstraction has 7438 states and 22063 transitions. [2021-02-19 17:25:14,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 7438 states and 22063 transitions. [2021-02-19 17:25:14,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:14,496 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:14,496 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:14,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3277,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:14,696 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:14,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:14,696 INFO L82 PathProgramCache]: Analyzing trace with hash 383809394, now seen corresponding path program 269 times [2021-02-19 17:25:14,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:14,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386750275] [2021-02-19 17:25:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:14,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386750275] [2021-02-19 17:25:14,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980107957] [2021-02-19 17:25:14,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:14,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:25:14,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:14,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:14,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:14,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:14,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:25:14,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260603376] [2021-02-19 17:25:14,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:14,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:14,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:14,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:14,863 INFO L87 Difference]: Start difference. First operand 7438 states and 22063 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:15,050 INFO L93 Difference]: Finished difference Result 9427 states and 27454 transitions. [2021-02-19 17:25:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:25:15,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:15,061 INFO L225 Difference]: With dead ends: 9427 [2021-02-19 17:25:15,061 INFO L226 Difference]: Without dead ends: 9427 [2021-02-19 17:25:15,061 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:25:15,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9427 states. [2021-02-19 17:25:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9427 to 8885. [2021-02-19 17:25:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8885 states, 8884 states have (on average 2.9720846465556057) internal successors, (26404), 8884 states have internal predecessors, (26404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:15,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8885 states to 8885 states and 26404 transitions. [2021-02-19 17:25:15,168 INFO L78 Accepts]: Start accepts. Automaton has 8885 states and 26404 transitions. Word has length 22 [2021-02-19 17:25:15,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:15,168 INFO L480 AbstractCegarLoop]: Abstraction has 8885 states and 26404 transitions. [2021-02-19 17:25:15,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:15,169 INFO L276 IsEmpty]: Start isEmpty. Operand 8885 states and 26404 transitions. [2021-02-19 17:25:15,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:15,178 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:15,178 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:15,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3278,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:15,384 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:15,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:15,385 INFO L82 PathProgramCache]: Analyzing trace with hash -883647784, now seen corresponding path program 270 times [2021-02-19 17:25:15,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:15,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216140376] [2021-02-19 17:25:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:15,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216140376] [2021-02-19 17:25:15,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683165953] [2021-02-19 17:25:15,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:15,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:25:15,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:15,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:15,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:15,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:15,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:25:15,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113321277] [2021-02-19 17:25:15,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:15,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:15,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:15,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:15,542 INFO L87 Difference]: Start difference. First operand 8885 states and 26404 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:15,776 INFO L93 Difference]: Finished difference Result 9493 states and 27625 transitions. [2021-02-19 17:25:15,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:25:15,777 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:15,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:15,786 INFO L225 Difference]: With dead ends: 9493 [2021-02-19 17:25:15,786 INFO L226 Difference]: Without dead ends: 9493 [2021-02-19 17:25:15,787 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:25:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9493 states. [2021-02-19 17:25:15,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9493 to 8878. [2021-02-19 17:25:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8878 states, 8877 states have (on average 2.9719499831023994) internal successors, (26382), 8877 states have internal predecessors, (26382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8878 states to 8878 states and 26382 transitions. [2021-02-19 17:25:15,885 INFO L78 Accepts]: Start accepts. Automaton has 8878 states and 26382 transitions. Word has length 22 [2021-02-19 17:25:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:15,886 INFO L480 AbstractCegarLoop]: Abstraction has 8878 states and 26382 transitions. [2021-02-19 17:25:15,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 8878 states and 26382 transitions. [2021-02-19 17:25:15,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:15,893 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:15,893 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:16,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3279,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:16,093 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:16,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1520114638, now seen corresponding path program 271 times [2021-02-19 17:25:16,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:16,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882320396] [2021-02-19 17:25:16,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:16,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882320396] [2021-02-19 17:25:16,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116787911] [2021-02-19 17:25:16,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:16,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:16,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:16,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:16,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:25:16,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456100218] [2021-02-19 17:25:16,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:16,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:16,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:16,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:16,255 INFO L87 Difference]: Start difference. First operand 8878 states and 26382 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:16,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:16,616 INFO L93 Difference]: Finished difference Result 10274 states and 29935 transitions. [2021-02-19 17:25:16,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:25:16,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:16,627 INFO L225 Difference]: With dead ends: 10274 [2021-02-19 17:25:16,627 INFO L226 Difference]: Without dead ends: 10274 [2021-02-19 17:25:16,627 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=551, Invalid=1089, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:25:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10274 states. [2021-02-19 17:25:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10274 to 9589. [2021-02-19 17:25:16,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9589 states, 9588 states have (on average 2.9740300375469335) internal successors, (28515), 9588 states have internal predecessors, (28515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9589 states to 9589 states and 28515 transitions. [2021-02-19 17:25:16,732 INFO L78 Accepts]: Start accepts. Automaton has 9589 states and 28515 transitions. Word has length 22 [2021-02-19 17:25:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:16,732 INFO L480 AbstractCegarLoop]: Abstraction has 9589 states and 28515 transitions. [2021-02-19 17:25:16,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 9589 states and 28515 transitions. [2021-02-19 17:25:16,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:16,739 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:16,739 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:16,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3280 [2021-02-19 17:25:16,939 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:16,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1217762326, now seen corresponding path program 272 times [2021-02-19 17:25:16,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:16,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415711947] [2021-02-19 17:25:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:17,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415711947] [2021-02-19 17:25:17,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095215395] [2021-02-19 17:25:17,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:17,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:17,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:17,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:17,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:17,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:17,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-02-19 17:25:17,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668125792] [2021-02-19 17:25:17,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:17,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:17,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:17,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:17,102 INFO L87 Difference]: Start difference. First operand 9589 states and 28515 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:17,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:17,396 INFO L93 Difference]: Finished difference Result 9935 states and 29000 transitions. [2021-02-19 17:25:17,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:25:17,397 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:17,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:17,407 INFO L225 Difference]: With dead ends: 9935 [2021-02-19 17:25:17,407 INFO L226 Difference]: Without dead ends: 9927 [2021-02-19 17:25:17,408 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:25:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9927 states. [2021-02-19 17:25:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9927 to 9539. [2021-02-19 17:25:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9539 states, 9538 states have (on average 2.970329209477878) internal successors, (28331), 9538 states have internal predecessors, (28331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9539 states to 9539 states and 28331 transitions. [2021-02-19 17:25:17,523 INFO L78 Accepts]: Start accepts. Automaton has 9539 states and 28331 transitions. Word has length 22 [2021-02-19 17:25:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:17,523 INFO L480 AbstractCegarLoop]: Abstraction has 9539 states and 28331 transitions. [2021-02-19 17:25:17,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 9539 states and 28331 transitions. [2021-02-19 17:25:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:17,530 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:17,530 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:17,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3281,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:17,730 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:17,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:17,730 INFO L82 PathProgramCache]: Analyzing trace with hash 879323178, now seen corresponding path program 273 times [2021-02-19 17:25:17,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:17,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502811211] [2021-02-19 17:25:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:17,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502811211] [2021-02-19 17:25:17,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169441759] [2021-02-19 17:25:17,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:17,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:25:17,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:17,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:17,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:17,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:17,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-02-19 17:25:17,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395459899] [2021-02-19 17:25:17,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:25:17,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:17,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:25:17,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:25:17,909 INFO L87 Difference]: Start difference. First operand 9539 states and 28331 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:18,333 INFO L93 Difference]: Finished difference Result 11945 states and 35172 transitions. [2021-02-19 17:25:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 17:25:18,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:18,349 INFO L225 Difference]: With dead ends: 11945 [2021-02-19 17:25:18,349 INFO L226 Difference]: Without dead ends: 11945 [2021-02-19 17:25:18,350 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=699, Invalid=1371, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 17:25:18,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11945 states. [2021-02-19 17:25:18,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11945 to 9292. [2021-02-19 17:25:18,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9292 states, 9291 states have (on average 2.9688946292110643) internal successors, (27584), 9291 states have internal predecessors, (27584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9292 states to 9292 states and 27584 transitions. [2021-02-19 17:25:18,487 INFO L78 Accepts]: Start accepts. Automaton has 9292 states and 27584 transitions. Word has length 22 [2021-02-19 17:25:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:18,487 INFO L480 AbstractCegarLoop]: Abstraction has 9292 states and 27584 transitions. [2021-02-19 17:25:18,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 9292 states and 27584 transitions. [2021-02-19 17:25:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:18,495 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:18,495 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:18,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3282,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:18,695 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:18,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:18,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1380611606, now seen corresponding path program 274 times [2021-02-19 17:25:18,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:18,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520126573] [2021-02-19 17:25:18,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:18,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520126573] [2021-02-19 17:25:18,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390127452] [2021-02-19 17:25:18,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:18,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:18,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:18,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:18,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:18,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:18,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-02-19 17:25:18,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484893809] [2021-02-19 17:25:18,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:18,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:18,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:18,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:18,848 INFO L87 Difference]: Start difference. First operand 9292 states and 27584 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:19,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:19,137 INFO L93 Difference]: Finished difference Result 9931 states and 29084 transitions. [2021-02-19 17:25:19,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:25:19,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:19,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:19,150 INFO L225 Difference]: With dead ends: 9931 [2021-02-19 17:25:19,151 INFO L226 Difference]: Without dead ends: 9931 [2021-02-19 17:25:19,151 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=401, Invalid=789, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:25:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9931 states. [2021-02-19 17:25:19,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9931 to 9375. [2021-02-19 17:25:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9375 states, 9374 states have (on average 2.9699167911243864) internal successors, (27840), 9374 states have internal predecessors, (27840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9375 states to 9375 states and 27840 transitions. [2021-02-19 17:25:19,331 INFO L78 Accepts]: Start accepts. Automaton has 9375 states and 27840 transitions. Word has length 22 [2021-02-19 17:25:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:19,331 INFO L480 AbstractCegarLoop]: Abstraction has 9375 states and 27840 transitions. [2021-02-19 17:25:19,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 9375 states and 27840 transitions. [2021-02-19 17:25:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:19,339 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:19,339 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:19,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3283 [2021-02-19 17:25:19,540 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:19,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:19,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1886957872, now seen corresponding path program 275 times [2021-02-19 17:25:19,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:19,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139230674] [2021-02-19 17:25:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:19,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139230674] [2021-02-19 17:25:19,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026049117] [2021-02-19 17:25:19,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:19,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:25:19,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:19,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:19,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:19,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:19,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-02-19 17:25:19,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073117347] [2021-02-19 17:25:19,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:19,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:19,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:19,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:19,714 INFO L87 Difference]: Start difference. First operand 9375 states and 27840 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:20,004 INFO L93 Difference]: Finished difference Result 9776 states and 28695 transitions. [2021-02-19 17:25:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:25:20,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:20,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:20,013 INFO L225 Difference]: With dead ends: 9776 [2021-02-19 17:25:20,014 INFO L226 Difference]: Without dead ends: 9776 [2021-02-19 17:25:20,014 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 17:25:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9776 states. [2021-02-19 17:25:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9776 to 8559. [2021-02-19 17:25:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8559 states, 8558 states have (on average 2.9644776817013323) internal successors, (25370), 8558 states have internal predecessors, (25370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8559 states to 8559 states and 25370 transitions. [2021-02-19 17:25:20,106 INFO L78 Accepts]: Start accepts. Automaton has 8559 states and 25370 transitions. Word has length 22 [2021-02-19 17:25:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:20,106 INFO L480 AbstractCegarLoop]: Abstraction has 8559 states and 25370 transitions. [2021-02-19 17:25:20,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 8559 states and 25370 transitions. [2021-02-19 17:25:20,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:20,112 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:20,112 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:20,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3284 [2021-02-19 17:25:20,313 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:20,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:20,313 INFO L82 PathProgramCache]: Analyzing trace with hash -403822934, now seen corresponding path program 276 times [2021-02-19 17:25:20,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:20,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601879241] [2021-02-19 17:25:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:20,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601879241] [2021-02-19 17:25:20,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481641024] [2021-02-19 17:25:20,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:20,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:25:20,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:20,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:20,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:20,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:20,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-02-19 17:25:20,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101689005] [2021-02-19 17:25:20,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:20,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:20,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:20,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:20,482 INFO L87 Difference]: Start difference. First operand 8559 states and 25370 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:20,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:20,753 INFO L93 Difference]: Finished difference Result 9477 states and 27623 transitions. [2021-02-19 17:25:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:25:20,754 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:20,766 INFO L225 Difference]: With dead ends: 9477 [2021-02-19 17:25:20,766 INFO L226 Difference]: Without dead ends: 9477 [2021-02-19 17:25:20,766 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:25:20,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-02-19 17:25:20,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 8988. [2021-02-19 17:25:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8988 states, 8987 states have (on average 2.963057750083454) internal successors, (26629), 8987 states have internal predecessors, (26629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:20,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8988 states to 8988 states and 26629 transitions. [2021-02-19 17:25:20,886 INFO L78 Accepts]: Start accepts. Automaton has 8988 states and 26629 transitions. Word has length 22 [2021-02-19 17:25:20,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:20,886 INFO L480 AbstractCegarLoop]: Abstraction has 8988 states and 26629 transitions. [2021-02-19 17:25:20,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 8988 states and 26629 transitions. [2021-02-19 17:25:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:20,894 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:20,894 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:21,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3285 [2021-02-19 17:25:21,098 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:21,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:21,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1671280112, now seen corresponding path program 277 times [2021-02-19 17:25:21,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:21,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145833777] [2021-02-19 17:25:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:21,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145833777] [2021-02-19 17:25:21,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659726020] [2021-02-19 17:25:21,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:21,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:21,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:21,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:21,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-02-19 17:25:21,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694266532] [2021-02-19 17:25:21,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:25:21,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:21,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:25:21,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:25:21,276 INFO L87 Difference]: Start difference. First operand 8988 states and 26629 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:21,670 INFO L93 Difference]: Finished difference Result 9586 states and 27870 transitions. [2021-02-19 17:25:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:25:21,671 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:21,683 INFO L225 Difference]: With dead ends: 9586 [2021-02-19 17:25:21,683 INFO L226 Difference]: Without dead ends: 9586 [2021-02-19 17:25:21,684 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 17:25:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9586 states. [2021-02-19 17:25:21,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9586 to 8758. [2021-02-19 17:25:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8758 states, 8757 states have (on average 2.961630695443645) internal successors, (25935), 8757 states have internal predecessors, (25935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:21,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8758 states to 8758 states and 25935 transitions. [2021-02-19 17:25:21,785 INFO L78 Accepts]: Start accepts. Automaton has 8758 states and 25935 transitions. Word has length 22 [2021-02-19 17:25:21,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:21,785 INFO L480 AbstractCegarLoop]: Abstraction has 8758 states and 25935 transitions. [2021-02-19 17:25:21,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:21,785 INFO L276 IsEmpty]: Start isEmpty. Operand 8758 states and 25935 transitions. [2021-02-19 17:25:21,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:21,791 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:21,791 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:21,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3286,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:21,992 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:21,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:21,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1987220330, now seen corresponding path program 278 times [2021-02-19 17:25:21,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:21,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644873747] [2021-02-19 17:25:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:22,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644873747] [2021-02-19 17:25:22,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960189406] [2021-02-19 17:25:22,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:22,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:22,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:22,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:22,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:22,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:22,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-02-19 17:25:22,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952103678] [2021-02-19 17:25:22,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:25:22,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:22,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:25:22,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:25:22,175 INFO L87 Difference]: Start difference. First operand 8758 states and 25935 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:22,633 INFO L93 Difference]: Finished difference Result 9710 states and 28182 transitions. [2021-02-19 17:25:22,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 17:25:22,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:22,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:22,642 INFO L225 Difference]: With dead ends: 9710 [2021-02-19 17:25:22,642 INFO L226 Difference]: Without dead ends: 9710 [2021-02-19 17:25:22,643 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=708, Invalid=1454, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 17:25:22,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9710 states. [2021-02-19 17:25:22,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9710 to 8583. [2021-02-19 17:25:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8583 states, 8582 states have (on average 2.9670240037287345) internal successors, (25463), 8582 states have internal predecessors, (25463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8583 states to 8583 states and 25463 transitions. [2021-02-19 17:25:22,729 INFO L78 Accepts]: Start accepts. Automaton has 8583 states and 25463 transitions. Word has length 22 [2021-02-19 17:25:22,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:22,729 INFO L480 AbstractCegarLoop]: Abstraction has 8583 states and 25463 transitions. [2021-02-19 17:25:22,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:22,729 INFO L276 IsEmpty]: Start isEmpty. Operand 8583 states and 25463 transitions. [2021-02-19 17:25:22,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:22,735 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:22,735 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:22,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3287 [2021-02-19 17:25:22,935 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:22,935 INFO L82 PathProgramCache]: Analyzing trace with hash -397556954, now seen corresponding path program 279 times [2021-02-19 17:25:22,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:22,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553995711] [2021-02-19 17:25:22,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:23,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553995711] [2021-02-19 17:25:23,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184591722] [2021-02-19 17:25:23,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:23,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:25:23,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:23,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:23,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:23,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:23,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-02-19 17:25:23,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408190399] [2021-02-19 17:25:23,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:23,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:23,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:23,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:23,116 INFO L87 Difference]: Start difference. First operand 8583 states and 25463 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:23,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:23,365 INFO L93 Difference]: Finished difference Result 8856 states and 25817 transitions. [2021-02-19 17:25:23,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:25:23,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:23,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:23,374 INFO L225 Difference]: With dead ends: 8856 [2021-02-19 17:25:23,374 INFO L226 Difference]: Without dead ends: 8850 [2021-02-19 17:25:23,374 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:25:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8850 states. [2021-02-19 17:25:23,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8850 to 8581. [2021-02-19 17:25:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8581 states, 8580 states have (on average 2.9657342657342656) internal successors, (25446), 8580 states have internal predecessors, (25446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 25446 transitions. [2021-02-19 17:25:23,486 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 25446 transitions. Word has length 22 [2021-02-19 17:25:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:23,486 INFO L480 AbstractCegarLoop]: Abstraction has 8581 states and 25446 transitions. [2021-02-19 17:25:23,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:23,486 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 25446 transitions. [2021-02-19 17:25:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:23,494 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:23,494 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:23,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3288,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:23,702 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:23,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:23,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1134965508, now seen corresponding path program 280 times [2021-02-19 17:25:23,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:23,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340673635] [2021-02-19 17:25:23,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:23,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340673635] [2021-02-19 17:25:23,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529612642] [2021-02-19 17:25:23,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:23,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:23,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:23,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:23,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:23,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-02-19 17:25:23,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752820448] [2021-02-19 17:25:23,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:25:23,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:23,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:25:23,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:25:23,876 INFO L87 Difference]: Start difference. First operand 8581 states and 25446 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:24,117 INFO L93 Difference]: Finished difference Result 9940 states and 29170 transitions. [2021-02-19 17:25:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:25:24,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:24,130 INFO L225 Difference]: With dead ends: 9940 [2021-02-19 17:25:24,130 INFO L226 Difference]: Without dead ends: 9940 [2021-02-19 17:25:24,130 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:25:24,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9940 states. [2021-02-19 17:25:24,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9940 to 9701. [2021-02-19 17:25:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9701 states, 9700 states have (on average 2.9671134020618557) internal successors, (28781), 9700 states have internal predecessors, (28781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9701 states to 9701 states and 28781 transitions. [2021-02-19 17:25:24,252 INFO L78 Accepts]: Start accepts. Automaton has 9701 states and 28781 transitions. Word has length 22 [2021-02-19 17:25:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:24,252 INFO L480 AbstractCegarLoop]: Abstraction has 9701 states and 28781 transitions. [2021-02-19 17:25:24,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 9701 states and 28781 transitions. [2021-02-19 17:25:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:24,260 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:24,260 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:24,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3289,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:24,461 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash -132491670, now seen corresponding path program 281 times [2021-02-19 17:25:24,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:24,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036049363] [2021-02-19 17:25:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:24,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036049363] [2021-02-19 17:25:24,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672936183] [2021-02-19 17:25:24,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:24,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:25:24,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:24,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:24,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:24,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:24,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-02-19 17:25:24,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456451502] [2021-02-19 17:25:24,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:25:24,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:24,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:25:24,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:25:24,669 INFO L87 Difference]: Start difference. First operand 9701 states and 28781 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:25,028 INFO L93 Difference]: Finished difference Result 10036 states and 29374 transitions. [2021-02-19 17:25:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:25:25,029 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:25,039 INFO L225 Difference]: With dead ends: 10036 [2021-02-19 17:25:25,039 INFO L226 Difference]: Without dead ends: 10036 [2021-02-19 17:25:25,039 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=548, Invalid=1174, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 17:25:25,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10036 states. [2021-02-19 17:25:25,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10036 to 9711. [2021-02-19 17:25:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9711 states, 9710 states have (on average 2.967147270854789) internal successors, (28811), 9710 states have internal predecessors, (28811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9711 states to 9711 states and 28811 transitions. [2021-02-19 17:25:25,157 INFO L78 Accepts]: Start accepts. Automaton has 9711 states and 28811 transitions. Word has length 22 [2021-02-19 17:25:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:25,157 INFO L480 AbstractCegarLoop]: Abstraction has 9711 states and 28811 transitions. [2021-02-19 17:25:25,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:25,157 INFO L276 IsEmpty]: Start isEmpty. Operand 9711 states and 28811 transitions. [2021-02-19 17:25:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:25,165 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:25,165 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:25,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3290 [2021-02-19 17:25:25,366 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:25,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:25,366 INFO L82 PathProgramCache]: Analyzing trace with hash -768958524, now seen corresponding path program 282 times [2021-02-19 17:25:25,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:25,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153585085] [2021-02-19 17:25:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:25,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153585085] [2021-02-19 17:25:25,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760077672] [2021-02-19 17:25:25,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:25,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:25:25,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:25,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:25,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:25,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:25,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-02-19 17:25:25,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83507764] [2021-02-19 17:25:25,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:25:25,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:25,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:25:25,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:25:25,568 INFO L87 Difference]: Start difference. First operand 9711 states and 28811 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:26,119 INFO L93 Difference]: Finished difference Result 11354 states and 33233 transitions. [2021-02-19 17:25:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 17:25:26,120 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:26,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:26,134 INFO L225 Difference]: With dead ends: 11354 [2021-02-19 17:25:26,134 INFO L226 Difference]: Without dead ends: 11354 [2021-02-19 17:25:26,134 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1404, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 17:25:26,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11354 states. [2021-02-19 17:25:26,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11354 to 10729. [2021-02-19 17:25:26,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10729 states, 10728 states have (on average 2.9696122296793437) internal successors, (31858), 10728 states have internal predecessors, (31858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10729 states to 10729 states and 31858 transitions. [2021-02-19 17:25:26,275 INFO L78 Accepts]: Start accepts. Automaton has 10729 states and 31858 transitions. Word has length 22 [2021-02-19 17:25:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:26,275 INFO L480 AbstractCegarLoop]: Abstraction has 10729 states and 31858 transitions. [2021-02-19 17:25:26,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 10729 states and 31858 transitions. [2021-02-19 17:25:26,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:26,283 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:26,284 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:26,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3291,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:26,484 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:26,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1984205930, now seen corresponding path program 283 times [2021-02-19 17:25:26,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:26,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432800910] [2021-02-19 17:25:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:26,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432800910] [2021-02-19 17:25:26,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645270322] [2021-02-19 17:25:26,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:26,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:26,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:26,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:26,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-02-19 17:25:26,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840212345] [2021-02-19 17:25:26,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:26,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:26,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:26,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:26,647 INFO L87 Difference]: Start difference. First operand 10729 states and 31858 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:26,882 INFO L93 Difference]: Finished difference Result 10928 states and 32096 transitions. [2021-02-19 17:25:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:25:26,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:26,893 INFO L225 Difference]: With dead ends: 10928 [2021-02-19 17:25:26,893 INFO L226 Difference]: Without dead ends: 10924 [2021-02-19 17:25:26,893 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:25:26,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10924 states. [2021-02-19 17:25:26,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10924 to 10729. [2021-02-19 17:25:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10729 states, 10728 states have (on average 2.969332587621178) internal successors, (31855), 10728 states have internal predecessors, (31855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10729 states to 10729 states and 31855 transitions. [2021-02-19 17:25:27,017 INFO L78 Accepts]: Start accepts. Automaton has 10729 states and 31855 transitions. Word has length 22 [2021-02-19 17:25:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:27,017 INFO L480 AbstractCegarLoop]: Abstraction has 10729 states and 31855 transitions. [2021-02-19 17:25:27,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10729 states and 31855 transitions. [2021-02-19 17:25:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:27,025 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:27,026 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:27,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3292 [2021-02-19 17:25:27,226 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:27,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:27,226 INFO L82 PathProgramCache]: Analyzing trace with hash 527605802, now seen corresponding path program 284 times [2021-02-19 17:25:27,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:27,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483492300] [2021-02-19 17:25:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:27,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483492300] [2021-02-19 17:25:27,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859749188] [2021-02-19 17:25:27,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:27,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:27,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:27,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:27,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:27,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:27,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-02-19 17:25:27,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771695986] [2021-02-19 17:25:27,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:25:27,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:27,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:25:27,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:25:27,427 INFO L87 Difference]: Start difference. First operand 10729 states and 31855 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:27,834 INFO L93 Difference]: Finished difference Result 13095 states and 38517 transitions. [2021-02-19 17:25:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:25:27,835 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:27,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:27,852 INFO L225 Difference]: With dead ends: 13095 [2021-02-19 17:25:27,852 INFO L226 Difference]: Without dead ends: 13095 [2021-02-19 17:25:27,852 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=549, Invalid=1257, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 17:25:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2021-02-19 17:25:27,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 12381. [2021-02-19 17:25:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12381 states, 12380 states have (on average 2.972940226171244) internal successors, (36805), 12380 states have internal predecessors, (36805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12381 states to 12381 states and 36805 transitions. [2021-02-19 17:25:28,028 INFO L78 Accepts]: Start accepts. Automaton has 12381 states and 36805 transitions. Word has length 22 [2021-02-19 17:25:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:28,028 INFO L480 AbstractCegarLoop]: Abstraction has 12381 states and 36805 transitions. [2021-02-19 17:25:28,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 12381 states and 36805 transitions. [2021-02-19 17:25:28,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:28,038 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:28,038 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:28,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3293 [2021-02-19 17:25:28,238 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:28,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:28,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1229752998, now seen corresponding path program 285 times [2021-02-19 17:25:28,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:28,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746913471] [2021-02-19 17:25:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:28,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746913471] [2021-02-19 17:25:28,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260092864] [2021-02-19 17:25:28,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:28,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:25:28,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:28,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:28,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:28,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:28,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 16 [2021-02-19 17:25:28,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122412908] [2021-02-19 17:25:28,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:28,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:28,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:28,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:28,431 INFO L87 Difference]: Start difference. First operand 12381 states and 36805 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:28,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:28,724 INFO L93 Difference]: Finished difference Result 12586 states and 37076 transitions. [2021-02-19 17:25:28,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:25:28,725 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:28,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:28,738 INFO L225 Difference]: With dead ends: 12586 [2021-02-19 17:25:28,739 INFO L226 Difference]: Without dead ends: 12584 [2021-02-19 17:25:28,739 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:25:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12584 states. [2021-02-19 17:25:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12584 to 12401. [2021-02-19 17:25:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12401 states, 12400 states have (on average 2.973306451612903) internal successors, (36869), 12400 states have internal predecessors, (36869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12401 states to 12401 states and 36869 transitions. [2021-02-19 17:25:28,905 INFO L78 Accepts]: Start accepts. Automaton has 12401 states and 36869 transitions. Word has length 22 [2021-02-19 17:25:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:28,905 INFO L480 AbstractCegarLoop]: Abstraction has 12401 states and 36869 transitions. [2021-02-19 17:25:28,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:28,905 INFO L276 IsEmpty]: Start isEmpty. Operand 12401 states and 36869 transitions. [2021-02-19 17:25:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:28,914 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:28,914 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:29,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3294,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:29,115 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:29,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1347465238, now seen corresponding path program 286 times [2021-02-19 17:25:29,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:29,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85530541] [2021-02-19 17:25:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:29,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85530541] [2021-02-19 17:25:29,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055886458] [2021-02-19 17:25:29,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:29,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:29,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:29,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:29,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:29,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:29,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 16 [2021-02-19 17:25:29,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104347175] [2021-02-19 17:25:29,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:29,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:29,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:29,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:29,291 INFO L87 Difference]: Start difference. First operand 12401 states and 36869 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:29,492 INFO L93 Difference]: Finished difference Result 12966 states and 38155 transitions. [2021-02-19 17:25:29,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:25:29,492 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:29,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:29,506 INFO L225 Difference]: With dead ends: 12966 [2021-02-19 17:25:29,506 INFO L226 Difference]: Without dead ends: 12966 [2021-02-19 17:25:29,506 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:25:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12966 states. [2021-02-19 17:25:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12966 to 12402. [2021-02-19 17:25:29,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12402 states, 12401 states have (on average 2.9731473268284816) internal successors, (36870), 12401 states have internal predecessors, (36870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12402 states to 12402 states and 36870 transitions. [2021-02-19 17:25:29,666 INFO L78 Accepts]: Start accepts. Automaton has 12402 states and 36870 transitions. Word has length 22 [2021-02-19 17:25:29,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:29,666 INFO L480 AbstractCegarLoop]: Abstraction has 12402 states and 36870 transitions. [2021-02-19 17:25:29,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:29,666 INFO L276 IsEmpty]: Start isEmpty. Operand 12402 states and 36870 transitions. [2021-02-19 17:25:29,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:29,675 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:29,675 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:29,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3295 [2021-02-19 17:25:29,876 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:29,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1218454724, now seen corresponding path program 287 times [2021-02-19 17:25:29,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:29,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737832910] [2021-02-19 17:25:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:29,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737832910] [2021-02-19 17:25:29,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500058023] [2021-02-19 17:25:29,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:29,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:25:29,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:29,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:29,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:30,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:30,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2021-02-19 17:25:30,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67060905] [2021-02-19 17:25:30,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:25:30,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:30,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:25:30,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:25:30,066 INFO L87 Difference]: Start difference. First operand 12402 states and 36870 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:30,336 INFO L93 Difference]: Finished difference Result 13354 states and 39229 transitions. [2021-02-19 17:25:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:25:30,337 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:30,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:30,354 INFO L225 Difference]: With dead ends: 13354 [2021-02-19 17:25:30,354 INFO L226 Difference]: Without dead ends: 13354 [2021-02-19 17:25:30,355 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=375, Invalid=815, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:25:30,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13354 states. [2021-02-19 17:25:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13354 to 12406. [2021-02-19 17:25:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12406 states, 12405 states have (on average 2.9729947601773477) internal successors, (36880), 12405 states have internal predecessors, (36880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12406 states to 12406 states and 36880 transitions. [2021-02-19 17:25:30,530 INFO L78 Accepts]: Start accepts. Automaton has 12406 states and 36880 transitions. Word has length 22 [2021-02-19 17:25:30,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:30,530 INFO L480 AbstractCegarLoop]: Abstraction has 12406 states and 36880 transitions. [2021-02-19 17:25:30,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 12406 states and 36880 transitions. [2021-02-19 17:25:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:30,540 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:30,540 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:30,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3296,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:30,741 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:30,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:30,741 INFO L82 PathProgramCache]: Analyzing trace with hash -842405078, now seen corresponding path program 288 times [2021-02-19 17:25:30,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:30,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259849210] [2021-02-19 17:25:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:30,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259849210] [2021-02-19 17:25:30,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41899185] [2021-02-19 17:25:30,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:30,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:25:30,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:30,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:30,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:30,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:30,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2021-02-19 17:25:30,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828460179] [2021-02-19 17:25:30,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:25:30,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:30,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:25:30,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:25:30,962 INFO L87 Difference]: Start difference. First operand 12406 states and 36880 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:31,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:31,310 INFO L93 Difference]: Finished difference Result 15011 states and 44022 transitions. [2021-02-19 17:25:31,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:25:31,310 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:31,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:31,330 INFO L225 Difference]: With dead ends: 15011 [2021-02-19 17:25:31,330 INFO L226 Difference]: Without dead ends: 15011 [2021-02-19 17:25:31,331 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=471, Invalid=1089, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 17:25:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15011 states. [2021-02-19 17:25:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15011 to 13687. [2021-02-19 17:25:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13687 states, 13686 states have (on average 2.976983779044279) internal successors, (40743), 13686 states have internal predecessors, (40743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13687 states to 13687 states and 40743 transitions. [2021-02-19 17:25:31,536 INFO L78 Accepts]: Start accepts. Automaton has 13687 states and 40743 transitions. Word has length 22 [2021-02-19 17:25:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:31,536 INFO L480 AbstractCegarLoop]: Abstraction has 13687 states and 40743 transitions. [2021-02-19 17:25:31,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 13687 states and 40743 transitions. [2021-02-19 17:25:31,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:31,547 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:31,547 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:31,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-02-19 17:25:31,747 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:31,748 INFO L82 PathProgramCache]: Analyzing trace with hash -304549500, now seen corresponding path program 289 times [2021-02-19 17:25:31,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:31,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503319882] [2021-02-19 17:25:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:31,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503319882] [2021-02-19 17:25:31,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570981167] [2021-02-19 17:25:31,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:31,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:31,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:31,943 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:31,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:31,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2021-02-19 17:25:31,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465675090] [2021-02-19 17:25:31,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:25:31,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:31,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:25:31,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:25:31,943 INFO L87 Difference]: Start difference. First operand 13687 states and 40743 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:32,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:32,313 INFO L93 Difference]: Finished difference Result 14939 states and 43823 transitions. [2021-02-19 17:25:32,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:25:32,314 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:32,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:32,330 INFO L225 Difference]: With dead ends: 14939 [2021-02-19 17:25:32,330 INFO L226 Difference]: Without dead ends: 14939 [2021-02-19 17:25:32,331 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=523, Invalid=1199, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 17:25:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14939 states. [2021-02-19 17:25:32,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14939 to 13709. [2021-02-19 17:25:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13709 states, 13708 states have (on average 2.976947767726875) internal successors, (40808), 13708 states have internal predecessors, (40808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13709 states to 13709 states and 40808 transitions. [2021-02-19 17:25:32,524 INFO L78 Accepts]: Start accepts. Automaton has 13709 states and 40808 transitions. Word has length 22 [2021-02-19 17:25:32,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:32,524 INFO L480 AbstractCegarLoop]: Abstraction has 13709 states and 40808 transitions. [2021-02-19 17:25:32,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:32,524 INFO L276 IsEmpty]: Start isEmpty. Operand 13709 states and 40808 transitions. [2021-02-19 17:25:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:32,535 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:32,535 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:32,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3298 [2021-02-19 17:25:32,736 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:32,736 INFO L82 PathProgramCache]: Analyzing trace with hash -810895766, now seen corresponding path program 290 times [2021-02-19 17:25:32,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:32,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367759215] [2021-02-19 17:25:32,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:32,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367759215] [2021-02-19 17:25:32,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862942865] [2021-02-19 17:25:32,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:32,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:32,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:32,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:32,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:32,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:32,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2021-02-19 17:25:32,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788967045] [2021-02-19 17:25:32,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:25:32,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:32,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:25:32,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:25:32,937 INFO L87 Difference]: Start difference. First operand 13709 states and 40808 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:33,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:33,315 INFO L93 Difference]: Finished difference Result 17181 states and 50741 transitions. [2021-02-19 17:25:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:25:33,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:33,338 INFO L225 Difference]: With dead ends: 17181 [2021-02-19 17:25:33,338 INFO L226 Difference]: Without dead ends: 17181 [2021-02-19 17:25:33,339 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=518, Invalid=1204, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 17:25:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17181 states. [2021-02-19 17:25:33,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17181 to 16350. [2021-02-19 17:25:33,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16350 states, 16349 states have (on average 2.9809162639916815) internal successors, (48735), 16349 states have internal predecessors, (48735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16350 states to 16350 states and 48735 transitions. [2021-02-19 17:25:33,553 INFO L78 Accepts]: Start accepts. Automaton has 16350 states and 48735 transitions. Word has length 22 [2021-02-19 17:25:33,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:33,553 INFO L480 AbstractCegarLoop]: Abstraction has 16350 states and 48735 transitions. [2021-02-19 17:25:33,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 16350 states and 48735 transitions. [2021-02-19 17:25:33,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:33,564 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:33,564 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:33,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3299,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:33,764 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:33,764 INFO L82 PathProgramCache]: Analyzing trace with hash 672239172, now seen corresponding path program 291 times [2021-02-19 17:25:33,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:33,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179647731] [2021-02-19 17:25:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:33,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179647731] [2021-02-19 17:25:33,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999753670] [2021-02-19 17:25:33,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:33,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:25:33,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:33,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:33,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:33,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:33,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2021-02-19 17:25:33,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844615417] [2021-02-19 17:25:33,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:25:33,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:33,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:25:33,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:25:33,969 INFO L87 Difference]: Start difference. First operand 16350 states and 48735 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:34,333 INFO L93 Difference]: Finished difference Result 16994 states and 50248 transitions. [2021-02-19 17:25:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:25:34,334 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:34,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:34,356 INFO L225 Difference]: With dead ends: 16994 [2021-02-19 17:25:34,356 INFO L226 Difference]: Without dead ends: 16994 [2021-02-19 17:25:34,357 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=1101, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 17:25:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16994 states. [2021-02-19 17:25:34,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16994 to 16291. [2021-02-19 17:25:34,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16291 states, 16290 states have (on average 2.9807243707796194) internal successors, (48556), 16290 states have internal predecessors, (48556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16291 states to 16291 states and 48556 transitions. [2021-02-19 17:25:34,579 INFO L78 Accepts]: Start accepts. Automaton has 16291 states and 48556 transitions. Word has length 22 [2021-02-19 17:25:34,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:34,580 INFO L480 AbstractCegarLoop]: Abstraction has 16291 states and 48556 transitions. [2021-02-19 17:25:34,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:34,580 INFO L276 IsEmpty]: Start isEmpty. Operand 16291 states and 48556 transitions. [2021-02-19 17:25:34,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:34,590 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:34,590 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:34,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3300,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:34,791 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:34,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash -595218006, now seen corresponding path program 292 times [2021-02-19 17:25:34,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:34,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871123219] [2021-02-19 17:25:34,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:34,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871123219] [2021-02-19 17:25:34,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466761121] [2021-02-19 17:25:34,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:34,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:34,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:34,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:34,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:35,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:35,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2021-02-19 17:25:35,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742342175] [2021-02-19 17:25:35,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:25:35,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:35,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:25:35,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:25:35,005 INFO L87 Difference]: Start difference. First operand 16291 states and 48556 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:35,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:35,337 INFO L93 Difference]: Finished difference Result 18131 states and 53754 transitions. [2021-02-19 17:25:35,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:25:35,337 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:35,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:35,360 INFO L225 Difference]: With dead ends: 18131 [2021-02-19 17:25:35,361 INFO L226 Difference]: Without dead ends: 18131 [2021-02-19 17:25:35,361 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=427, Invalid=1055, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:25:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18131 states. [2021-02-19 17:25:35,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18131 to 17622. [2021-02-19 17:25:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17622 states, 17621 states have (on average 2.9827478576698256) internal successors, (52559), 17621 states have internal predecessors, (52559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17622 states to 17622 states and 52559 transitions. [2021-02-19 17:25:35,582 INFO L78 Accepts]: Start accepts. Automaton has 17622 states and 52559 transitions. Word has length 22 [2021-02-19 17:25:35,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:35,582 INFO L480 AbstractCegarLoop]: Abstraction has 17622 states and 52559 transitions. [2021-02-19 17:25:35,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 17622 states and 52559 transitions. [2021-02-19 17:25:35,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:35,598 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:35,598 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:35,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3301,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:35,798 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:35,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:35,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1231684860, now seen corresponding path program 293 times [2021-02-19 17:25:35,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:35,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085080227] [2021-02-19 17:25:35,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:35,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085080227] [2021-02-19 17:25:35,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710895415] [2021-02-19 17:25:35,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:35,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:25:35,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:35,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:35,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:36,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:36,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-02-19 17:25:36,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436493607] [2021-02-19 17:25:36,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:25:36,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:36,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:25:36,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:25:36,018 INFO L87 Difference]: Start difference. First operand 17622 states and 52559 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:36,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:36,384 INFO L93 Difference]: Finished difference Result 18277 states and 54183 transitions. [2021-02-19 17:25:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:25:36,385 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:36,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:36,409 INFO L225 Difference]: With dead ends: 18277 [2021-02-19 17:25:36,409 INFO L226 Difference]: Without dead ends: 18277 [2021-02-19 17:25:36,410 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:25:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18277 states. [2021-02-19 17:25:36,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18277 to 17632. [2021-02-19 17:25:36,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17632 states, 17631 states have (on average 2.9827009245079688) internal successors, (52588), 17631 states have internal predecessors, (52588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:36,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17632 states to 17632 states and 52588 transitions. [2021-02-19 17:25:36,691 INFO L78 Accepts]: Start accepts. Automaton has 17632 states and 52588 transitions. Word has length 22 [2021-02-19 17:25:36,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:36,691 INFO L480 AbstractCegarLoop]: Abstraction has 17632 states and 52588 transitions. [2021-02-19 17:25:36,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 17632 states and 52588 transitions. [2021-02-19 17:25:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 17:25:36,703 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:36,703 INFO L506 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:36,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3302,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:36,904 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:36,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:36,904 INFO L82 PathProgramCache]: Analyzing trace with hash 512679146, now seen corresponding path program 294 times [2021-02-19 17:25:36,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:36,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342708659] [2021-02-19 17:25:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:37,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342708659] [2021-02-19 17:25:37,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788243931] [2021-02-19 17:25:37,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:37,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:25:37,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:37,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:37,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:37,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:37,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-02-19 17:25:37,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597905375] [2021-02-19 17:25:37,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:25:37,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:37,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:25:37,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:25:37,138 INFO L87 Difference]: Start difference. First operand 17632 states and 52588 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:37,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:37,678 INFO L93 Difference]: Finished difference Result 19551 states and 57980 transitions. [2021-02-19 17:25:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 17:25:37,678 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-02-19 17:25:37,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:37,705 INFO L225 Difference]: With dead ends: 19551 [2021-02-19 17:25:37,705 INFO L226 Difference]: Without dead ends: 19551 [2021-02-19 17:25:37,706 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=858, Invalid=2004, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 17:25:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19551 states. [2021-02-19 17:25:37,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19551 to 17816. [2021-02-19 17:25:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17816 states, 17815 states have (on average 2.9829357283188322) internal successors, (53141), 17815 states have internal predecessors, (53141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17816 states to 17816 states and 53141 transitions. [2021-02-19 17:25:37,978 INFO L78 Accepts]: Start accepts. Automaton has 17816 states and 53141 transitions. Word has length 22 [2021-02-19 17:25:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:37,978 INFO L480 AbstractCegarLoop]: Abstraction has 17816 states and 53141 transitions. [2021-02-19 17:25:37,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:37,978 INFO L276 IsEmpty]: Start isEmpty. Operand 17816 states and 53141 transitions. [2021-02-19 17:25:37,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:37,993 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:37,993 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:38,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:38,193 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:38,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:38,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1446675471, now seen corresponding path program 295 times [2021-02-19 17:25:38,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:38,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263389780] [2021-02-19 17:25:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:38,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263389780] [2021-02-19 17:25:38,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465738677] [2021-02-19 17:25:38,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:38,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:38,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:38,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:38,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-02-19 17:25:38,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416121734] [2021-02-19 17:25:38,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:25:38,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:38,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:25:38,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:25:38,338 INFO L87 Difference]: Start difference. First operand 17816 states and 53141 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:38,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:38,623 INFO L93 Difference]: Finished difference Result 18042 states and 53460 transitions. [2021-02-19 17:25:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:25:38,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:38,647 INFO L225 Difference]: With dead ends: 18042 [2021-02-19 17:25:38,647 INFO L226 Difference]: Without dead ends: 18039 [2021-02-19 17:25:38,647 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:25:38,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18039 states. [2021-02-19 17:25:38,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18039 to 17792. [2021-02-19 17:25:38,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17792 states, 17791 states have (on average 2.982463043111686) internal successors, (53061), 17791 states have internal predecessors, (53061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17792 states to 17792 states and 53061 transitions. [2021-02-19 17:25:38,981 INFO L78 Accepts]: Start accepts. Automaton has 17792 states and 53061 transitions. Word has length 23 [2021-02-19 17:25:38,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:38,981 INFO L480 AbstractCegarLoop]: Abstraction has 17792 states and 53061 transitions. [2021-02-19 17:25:38,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:38,981 INFO L276 IsEmpty]: Start isEmpty. Operand 17792 states and 53061 transitions. [2021-02-19 17:25:38,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:38,995 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:38,995 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:39,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3304 [2021-02-19 17:25:39,195 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:39,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:39,195 INFO L82 PathProgramCache]: Analyzing trace with hash 42729525, now seen corresponding path program 296 times [2021-02-19 17:25:39,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:39,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403866175] [2021-02-19 17:25:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:39,271 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:39,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403866175] [2021-02-19 17:25:39,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138265096] [2021-02-19 17:25:39,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:39,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:39,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:39,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:39,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:39,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:39,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-02-19 17:25:39,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213566548] [2021-02-19 17:25:39,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:39,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:39,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:39,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:39,333 INFO L87 Difference]: Start difference. First operand 17792 states and 53061 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:39,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:39,584 INFO L93 Difference]: Finished difference Result 18017 states and 53382 transitions. [2021-02-19 17:25:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:25:39,584 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:39,605 INFO L225 Difference]: With dead ends: 18017 [2021-02-19 17:25:39,605 INFO L226 Difference]: Without dead ends: 18013 [2021-02-19 17:25:39,606 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:25:39,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18013 states. [2021-02-19 17:25:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18013 to 17792. [2021-02-19 17:25:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17792 states, 17791 states have (on average 2.981957169355292) internal successors, (53052), 17791 states have internal predecessors, (53052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:39,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17792 states to 17792 states and 53052 transitions. [2021-02-19 17:25:39,840 INFO L78 Accepts]: Start accepts. Automaton has 17792 states and 53052 transitions. Word has length 23 [2021-02-19 17:25:39,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:39,840 INFO L480 AbstractCegarLoop]: Abstraction has 17792 states and 53052 transitions. [2021-02-19 17:25:39,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:39,840 INFO L276 IsEmpty]: Start isEmpty. Operand 17792 states and 53052 transitions. [2021-02-19 17:25:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:39,854 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:39,854 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:40,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3305,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:40,055 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:40,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1030355855, now seen corresponding path program 297 times [2021-02-19 17:25:40,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:40,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105233139] [2021-02-19 17:25:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:40,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105233139] [2021-02-19 17:25:40,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782911297] [2021-02-19 17:25:40,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:40,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:25:40,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:40,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:25:40,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:40,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:40,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:25:40,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357640143] [2021-02-19 17:25:40,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:40,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:40,198 INFO L87 Difference]: Start difference. First operand 17792 states and 53052 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:40,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:40,414 INFO L93 Difference]: Finished difference Result 18098 states and 53714 transitions. [2021-02-19 17:25:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:25:40,415 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:40,437 INFO L225 Difference]: With dead ends: 18098 [2021-02-19 17:25:40,438 INFO L226 Difference]: Without dead ends: 18092 [2021-02-19 17:25:40,438 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:25:40,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18092 states. [2021-02-19 17:25:40,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18092 to 17795. [2021-02-19 17:25:40,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17795 states, 17794 states have (on average 2.9817354164325054) internal successors, (53057), 17794 states have internal predecessors, (53057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17795 states to 17795 states and 53057 transitions. [2021-02-19 17:25:40,656 INFO L78 Accepts]: Start accepts. Automaton has 17795 states and 53057 transitions. Word has length 23 [2021-02-19 17:25:40,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:40,657 INFO L480 AbstractCegarLoop]: Abstraction has 17795 states and 53057 transitions. [2021-02-19 17:25:40,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 17795 states and 53057 transitions. [2021-02-19 17:25:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:40,672 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:40,672 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:40,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3306,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:40,872 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:40,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:40,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1863351401, now seen corresponding path program 298 times [2021-02-19 17:25:40,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:40,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702350713] [2021-02-19 17:25:40,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:40,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702350713] [2021-02-19 17:25:40,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841791758] [2021-02-19 17:25:40,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:40,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:40,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:40,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:40,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:41,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:41,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-02-19 17:25:41,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153453694] [2021-02-19 17:25:41,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:41,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:41,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:41,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:41,009 INFO L87 Difference]: Start difference. First operand 17795 states and 53057 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:41,219 INFO L93 Difference]: Finished difference Result 17957 states and 53327 transitions. [2021-02-19 17:25:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:25:41,219 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:41,242 INFO L225 Difference]: With dead ends: 17957 [2021-02-19 17:25:41,242 INFO L226 Difference]: Without dead ends: 17948 [2021-02-19 17:25:41,242 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:25:41,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17948 states. [2021-02-19 17:25:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17948 to 17782. [2021-02-19 17:25:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17782 states, 17781 states have (on average 2.9817783026826388) internal successors, (53019), 17781 states have internal predecessors, (53019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:41,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17782 states to 17782 states and 53019 transitions. [2021-02-19 17:25:41,576 INFO L78 Accepts]: Start accepts. Automaton has 17782 states and 53019 transitions. Word has length 23 [2021-02-19 17:25:41,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:41,576 INFO L480 AbstractCegarLoop]: Abstraction has 17782 states and 53019 transitions. [2021-02-19 17:25:41,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:41,576 INFO L276 IsEmpty]: Start isEmpty. Operand 17782 states and 53019 transitions. [2021-02-19 17:25:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:41,588 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:41,588 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:41,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3307 [2021-02-19 17:25:41,789 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:41,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:41,789 INFO L82 PathProgramCache]: Analyzing trace with hash -525901275, now seen corresponding path program 299 times [2021-02-19 17:25:41,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:41,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578463158] [2021-02-19 17:25:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:41,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578463158] [2021-02-19 17:25:41,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366108896] [2021-02-19 17:25:41,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:41,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:25:41,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:41,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:25:41,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:41,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:41,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:25:41,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912429945] [2021-02-19 17:25:41,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:25:41,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:41,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:25:41,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:25:41,928 INFO L87 Difference]: Start difference. First operand 17782 states and 53019 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:42,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:42,082 INFO L93 Difference]: Finished difference Result 18141 states and 53642 transitions. [2021-02-19 17:25:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:25:42,083 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:42,107 INFO L225 Difference]: With dead ends: 18141 [2021-02-19 17:25:42,107 INFO L226 Difference]: Without dead ends: 18139 [2021-02-19 17:25:42,107 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:42,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18139 states. [2021-02-19 17:25:42,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18139 to 17811. [2021-02-19 17:25:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.9820325659741718) internal successors, (53110), 17810 states have internal predecessors, (53110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:42,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 53110 transitions. [2021-02-19 17:25:42,351 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 53110 transitions. Word has length 23 [2021-02-19 17:25:42,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:42,351 INFO L480 AbstractCegarLoop]: Abstraction has 17811 states and 53110 transitions. [2021-02-19 17:25:42,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:42,351 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 53110 transitions. [2021-02-19 17:25:42,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:42,365 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:42,365 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:42,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3308,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:42,565 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1219553415, now seen corresponding path program 300 times [2021-02-19 17:25:42,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:42,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955561512] [2021-02-19 17:25:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:42,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955561512] [2021-02-19 17:25:42,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182306117] [2021-02-19 17:25:42,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:42,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:25:42,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:42,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:25:42,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:42,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:42,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:25:42,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69455673] [2021-02-19 17:25:42,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:25:42,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:42,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:25:42,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:25:42,718 INFO L87 Difference]: Start difference. First operand 17811 states and 53110 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:42,847 INFO L93 Difference]: Finished difference Result 18052 states and 53451 transitions. [2021-02-19 17:25:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:25:42,848 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:42,870 INFO L225 Difference]: With dead ends: 18052 [2021-02-19 17:25:42,870 INFO L226 Difference]: Without dead ends: 18050 [2021-02-19 17:25:42,870 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:42,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18050 states. [2021-02-19 17:25:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18050 to 17811. [2021-02-19 17:25:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.9818641212801795) internal successors, (53107), 17810 states have internal predecessors, (53107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 53107 transitions. [2021-02-19 17:25:43,122 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 53107 transitions. Word has length 23 [2021-02-19 17:25:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:43,122 INFO L480 AbstractCegarLoop]: Abstraction has 17811 states and 53107 transitions. [2021-02-19 17:25:43,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 53107 transitions. [2021-02-19 17:25:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:43,135 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:43,135 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:43,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3309 [2021-02-19 17:25:43,335 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:43,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:43,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1364800573, now seen corresponding path program 301 times [2021-02-19 17:25:43,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:43,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904052552] [2021-02-19 17:25:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:43,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904052552] [2021-02-19 17:25:43,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257829524] [2021-02-19 17:25:43,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:43,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:43,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:43,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:43,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-02-19 17:25:43,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055129636] [2021-02-19 17:25:43,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:25:43,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:43,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:25:43,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:25:43,481 INFO L87 Difference]: Start difference. First operand 17811 states and 53107 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:43,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:43,705 INFO L93 Difference]: Finished difference Result 18052 states and 53450 transitions. [2021-02-19 17:25:43,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:25:43,705 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:43,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:43,730 INFO L225 Difference]: With dead ends: 18052 [2021-02-19 17:25:43,731 INFO L226 Difference]: Without dead ends: 18048 [2021-02-19 17:25:43,731 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:25:43,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18048 states. [2021-02-19 17:25:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18048 to 17791. [2021-02-19 17:25:44,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17791 states, 17790 states have (on average 2.9807757166947724) internal successors, (53028), 17790 states have internal predecessors, (53028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17791 states to 17791 states and 53028 transitions. [2021-02-19 17:25:44,037 INFO L78 Accepts]: Start accepts. Automaton has 17791 states and 53028 transitions. Word has length 23 [2021-02-19 17:25:44,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:44,037 INFO L480 AbstractCegarLoop]: Abstraction has 17791 states and 53028 transitions. [2021-02-19 17:25:44,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:44,038 INFO L276 IsEmpty]: Start isEmpty. Operand 17791 states and 53028 transitions. [2021-02-19 17:25:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:44,053 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:44,053 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:44,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3310,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:44,254 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:44,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:44,254 INFO L82 PathProgramCache]: Analyzing trace with hash 124604423, now seen corresponding path program 302 times [2021-02-19 17:25:44,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:44,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559993925] [2021-02-19 17:25:44,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:44,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559993925] [2021-02-19 17:25:44,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005471113] [2021-02-19 17:25:44,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:44,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:44,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:44,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:44,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:44,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:44,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-02-19 17:25:44,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980191269] [2021-02-19 17:25:44,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:44,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:44,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:44,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:44,393 INFO L87 Difference]: Start difference. First operand 17791 states and 53028 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:44,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:44,653 INFO L93 Difference]: Finished difference Result 18033 states and 53375 transitions. [2021-02-19 17:25:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:25:44,653 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:44,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:44,675 INFO L225 Difference]: With dead ends: 18033 [2021-02-19 17:25:44,675 INFO L226 Difference]: Without dead ends: 18027 [2021-02-19 17:25:44,676 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:25:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18027 states. [2021-02-19 17:25:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18027 to 17781. [2021-02-19 17:25:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17781 states, 17780 states have (on average 2.9802024746906635) internal successors, (52988), 17780 states have internal predecessors, (52988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17781 states to 17781 states and 52988 transitions. [2021-02-19 17:25:44,917 INFO L78 Accepts]: Start accepts. Automaton has 17781 states and 52988 transitions. Word has length 23 [2021-02-19 17:25:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:44,917 INFO L480 AbstractCegarLoop]: Abstraction has 17781 states and 52988 transitions. [2021-02-19 17:25:44,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:44,917 INFO L276 IsEmpty]: Start isEmpty. Operand 17781 states and 52988 transitions. [2021-02-19 17:25:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:44,930 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:44,930 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:45,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:45,131 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:45,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:45,131 INFO L82 PathProgramCache]: Analyzing trace with hash -948480957, now seen corresponding path program 303 times [2021-02-19 17:25:45,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:45,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652695330] [2021-02-19 17:25:45,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:45,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652695330] [2021-02-19 17:25:45,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053818029] [2021-02-19 17:25:45,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:45,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:25:45,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:45,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:25:45,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:45,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:45,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:25:45,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376980303] [2021-02-19 17:25:45,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:45,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:45,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:45,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:45,287 INFO L87 Difference]: Start difference. First operand 17781 states and 52988 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:45,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:45,568 INFO L93 Difference]: Finished difference Result 18027 states and 53341 transitions. [2021-02-19 17:25:45,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:25:45,569 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:45,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:45,593 INFO L225 Difference]: With dead ends: 18027 [2021-02-19 17:25:45,594 INFO L226 Difference]: Without dead ends: 18021 [2021-02-19 17:25:45,594 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:25:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18021 states. [2021-02-19 17:25:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18021 to 17781. [2021-02-19 17:25:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17781 states, 17780 states have (on average 2.9797525309336335) internal successors, (52980), 17780 states have internal predecessors, (52980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17781 states to 17781 states and 52980 transitions. [2021-02-19 17:25:45,854 INFO L78 Accepts]: Start accepts. Automaton has 17781 states and 52980 transitions. Word has length 23 [2021-02-19 17:25:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:45,854 INFO L480 AbstractCegarLoop]: Abstraction has 17781 states and 52980 transitions. [2021-02-19 17:25:45,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 17781 states and 52980 transitions. [2021-02-19 17:25:45,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:45,869 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:45,869 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:46,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3312 [2021-02-19 17:25:46,069 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:46,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:46,069 INFO L82 PathProgramCache]: Analyzing trace with hash 145610631, now seen corresponding path program 304 times [2021-02-19 17:25:46,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:46,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644046281] [2021-02-19 17:25:46,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:46,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644046281] [2021-02-19 17:25:46,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393999188] [2021-02-19 17:25:46,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:46,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:46,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:46,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:46,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:46,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:46,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-02-19 17:25:46,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774595990] [2021-02-19 17:25:46,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:46,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:46,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:46,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:46,221 INFO L87 Difference]: Start difference. First operand 17781 states and 52980 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:46,484 INFO L93 Difference]: Finished difference Result 18334 states and 54202 transitions. [2021-02-19 17:25:46,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:25:46,484 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:46,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:46,507 INFO L225 Difference]: With dead ends: 18334 [2021-02-19 17:25:46,507 INFO L226 Difference]: Without dead ends: 18326 [2021-02-19 17:25:46,507 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:25:46,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18326 states. [2021-02-19 17:25:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18326 to 17796. [2021-02-19 17:25:46,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17796 states, 17795 states have (on average 2.9793200337173364) internal successors, (53017), 17795 states have internal predecessors, (53017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:46,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17796 states to 17796 states and 53017 transitions. [2021-02-19 17:25:46,786 INFO L78 Accepts]: Start accepts. Automaton has 17796 states and 53017 transitions. Word has length 23 [2021-02-19 17:25:46,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:46,786 INFO L480 AbstractCegarLoop]: Abstraction has 17796 states and 53017 transitions. [2021-02-19 17:25:46,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 17796 states and 53017 transitions. [2021-02-19 17:25:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:46,799 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:46,799 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:46,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:46,999 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:47,000 INFO L82 PathProgramCache]: Analyzing trace with hash -343777649, now seen corresponding path program 305 times [2021-02-19 17:25:47,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:47,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480686536] [2021-02-19 17:25:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:47,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480686536] [2021-02-19 17:25:47,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538063625] [2021-02-19 17:25:47,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:47,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:25:47,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:47,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:47,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:47,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:47,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-02-19 17:25:47,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202612292] [2021-02-19 17:25:47,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:47,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:47,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:47,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:47,149 INFO L87 Difference]: Start difference. First operand 17796 states and 53017 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:47,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:47,403 INFO L93 Difference]: Finished difference Result 18012 states and 53369 transitions. [2021-02-19 17:25:47,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:25:47,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:47,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:47,428 INFO L225 Difference]: With dead ends: 18012 [2021-02-19 17:25:47,428 INFO L226 Difference]: Without dead ends: 18004 [2021-02-19 17:25:47,428 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:25:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18004 states. [2021-02-19 17:25:47,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18004 to 17791. [2021-02-19 17:25:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17791 states, 17790 states have (on average 2.979033164699269) internal successors, (52997), 17790 states have internal predecessors, (52997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17791 states to 17791 states and 52997 transitions. [2021-02-19 17:25:47,667 INFO L78 Accepts]: Start accepts. Automaton has 17791 states and 52997 transitions. Word has length 23 [2021-02-19 17:25:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:47,667 INFO L480 AbstractCegarLoop]: Abstraction has 17791 states and 52997 transitions. [2021-02-19 17:25:47,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 17791 states and 52997 transitions. [2021-02-19 17:25:47,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:47,681 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:47,681 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:47,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3314 [2021-02-19 17:25:47,881 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:47,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:47,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2012220563, now seen corresponding path program 306 times [2021-02-19 17:25:47,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:47,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173004680] [2021-02-19 17:25:47,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:47,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173004680] [2021-02-19 17:25:47,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31972309] [2021-02-19 17:25:47,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:47,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:25:47,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:47,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:25:47,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:48,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:48,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:25:48,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547458082] [2021-02-19 17:25:48,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:25:48,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:48,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:25:48,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:25:48,015 INFO L87 Difference]: Start difference. First operand 17791 states and 52997 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:48,146 INFO L93 Difference]: Finished difference Result 18139 states and 53550 transitions. [2021-02-19 17:25:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:25:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:48,172 INFO L225 Difference]: With dead ends: 18139 [2021-02-19 17:25:48,172 INFO L226 Difference]: Without dead ends: 18137 [2021-02-19 17:25:48,172 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18137 states. [2021-02-19 17:25:48,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18137 to 17803. [2021-02-19 17:25:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17803 states, 17802 states have (on average 2.978597910347152) internal successors, (53025), 17802 states have internal predecessors, (53025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17803 states to 17803 states and 53025 transitions. [2021-02-19 17:25:48,435 INFO L78 Accepts]: Start accepts. Automaton has 17803 states and 53025 transitions. Word has length 23 [2021-02-19 17:25:48,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:48,435 INFO L480 AbstractCegarLoop]: Abstraction has 17803 states and 53025 transitions. [2021-02-19 17:25:48,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:48,435 INFO L276 IsEmpty]: Start isEmpty. Operand 17803 states and 53025 transitions. [2021-02-19 17:25:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:48,450 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:48,450 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:48,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3315,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:48,650 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:48,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:48,650 INFO L82 PathProgramCache]: Analyzing trace with hash -537292043, now seen corresponding path program 307 times [2021-02-19 17:25:48,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:48,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357861050] [2021-02-19 17:25:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:48,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357861050] [2021-02-19 17:25:48,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733513979] [2021-02-19 17:25:48,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:48,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:48,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:48,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:48,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-02-19 17:25:48,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215748856] [2021-02-19 17:25:48,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:25:48,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:48,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:25:48,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:25:48,779 INFO L87 Difference]: Start difference. First operand 17803 states and 53025 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:48,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:48,944 INFO L93 Difference]: Finished difference Result 18222 states and 53714 transitions. [2021-02-19 17:25:48,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:25:48,945 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:48,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:48,969 INFO L225 Difference]: With dead ends: 18222 [2021-02-19 17:25:48,969 INFO L226 Difference]: Without dead ends: 18221 [2021-02-19 17:25:48,969 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:25:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18221 states. [2021-02-19 17:25:49,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18221 to 17797. [2021-02-19 17:25:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17797 states, 17796 states have (on average 2.977523038885143) internal successors, (52988), 17796 states have internal predecessors, (52988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17797 states to 17797 states and 52988 transitions. [2021-02-19 17:25:49,290 INFO L78 Accepts]: Start accepts. Automaton has 17797 states and 52988 transitions. Word has length 23 [2021-02-19 17:25:49,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:49,290 INFO L480 AbstractCegarLoop]: Abstraction has 17797 states and 52988 transitions. [2021-02-19 17:25:49,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:49,290 INFO L276 IsEmpty]: Start isEmpty. Operand 17797 states and 52988 transitions. [2021-02-19 17:25:49,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:49,305 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:49,305 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:49,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3316 [2021-02-19 17:25:49,505 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:49,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1173321265, now seen corresponding path program 308 times [2021-02-19 17:25:49,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:49,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216967576] [2021-02-19 17:25:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:49,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216967576] [2021-02-19 17:25:49,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800045370] [2021-02-19 17:25:49,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:49,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:49,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:49,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:49,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:49,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:49,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-02-19 17:25:49,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894818093] [2021-02-19 17:25:49,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:25:49,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:49,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:25:49,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:25:49,635 INFO L87 Difference]: Start difference. First operand 17797 states and 52988 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:49,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:49,851 INFO L93 Difference]: Finished difference Result 18086 states and 53397 transitions. [2021-02-19 17:25:49,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:25:49,851 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:49,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:49,873 INFO L225 Difference]: With dead ends: 18086 [2021-02-19 17:25:49,873 INFO L226 Difference]: Without dead ends: 18081 [2021-02-19 17:25:49,873 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:25:49,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18081 states. [2021-02-19 17:25:50,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18081 to 17786. [2021-02-19 17:25:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17786 states, 17785 states have (on average 2.9760472308124823) internal successors, (52929), 17785 states have internal predecessors, (52929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17786 states to 17786 states and 52929 transitions. [2021-02-19 17:25:50,119 INFO L78 Accepts]: Start accepts. Automaton has 17786 states and 52929 transitions. Word has length 23 [2021-02-19 17:25:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:50,119 INFO L480 AbstractCegarLoop]: Abstraction has 17786 states and 52929 transitions. [2021-02-19 17:25:50,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 17786 states and 52929 transitions. [2021-02-19 17:25:50,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:50,134 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:50,134 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:50,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3317,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:50,334 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:50,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1632241035, now seen corresponding path program 309 times [2021-02-19 17:25:50,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:50,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780385917] [2021-02-19 17:25:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:50,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780385917] [2021-02-19 17:25:50,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914465981] [2021-02-19 17:25:50,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:50,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:25:50,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:50,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:25:50,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:50,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:50,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:25:50,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213933661] [2021-02-19 17:25:50,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:50,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:50,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:50,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:50,479 INFO L87 Difference]: Start difference. First operand 17786 states and 52929 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:50,729 INFO L93 Difference]: Finished difference Result 18075 states and 53338 transitions. [2021-02-19 17:25:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:25:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:50,752 INFO L225 Difference]: With dead ends: 18075 [2021-02-19 17:25:50,752 INFO L226 Difference]: Without dead ends: 18065 [2021-02-19 17:25:50,753 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:25:50,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18065 states. [2021-02-19 17:25:50,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18065 to 17767. [2021-02-19 17:25:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17767 states, 17766 states have (on average 2.9750084430935493) internal successors, (52854), 17766 states have internal predecessors, (52854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17767 states to 17767 states and 52854 transitions. [2021-02-19 17:25:51,005 INFO L78 Accepts]: Start accepts. Automaton has 17767 states and 52854 transitions. Word has length 23 [2021-02-19 17:25:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:51,005 INFO L480 AbstractCegarLoop]: Abstraction has 17767 states and 52854 transitions. [2021-02-19 17:25:51,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 17767 states and 52854 transitions. [2021-02-19 17:25:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:51,018 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:51,018 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:51,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3318,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:51,219 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:51,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:51,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1589640881, now seen corresponding path program 310 times [2021-02-19 17:25:51,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:51,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461358163] [2021-02-19 17:25:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:51,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461358163] [2021-02-19 17:25:51,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640787883] [2021-02-19 17:25:51,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:51,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:51,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:51,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:51,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:51,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-02-19 17:25:51,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707577622] [2021-02-19 17:25:51,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:51,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:51,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:51,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:51,357 INFO L87 Difference]: Start difference. First operand 17767 states and 52854 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:51,561 INFO L93 Difference]: Finished difference Result 18935 states and 55649 transitions. [2021-02-19 17:25:51,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:25:51,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:51,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:51,584 INFO L225 Difference]: With dead ends: 18935 [2021-02-19 17:25:51,584 INFO L226 Difference]: Without dead ends: 18929 [2021-02-19 17:25:51,585 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:25:51,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18929 states. [2021-02-19 17:25:51,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18929 to 17786. [2021-02-19 17:25:51,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17786 states, 17785 states have (on average 2.9745290975541185) internal successors, (52902), 17785 states have internal predecessors, (52902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17786 states to 17786 states and 52902 transitions. [2021-02-19 17:25:51,924 INFO L78 Accepts]: Start accepts. Automaton has 17786 states and 52902 transitions. Word has length 23 [2021-02-19 17:25:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:51,924 INFO L480 AbstractCegarLoop]: Abstraction has 17786 states and 52902 transitions. [2021-02-19 17:25:51,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 17786 states and 52902 transitions. [2021-02-19 17:25:51,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:51,939 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:51,939 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:52,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3319 [2021-02-19 17:25:52,140 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:52,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:52,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1611234827, now seen corresponding path program 311 times [2021-02-19 17:25:52,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:52,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473767632] [2021-02-19 17:25:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:52,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473767632] [2021-02-19 17:25:52,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37479558] [2021-02-19 17:25:52,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:52,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:25:52,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:52,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:52,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:52,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:52,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-02-19 17:25:52,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350259484] [2021-02-19 17:25:52,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:52,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:52,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:52,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:52,329 INFO L87 Difference]: Start difference. First operand 17786 states and 52902 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:52,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:52,579 INFO L93 Difference]: Finished difference Result 18949 states and 55658 transitions. [2021-02-19 17:25:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:25:52,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:52,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:52,602 INFO L225 Difference]: With dead ends: 18949 [2021-02-19 17:25:52,602 INFO L226 Difference]: Without dead ends: 18941 [2021-02-19 17:25:52,603 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:25:52,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18941 states. [2021-02-19 17:25:52,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18941 to 17811. [2021-02-19 17:25:52,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.9744525547445257) internal successors, (52975), 17810 states have internal predecessors, (52975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52975 transitions. [2021-02-19 17:25:52,884 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52975 transitions. Word has length 23 [2021-02-19 17:25:52,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:52,884 INFO L480 AbstractCegarLoop]: Abstraction has 17811 states and 52975 transitions. [2021-02-19 17:25:52,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52975 transitions. [2021-02-19 17:25:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:52,898 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:52,898 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:53,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-02-19 17:25:53,098 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:53,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2054133967, now seen corresponding path program 312 times [2021-02-19 17:25:53,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:53,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711133718] [2021-02-19 17:25:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:53,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711133718] [2021-02-19 17:25:53,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594477910] [2021-02-19 17:25:53,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:53,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:25:53,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:53,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:25:53,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:53,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:53,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:25:53,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698214508] [2021-02-19 17:25:53,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:53,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:53,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:53,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:53,253 INFO L87 Difference]: Start difference. First operand 17811 states and 52975 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:53,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:53,513 INFO L93 Difference]: Finished difference Result 18450 states and 54395 transitions. [2021-02-19 17:25:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:25:53,514 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:53,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:53,538 INFO L225 Difference]: With dead ends: 18450 [2021-02-19 17:25:53,538 INFO L226 Difference]: Without dead ends: 18440 [2021-02-19 17:25:53,538 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=257, Invalid=555, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:25:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18440 states. [2021-02-19 17:25:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18440 to 17811. [2021-02-19 17:25:53,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.974227961819203) internal successors, (52971), 17810 states have internal predecessors, (52971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52971 transitions. [2021-02-19 17:25:53,781 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52971 transitions. Word has length 23 [2021-02-19 17:25:53,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:53,781 INFO L480 AbstractCegarLoop]: Abstraction has 17811 states and 52971 transitions. [2021-02-19 17:25:53,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:53,782 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52971 transitions. [2021-02-19 17:25:53,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:53,795 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:53,795 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:53,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3321,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:53,996 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:53,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:53,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1854109379, now seen corresponding path program 313 times [2021-02-19 17:25:53,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:53,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006256435] [2021-02-19 17:25:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:54,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006256435] [2021-02-19 17:25:54,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791942660] [2021-02-19 17:25:54,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:54,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:54,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:54,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:54,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-02-19 17:25:54,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992566528] [2021-02-19 17:25:54,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:54,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:54,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:54,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:54,148 INFO L87 Difference]: Start difference. First operand 17811 states and 52971 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:54,365 INFO L93 Difference]: Finished difference Result 18106 states and 53420 transitions. [2021-02-19 17:25:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:25:54,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:54,385 INFO L225 Difference]: With dead ends: 18106 [2021-02-19 17:25:54,385 INFO L226 Difference]: Without dead ends: 18094 [2021-02-19 17:25:54,385 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:25:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18094 states. [2021-02-19 17:25:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18094 to 17768. [2021-02-19 17:25:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17768 states, 17767 states have (on average 2.9733776101761693) internal successors, (52828), 17767 states have internal predecessors, (52828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17768 states to 17768 states and 52828 transitions. [2021-02-19 17:25:54,635 INFO L78 Accepts]: Start accepts. Automaton has 17768 states and 52828 transitions. Word has length 23 [2021-02-19 17:25:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:54,635 INFO L480 AbstractCegarLoop]: Abstraction has 17768 states and 52828 transitions. [2021-02-19 17:25:54,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 17768 states and 52828 transitions. [2021-02-19 17:25:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:54,648 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:54,648 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:54,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3322,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:54,849 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:54,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1346766329, now seen corresponding path program 314 times [2021-02-19 17:25:54,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:54,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460406437] [2021-02-19 17:25:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:54,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460406437] [2021-02-19 17:25:54,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923357156] [2021-02-19 17:25:54,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:54,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:25:54,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:54,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:54,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:54,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:54,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-02-19 17:25:54,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071874838] [2021-02-19 17:25:54,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:54,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:54,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:54,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:54,997 INFO L87 Difference]: Start difference. First operand 17768 states and 52828 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:55,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:55,256 INFO L93 Difference]: Finished difference Result 18074 states and 53293 transitions. [2021-02-19 17:25:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:25:55,256 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:55,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:55,279 INFO L225 Difference]: With dead ends: 18074 [2021-02-19 17:25:55,279 INFO L226 Difference]: Without dead ends: 18062 [2021-02-19 17:25:55,279 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:25:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18062 states. [2021-02-19 17:25:55,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18062 to 17736. [2021-02-19 17:25:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17736 states, 17735 states have (on average 2.9733859599661687) internal successors, (52733), 17735 states have internal predecessors, (52733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17736 states to 17736 states and 52733 transitions. [2021-02-19 17:25:55,573 INFO L78 Accepts]: Start accepts. Automaton has 17736 states and 52733 transitions. Word has length 23 [2021-02-19 17:25:55,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:55,573 INFO L480 AbstractCegarLoop]: Abstraction has 17736 states and 52733 transitions. [2021-02-19 17:25:55,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:55,573 INFO L276 IsEmpty]: Start isEmpty. Operand 17736 states and 52733 transitions. [2021-02-19 17:25:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:55,587 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:55,587 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:55,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3323,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:55,787 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:55,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:55,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1789665469, now seen corresponding path program 315 times [2021-02-19 17:25:55,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:55,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488684142] [2021-02-19 17:25:55,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:55,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488684142] [2021-02-19 17:25:55,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507319639] [2021-02-19 17:25:55,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:55,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:25:55,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:55,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:25:55,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:55,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:55,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:25:55,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978642224] [2021-02-19 17:25:55,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:25:55,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:55,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:25:55,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:25:55,941 INFO L87 Difference]: Start difference. First operand 17736 states and 52733 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:56,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:56,191 INFO L93 Difference]: Finished difference Result 18446 states and 54311 transitions. [2021-02-19 17:25:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:25:56,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:56,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:56,211 INFO L225 Difference]: With dead ends: 18446 [2021-02-19 17:25:56,211 INFO L226 Difference]: Without dead ends: 18431 [2021-02-19 17:25:56,212 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:25:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18431 states. [2021-02-19 17:25:56,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18431 to 17723. [2021-02-19 17:25:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17723 states, 17722 states have (on average 2.9739307075950796) internal successors, (52704), 17722 states have internal predecessors, (52704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17723 states to 17723 states and 52704 transitions. [2021-02-19 17:25:56,433 INFO L78 Accepts]: Start accepts. Automaton has 17723 states and 52704 transitions. Word has length 23 [2021-02-19 17:25:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:56,433 INFO L480 AbstractCegarLoop]: Abstraction has 17723 states and 52704 transitions. [2021-02-19 17:25:56,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:56,433 INFO L276 IsEmpty]: Start isEmpty. Operand 17723 states and 52704 transitions. [2021-02-19 17:25:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:56,446 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:56,446 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:56,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3324,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:56,647 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:56,647 INFO L82 PathProgramCache]: Analyzing trace with hash -45301463, now seen corresponding path program 316 times [2021-02-19 17:25:56,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:56,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422514176] [2021-02-19 17:25:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:56,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422514176] [2021-02-19 17:25:56,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74502325] [2021-02-19 17:25:56,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:56,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:25:56,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:56,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:56,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:56,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:56,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-02-19 17:25:56,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950071890] [2021-02-19 17:25:56,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:25:56,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:56,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:25:56,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:56,808 INFO L87 Difference]: Start difference. First operand 17723 states and 52704 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:57,078 INFO L93 Difference]: Finished difference Result 17974 states and 53110 transitions. [2021-02-19 17:25:57,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:25:57,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:57,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:57,104 INFO L225 Difference]: With dead ends: 17974 [2021-02-19 17:25:57,104 INFO L226 Difference]: Without dead ends: 17964 [2021-02-19 17:25:57,105 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:25:57,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17964 states. [2021-02-19 17:25:57,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17964 to 17713. [2021-02-19 17:25:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17713 states, 17712 states have (on average 2.9735207768744356) internal successors, (52667), 17712 states have internal predecessors, (52667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17713 states to 17713 states and 52667 transitions. [2021-02-19 17:25:57,337 INFO L78 Accepts]: Start accepts. Automaton has 17713 states and 52667 transitions. Word has length 23 [2021-02-19 17:25:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:57,337 INFO L480 AbstractCegarLoop]: Abstraction has 17713 states and 52667 transitions. [2021-02-19 17:25:57,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 17713 states and 52667 transitions. [2021-02-19 17:25:57,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:57,350 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:57,350 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:57,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3325,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:57,551 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:57,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:57,551 INFO L82 PathProgramCache]: Analyzing trace with hash -910381083, now seen corresponding path program 317 times [2021-02-19 17:25:57,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:57,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399888552] [2021-02-19 17:25:57,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:57,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399888552] [2021-02-19 17:25:57,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4229020] [2021-02-19 17:25:57,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:57,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:25:57,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:57,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:57,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:57,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:57,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-02-19 17:25:57,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517539042] [2021-02-19 17:25:57,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:25:57,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:57,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:25:57,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:25:57,680 INFO L87 Difference]: Start difference. First operand 17713 states and 52667 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:57,807 INFO L93 Difference]: Finished difference Result 18101 states and 53291 transitions. [2021-02-19 17:25:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:25:57,807 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:57,828 INFO L225 Difference]: With dead ends: 18101 [2021-02-19 17:25:57,828 INFO L226 Difference]: Without dead ends: 18101 [2021-02-19 17:25:57,829 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:25:57,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18101 states. [2021-02-19 17:25:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18101 to 17720. [2021-02-19 17:25:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17720 states, 17719 states have (on average 2.9725718155652125) internal successors, (52671), 17719 states have internal predecessors, (52671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17720 states to 17720 states and 52671 transitions. [2021-02-19 17:25:58,065 INFO L78 Accepts]: Start accepts. Automaton has 17720 states and 52671 transitions. Word has length 23 [2021-02-19 17:25:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:58,065 INFO L480 AbstractCegarLoop]: Abstraction has 17720 states and 52671 transitions. [2021-02-19 17:25:58,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 17720 states and 52671 transitions. [2021-02-19 17:25:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:58,077 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:58,077 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:58,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3326 [2021-02-19 17:25:58,278 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:58,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:58,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1749280381, now seen corresponding path program 318 times [2021-02-19 17:25:58,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:58,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679414158] [2021-02-19 17:25:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:58,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679414158] [2021-02-19 17:25:58,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871477797] [2021-02-19 17:25:58,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:58,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:25:58,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:25:58,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:25:58,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:25:58,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:58,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:25:58,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832514396] [2021-02-19 17:25:58,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:25:58,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:58,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:25:58,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:25:58,408 INFO L87 Difference]: Start difference. First operand 17720 states and 52671 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:58,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:58,612 INFO L93 Difference]: Finished difference Result 18021 states and 53093 transitions. [2021-02-19 17:25:58,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:25:58,612 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:58,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:58,697 INFO L225 Difference]: With dead ends: 18021 [2021-02-19 17:25:58,697 INFO L226 Difference]: Without dead ends: 18016 [2021-02-19 17:25:58,697 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:25:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18016 states. [2021-02-19 17:25:58,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18016 to 17704. [2021-02-19 17:25:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17704 states, 17703 states have (on average 2.9706829350957467) internal successors, (52590), 17703 states have internal predecessors, (52590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17704 states to 17704 states and 52590 transitions. [2021-02-19 17:25:58,918 INFO L78 Accepts]: Start accepts. Automaton has 17704 states and 52590 transitions. Word has length 23 [2021-02-19 17:25:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:58,919 INFO L480 AbstractCegarLoop]: Abstraction has 17704 states and 52590 transitions. [2021-02-19 17:25:58,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 17704 states and 52590 transitions. [2021-02-19 17:25:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:58,931 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:58,931 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:59,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3327,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:59,132 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:59,132 INFO L82 PathProgramCache]: Analyzing trace with hash -259875385, now seen corresponding path program 319 times [2021-02-19 17:25:59,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:59,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000112005] [2021-02-19 17:25:59,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:25:59,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000112005] [2021-02-19 17:25:59,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888667861] [2021-02-19 17:25:59,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:25:59,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:25:59,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:25:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:25:59,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:25:59,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-02-19 17:25:59,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758606214] [2021-02-19 17:25:59,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:25:59,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:25:59,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:25:59,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:25:59,276 INFO L87 Difference]: Start difference. First operand 17704 states and 52590 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:59,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:25:59,513 INFO L93 Difference]: Finished difference Result 18004 states and 53012 transitions. [2021-02-19 17:25:59,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:25:59,514 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:25:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:25:59,537 INFO L225 Difference]: With dead ends: 18004 [2021-02-19 17:25:59,537 INFO L226 Difference]: Without dead ends: 17996 [2021-02-19 17:25:59,537 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:25:59,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17996 states. [2021-02-19 17:25:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17996 to 17678. [2021-02-19 17:25:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17678 states, 17677 states have (on average 2.969395259376591) internal successors, (52490), 17677 states have internal predecessors, (52490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:59,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17678 states to 17678 states and 52490 transitions. [2021-02-19 17:25:59,777 INFO L78 Accepts]: Start accepts. Automaton has 17678 states and 52490 transitions. Word has length 23 [2021-02-19 17:25:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:25:59,777 INFO L480 AbstractCegarLoop]: Abstraction has 17678 states and 52490 transitions. [2021-02-19 17:25:59,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:25:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 17678 states and 52490 transitions. [2021-02-19 17:25:59,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:25:59,790 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:25:59,790 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:25:59,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3328,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:59,990 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:25:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:25:59,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1332960765, now seen corresponding path program 320 times [2021-02-19 17:25:59,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:25:59,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927046534] [2021-02-19 17:25:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:25:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:00,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927046534] [2021-02-19 17:26:00,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660365647] [2021-02-19 17:26:00,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:00,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:26:00,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:00,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:00,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:00,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:00,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-02-19 17:26:00,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068209734] [2021-02-19 17:26:00,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:26:00,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:00,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:26:00,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:26:00,136 INFO L87 Difference]: Start difference. First operand 17678 states and 52490 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:00,382 INFO L93 Difference]: Finished difference Result 17978 states and 52913 transitions. [2021-02-19 17:26:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:26:00,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:00,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:00,404 INFO L225 Difference]: With dead ends: 17978 [2021-02-19 17:26:00,404 INFO L226 Difference]: Without dead ends: 17969 [2021-02-19 17:26:00,404 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:26:00,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17969 states. [2021-02-19 17:26:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17969 to 17662. [2021-02-19 17:26:00,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17662 states, 17661 states have (on average 2.9688579355642375) internal successors, (52433), 17661 states have internal predecessors, (52433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17662 states to 17662 states and 52433 transitions. [2021-02-19 17:26:00,628 INFO L78 Accepts]: Start accepts. Automaton has 17662 states and 52433 transitions. Word has length 23 [2021-02-19 17:26:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:00,628 INFO L480 AbstractCegarLoop]: Abstraction has 17662 states and 52433 transitions. [2021-02-19 17:26:00,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 17662 states and 52433 transitions. [2021-02-19 17:26:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:00,641 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:00,641 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:00,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3329 [2021-02-19 17:26:00,841 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:00,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:00,842 INFO L82 PathProgramCache]: Analyzing trace with hash -238869177, now seen corresponding path program 321 times [2021-02-19 17:26:00,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:00,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083940997] [2021-02-19 17:26:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:00,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083940997] [2021-02-19 17:26:00,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184768107] [2021-02-19 17:26:00,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:00,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:26:00,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:00,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:00,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:00,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:00,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:26:00,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369529685] [2021-02-19 17:26:00,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:26:00,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:00,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:26:00,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:26:00,991 INFO L87 Difference]: Start difference. First operand 17662 states and 52433 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:01,228 INFO L93 Difference]: Finished difference Result 19356 states and 56609 transitions. [2021-02-19 17:26:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:26:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:01,252 INFO L225 Difference]: With dead ends: 19356 [2021-02-19 17:26:01,252 INFO L226 Difference]: Without dead ends: 19348 [2021-02-19 17:26:01,253 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:26:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19348 states. [2021-02-19 17:26:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19348 to 17716. [2021-02-19 17:26:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17716 states, 17715 states have (on average 2.967880327406153) internal successors, (52576), 17715 states have internal predecessors, (52576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17716 states to 17716 states and 52576 transitions. [2021-02-19 17:26:01,485 INFO L78 Accepts]: Start accepts. Automaton has 17716 states and 52576 transitions. Word has length 23 [2021-02-19 17:26:01,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:01,485 INFO L480 AbstractCegarLoop]: Abstraction has 17716 states and 52576 transitions. [2021-02-19 17:26:01,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:01,486 INFO L276 IsEmpty]: Start isEmpty. Operand 17716 states and 52576 transitions. [2021-02-19 17:26:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:01,498 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:01,498 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:01,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3330 [2021-02-19 17:26:01,698 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:01,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:01,699 INFO L82 PathProgramCache]: Analyzing trace with hash -681768317, now seen corresponding path program 322 times [2021-02-19 17:26:01,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:01,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287553296] [2021-02-19 17:26:01,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:01,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287553296] [2021-02-19 17:26:01,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368111985] [2021-02-19 17:26:01,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:01,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:26:01,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:01,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:01,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:01,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:01,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-02-19 17:26:01,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494921676] [2021-02-19 17:26:01,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:26:01,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:01,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:26:01,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:26:01,959 INFO L87 Difference]: Start difference. First operand 17716 states and 52576 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:02,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:02,202 INFO L93 Difference]: Finished difference Result 19375 states and 56625 transitions. [2021-02-19 17:26:02,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:26:02,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:02,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:02,227 INFO L225 Difference]: With dead ends: 19375 [2021-02-19 17:26:02,227 INFO L226 Difference]: Without dead ends: 19365 [2021-02-19 17:26:02,227 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:26:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19365 states. [2021-02-19 17:26:02,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19365 to 17772. [2021-02-19 17:26:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17772 states, 17771 states have (on average 2.9668561138934217) internal successors, (52724), 17771 states have internal predecessors, (52724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17772 states to 17772 states and 52724 transitions. [2021-02-19 17:26:02,463 INFO L78 Accepts]: Start accepts. Automaton has 17772 states and 52724 transitions. Word has length 23 [2021-02-19 17:26:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:02,464 INFO L480 AbstractCegarLoop]: Abstraction has 17772 states and 52724 transitions. [2021-02-19 17:26:02,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:02,464 INFO L276 IsEmpty]: Start isEmpty. Operand 17772 states and 52724 transitions. [2021-02-19 17:26:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:02,476 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:02,476 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:02,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3331 [2021-02-19 17:26:02,677 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1526739769, now seen corresponding path program 323 times [2021-02-19 17:26:02,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:02,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422309957] [2021-02-19 17:26:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:02,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422309957] [2021-02-19 17:26:02,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926656417] [2021-02-19 17:26:02,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:02,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:26:02,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:02,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:02,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:02,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:02,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-02-19 17:26:02,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231794998] [2021-02-19 17:26:02,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:26:02,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:02,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:26:02,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:26:02,841 INFO L87 Difference]: Start difference. First operand 17772 states and 52724 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:03,127 INFO L93 Difference]: Finished difference Result 18793 states and 55050 transitions. [2021-02-19 17:26:03,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:26:03,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:03,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:03,151 INFO L225 Difference]: With dead ends: 18793 [2021-02-19 17:26:03,151 INFO L226 Difference]: Without dead ends: 18781 [2021-02-19 17:26:03,151 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:26:03,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18781 states. [2021-02-19 17:26:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18781 to 17772. [2021-02-19 17:26:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17772 states, 17771 states have (on average 2.9665747566259637) internal successors, (52719), 17771 states have internal predecessors, (52719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17772 states to 17772 states and 52719 transitions. [2021-02-19 17:26:03,386 INFO L78 Accepts]: Start accepts. Automaton has 17772 states and 52719 transitions. Word has length 23 [2021-02-19 17:26:03,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:03,386 INFO L480 AbstractCegarLoop]: Abstraction has 17772 states and 52719 transitions. [2021-02-19 17:26:03,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 17772 states and 52719 transitions. [2021-02-19 17:26:03,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:03,399 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:03,399 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:03,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3332,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:03,599 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:03,599 INFO L82 PathProgramCache]: Analyzing trace with hash -630280331, now seen corresponding path program 324 times [2021-02-19 17:26:03,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:03,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342400165] [2021-02-19 17:26:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:03,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342400165] [2021-02-19 17:26:03,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715196467] [2021-02-19 17:26:03,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:03,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:26:03,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:03,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:03,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:03,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:03,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:26:03,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690391796] [2021-02-19 17:26:03,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:26:03,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:03,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:26:03,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:26:03,751 INFO L87 Difference]: Start difference. First operand 17772 states and 52719 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:03,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:03,986 INFO L93 Difference]: Finished difference Result 18087 states and 53235 transitions. [2021-02-19 17:26:03,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:26:03,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:03,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:04,008 INFO L225 Difference]: With dead ends: 18087 [2021-02-19 17:26:04,008 INFO L226 Difference]: Without dead ends: 18075 [2021-02-19 17:26:04,008 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:26:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18075 states. [2021-02-19 17:26:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18075 to 17711. [2021-02-19 17:26:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17711 states, 17710 states have (on average 2.9658385093167703) internal successors, (52525), 17710 states have internal predecessors, (52525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17711 states to 17711 states and 52525 transitions. [2021-02-19 17:26:04,248 INFO L78 Accepts]: Start accepts. Automaton has 17711 states and 52525 transitions. Word has length 23 [2021-02-19 17:26:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:04,248 INFO L480 AbstractCegarLoop]: Abstraction has 17711 states and 52525 transitions. [2021-02-19 17:26:04,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 17711 states and 52525 transitions. [2021-02-19 17:26:04,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:04,261 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:04,261 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:04,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,326 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:04,462 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:04,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:04,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1073179471, now seen corresponding path program 325 times [2021-02-19 17:26:04,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:04,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372875562] [2021-02-19 17:26:04,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:04,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372875562] [2021-02-19 17:26:04,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567517527] [2021-02-19 17:26:04,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:04,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:04,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:04,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:04,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-02-19 17:26:04,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751290444] [2021-02-19 17:26:04,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:26:04,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:04,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:26:04,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:26:04,673 INFO L87 Difference]: Start difference. First operand 17711 states and 52525 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:04,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:04,965 INFO L93 Difference]: Finished difference Result 18039 states and 53062 transitions. [2021-02-19 17:26:04,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:26:04,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:04,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:04,986 INFO L225 Difference]: With dead ends: 18039 [2021-02-19 17:26:04,986 INFO L226 Difference]: Without dead ends: 18029 [2021-02-19 17:26:04,986 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:26:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18029 states. [2021-02-19 17:26:05,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18029 to 17707. [2021-02-19 17:26:05,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17707 states, 17706 states have (on average 2.9655484016717497) internal successors, (52508), 17706 states have internal predecessors, (52508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:05,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17707 states to 17707 states and 52508 transitions. [2021-02-19 17:26:05,298 INFO L78 Accepts]: Start accepts. Automaton has 17707 states and 52508 transitions. Word has length 23 [2021-02-19 17:26:05,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:05,298 INFO L480 AbstractCegarLoop]: Abstraction has 17707 states and 52508 transitions. [2021-02-19 17:26:05,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:05,298 INFO L276 IsEmpty]: Start isEmpty. Operand 17707 states and 52508 transitions. [2021-02-19 17:26:05,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:05,309 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:05,309 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:05,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3334,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:05,510 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:05,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:05,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1918150923, now seen corresponding path program 326 times [2021-02-19 17:26:05,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:05,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973874068] [2021-02-19 17:26:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:05,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973874068] [2021-02-19 17:26:05,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065188324] [2021-02-19 17:26:05,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:05,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:26:05,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:05,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:05,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:05,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:05,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-02-19 17:26:05,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216327145] [2021-02-19 17:26:05,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:26:05,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:05,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:26:05,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:26:05,684 INFO L87 Difference]: Start difference. First operand 17707 states and 52508 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:06,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:06,024 INFO L93 Difference]: Finished difference Result 18499 states and 54288 transitions. [2021-02-19 17:26:06,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:26:06,025 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:06,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:06,048 INFO L225 Difference]: With dead ends: 18499 [2021-02-19 17:26:06,048 INFO L226 Difference]: Without dead ends: 18487 [2021-02-19 17:26:06,049 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=677, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:26:06,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18487 states. [2021-02-19 17:26:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18487 to 17700. [2021-02-19 17:26:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17700 states, 17699 states have (on average 2.9655347759760438) internal successors, (52487), 17699 states have internal predecessors, (52487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17700 states to 17700 states and 52487 transitions. [2021-02-19 17:26:06,308 INFO L78 Accepts]: Start accepts. Automaton has 17700 states and 52487 transitions. Word has length 23 [2021-02-19 17:26:06,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:06,308 INFO L480 AbstractCegarLoop]: Abstraction has 17700 states and 52487 transitions. [2021-02-19 17:26:06,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:06,308 INFO L276 IsEmpty]: Start isEmpty. Operand 17700 states and 52487 transitions. [2021-02-19 17:26:06,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:06,321 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:06,321 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:06,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3335,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:06,521 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:06,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:06,521 INFO L82 PathProgramCache]: Analyzing trace with hash 617525711, now seen corresponding path program 327 times [2021-02-19 17:26:06,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:06,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713493104] [2021-02-19 17:26:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:06,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713493104] [2021-02-19 17:26:06,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590968450] [2021-02-19 17:26:06,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:06,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:26:06,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:06,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:06,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:06,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:06,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:26:06,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035363100] [2021-02-19 17:26:06,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:26:06,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:06,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:26:06,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:26:06,689 INFO L87 Difference]: Start difference. First operand 17700 states and 52487 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:06,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:06,927 INFO L93 Difference]: Finished difference Result 19005 states and 55535 transitions. [2021-02-19 17:26:06,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:26:06,928 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:06,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:06,950 INFO L225 Difference]: With dead ends: 19005 [2021-02-19 17:26:06,950 INFO L226 Difference]: Without dead ends: 18993 [2021-02-19 17:26:06,951 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:26:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18993 states. [2021-02-19 17:26:07,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18993 to 17700. [2021-02-19 17:26:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17700 states, 17699 states have (on average 2.9653652748742867) internal successors, (52484), 17699 states have internal predecessors, (52484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17700 states to 17700 states and 52484 transitions. [2021-02-19 17:26:07,180 INFO L78 Accepts]: Start accepts. Automaton has 17700 states and 52484 transitions. Word has length 23 [2021-02-19 17:26:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:07,180 INFO L480 AbstractCegarLoop]: Abstraction has 17700 states and 52484 transitions. [2021-02-19 17:26:07,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 17700 states and 52484 transitions. [2021-02-19 17:26:07,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:07,192 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:07,192 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:07,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3336,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:07,393 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:07,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1316718893, now seen corresponding path program 328 times [2021-02-19 17:26:07,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:07,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909302322] [2021-02-19 17:26:07,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:07,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909302322] [2021-02-19 17:26:07,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970736107] [2021-02-19 17:26:07,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:07,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:26:07,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:07,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:07,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:26:07,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:07,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 17:26:07,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567163089] [2021-02-19 17:26:07,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:26:07,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:07,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:26:07,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:26:07,536 INFO L87 Difference]: Start difference. First operand 17700 states and 52484 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:07,647 INFO L93 Difference]: Finished difference Result 18023 states and 52963 transitions. [2021-02-19 17:26:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:26:07,647 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:07,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:07,670 INFO L225 Difference]: With dead ends: 18023 [2021-02-19 17:26:07,670 INFO L226 Difference]: Without dead ends: 18021 [2021-02-19 17:26:07,670 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:26:07,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18021 states. [2021-02-19 17:26:07,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18021 to 17692. [2021-02-19 17:26:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17692 states, 17691 states have (on average 2.9651800350460684) internal successors, (52457), 17691 states have internal predecessors, (52457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:07,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17692 states to 17692 states and 52457 transitions. [2021-02-19 17:26:07,916 INFO L78 Accepts]: Start accepts. Automaton has 17692 states and 52457 transitions. Word has length 23 [2021-02-19 17:26:07,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:07,916 INFO L480 AbstractCegarLoop]: Abstraction has 17692 states and 52457 transitions. [2021-02-19 17:26:07,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:07,916 INFO L276 IsEmpty]: Start isEmpty. Operand 17692 states and 52457 transitions. [2021-02-19 17:26:07,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:07,930 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:07,930 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:08,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3337,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:08,131 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:08,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:08,131 INFO L82 PathProgramCache]: Analyzing trace with hash 428735797, now seen corresponding path program 329 times [2021-02-19 17:26:08,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:08,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108444858] [2021-02-19 17:26:08,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:08,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108444858] [2021-02-19 17:26:08,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283224122] [2021-02-19 17:26:08,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:08,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:26:08,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:08,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:08,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:26:08,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:08,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-02-19 17:26:08,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299735437] [2021-02-19 17:26:08,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:26:08,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:08,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:26:08,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:26:08,267 INFO L87 Difference]: Start difference. First operand 17692 states and 52457 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:08,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:08,381 INFO L93 Difference]: Finished difference Result 17998 states and 52879 transitions. [2021-02-19 17:26:08,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:26:08,382 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:08,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:08,403 INFO L225 Difference]: With dead ends: 17998 [2021-02-19 17:26:08,404 INFO L226 Difference]: Without dead ends: 17998 [2021-02-19 17:26:08,404 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:26:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17998 states. [2021-02-19 17:26:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17998 to 17676. [2021-02-19 17:26:08,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17676 states, 17675 states have (on average 2.9643564356435643) internal successors, (52395), 17675 states have internal predecessors, (52395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17676 states to 17676 states and 52395 transitions. [2021-02-19 17:26:08,642 INFO L78 Accepts]: Start accepts. Automaton has 17676 states and 52395 transitions. Word has length 23 [2021-02-19 17:26:08,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:08,642 INFO L480 AbstractCegarLoop]: Abstraction has 17676 states and 52395 transitions. [2021-02-19 17:26:08,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 17676 states and 52395 transitions. [2021-02-19 17:26:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:08,655 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:08,655 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:08,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3338 [2021-02-19 17:26:08,855 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:08,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2139349105, now seen corresponding path program 330 times [2021-02-19 17:26:08,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:08,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843791104] [2021-02-19 17:26:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:08,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843791104] [2021-02-19 17:26:08,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247841609] [2021-02-19 17:26:08,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:08,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:26:08,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:08,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:08,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:08,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:08,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:26:08,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644420336] [2021-02-19 17:26:08,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:26:08,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:08,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:26:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:26:08,991 INFO L87 Difference]: Start difference. First operand 17676 states and 52395 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:09,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:09,234 INFO L93 Difference]: Finished difference Result 17987 states and 52829 transitions. [2021-02-19 17:26:09,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:26:09,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:09,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:09,254 INFO L225 Difference]: With dead ends: 17987 [2021-02-19 17:26:09,254 INFO L226 Difference]: Without dead ends: 17984 [2021-02-19 17:26:09,254 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:26:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17984 states. [2021-02-19 17:26:09,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17984 to 17667. [2021-02-19 17:26:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17667 states, 17666 states have (on average 2.963036340994) internal successors, (52345), 17666 states have internal predecessors, (52345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:09,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17667 states to 17667 states and 52345 transitions. [2021-02-19 17:26:09,491 INFO L78 Accepts]: Start accepts. Automaton has 17667 states and 52345 transitions. Word has length 23 [2021-02-19 17:26:09,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:09,491 INFO L480 AbstractCegarLoop]: Abstraction has 17667 states and 52345 transitions. [2021-02-19 17:26:09,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:09,491 INFO L276 IsEmpty]: Start isEmpty. Operand 17667 states and 52345 transitions. [2021-02-19 17:26:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:09,504 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:09,504 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:09,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3339,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:09,704 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash -666213195, now seen corresponding path program 331 times [2021-02-19 17:26:09,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:09,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473149733] [2021-02-19 17:26:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:09,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473149733] [2021-02-19 17:26:09,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279339567] [2021-02-19 17:26:09,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:09,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:09,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:09,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:09,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-02-19 17:26:09,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983075292] [2021-02-19 17:26:09,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:26:09,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:09,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:26:09,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:26:09,852 INFO L87 Difference]: Start difference. First operand 17667 states and 52345 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:10,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:10,075 INFO L93 Difference]: Finished difference Result 17982 states and 52786 transitions. [2021-02-19 17:26:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:26:10,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:10,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:10,097 INFO L225 Difference]: With dead ends: 17982 [2021-02-19 17:26:10,097 INFO L226 Difference]: Without dead ends: 17978 [2021-02-19 17:26:10,098 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:26:10,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17978 states. [2021-02-19 17:26:10,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17978 to 17667. [2021-02-19 17:26:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17667 states, 17666 states have (on average 2.9616777991622327) internal successors, (52321), 17666 states have internal predecessors, (52321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17667 states to 17667 states and 52321 transitions. [2021-02-19 17:26:10,341 INFO L78 Accepts]: Start accepts. Automaton has 17667 states and 52321 transitions. Word has length 23 [2021-02-19 17:26:10,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:10,342 INFO L480 AbstractCegarLoop]: Abstraction has 17667 states and 52321 transitions. [2021-02-19 17:26:10,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:10,342 INFO L276 IsEmpty]: Start isEmpty. Operand 17667 states and 52321 transitions. [2021-02-19 17:26:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:10,355 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:10,355 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:10,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3340 [2021-02-19 17:26:10,556 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:10,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:10,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1739298575, now seen corresponding path program 332 times [2021-02-19 17:26:10,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:10,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359099515] [2021-02-19 17:26:10,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:10,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359099515] [2021-02-19 17:26:10,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837200439] [2021-02-19 17:26:10,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:10,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:26:10,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:10,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:10,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:26:10,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:10,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-02-19 17:26:10,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620295349] [2021-02-19 17:26:10,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:26:10,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:10,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:26:10,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:26:10,702 INFO L87 Difference]: Start difference. First operand 17667 states and 52321 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:10,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:10,913 INFO L93 Difference]: Finished difference Result 20030 states and 58396 transitions. [2021-02-19 17:26:10,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:26:10,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:10,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:10,936 INFO L225 Difference]: With dead ends: 20030 [2021-02-19 17:26:10,936 INFO L226 Difference]: Without dead ends: 20024 [2021-02-19 17:26:10,936 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:26:10,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20024 states. [2021-02-19 17:26:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20024 to 17667. [2021-02-19 17:26:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17667 states, 17666 states have (on average 2.9612815577946336) internal successors, (52314), 17666 states have internal predecessors, (52314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17667 states to 17667 states and 52314 transitions. [2021-02-19 17:26:11,176 INFO L78 Accepts]: Start accepts. Automaton has 17667 states and 52314 transitions. Word has length 23 [2021-02-19 17:26:11,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:11,176 INFO L480 AbstractCegarLoop]: Abstraction has 17667 states and 52314 transitions. [2021-02-19 17:26:11,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:11,176 INFO L276 IsEmpty]: Start isEmpty. Operand 17667 states and 52314 transitions. [2021-02-19 17:26:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:11,190 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:11,190 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:11,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-02-19 17:26:11,391 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:11,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:11,391 INFO L82 PathProgramCache]: Analyzing trace with hash -645206987, now seen corresponding path program 333 times [2021-02-19 17:26:11,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:11,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173739599] [2021-02-19 17:26:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:11,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173739599] [2021-02-19 17:26:11,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738383857] [2021-02-19 17:26:11,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:11,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:26:11,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:11,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:11,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:11,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:11,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:26:11,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463094712] [2021-02-19 17:26:11,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:26:11,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:11,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:26:11,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:26:11,548 INFO L87 Difference]: Start difference. First operand 17667 states and 52314 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:11,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:11,798 INFO L93 Difference]: Finished difference Result 20051 states and 58414 transitions. [2021-02-19 17:26:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:26:11,799 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:11,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:11,826 INFO L225 Difference]: With dead ends: 20051 [2021-02-19 17:26:11,826 INFO L226 Difference]: Without dead ends: 20043 [2021-02-19 17:26:11,826 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:26:11,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20043 states. [2021-02-19 17:26:12,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20043 to 17768. [2021-02-19 17:26:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17768 states, 17767 states have (on average 2.962289638093094) internal successors, (52631), 17767 states have internal predecessors, (52631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17768 states to 17768 states and 52631 transitions. [2021-02-19 17:26:12,095 INFO L78 Accepts]: Start accepts. Automaton has 17768 states and 52631 transitions. Word has length 23 [2021-02-19 17:26:12,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:12,095 INFO L480 AbstractCegarLoop]: Abstraction has 17768 states and 52631 transitions. [2021-02-19 17:26:12,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 17768 states and 52631 transitions. [2021-02-19 17:26:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:12,110 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:12,110 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:12,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3342 [2021-02-19 17:26:12,311 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:12,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:12,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1088106127, now seen corresponding path program 334 times [2021-02-19 17:26:12,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:12,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798530223] [2021-02-19 17:26:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:12,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798530223] [2021-02-19 17:26:12,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110051747] [2021-02-19 17:26:12,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:12,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:26:12,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:12,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:12,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:26:12,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:12,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-02-19 17:26:12,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952755396] [2021-02-19 17:26:12,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:26:12,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:12,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:26:12,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:26:12,464 INFO L87 Difference]: Start difference. First operand 17768 states and 52631 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:12,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:12,743 INFO L93 Difference]: Finished difference Result 19811 states and 57686 transitions. [2021-02-19 17:26:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:26:12,744 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:12,770 INFO L225 Difference]: With dead ends: 19811 [2021-02-19 17:26:12,770 INFO L226 Difference]: Without dead ends: 19801 [2021-02-19 17:26:12,770 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:26:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19801 states. [2021-02-19 17:26:13,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19801 to 17768. [2021-02-19 17:26:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17768 states, 17767 states have (on average 2.9621207857263467) internal successors, (52628), 17767 states have internal predecessors, (52628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17768 states to 17768 states and 52628 transitions. [2021-02-19 17:26:13,061 INFO L78 Accepts]: Start accepts. Automaton has 17768 states and 52628 transitions. Word has length 23 [2021-02-19 17:26:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:13,061 INFO L480 AbstractCegarLoop]: Abstraction has 17768 states and 52628 transitions. [2021-02-19 17:26:13,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 17768 states and 52628 transitions. [2021-02-19 17:26:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:13,074 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:13,074 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:13,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3343,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:13,274 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:13,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1933077579, now seen corresponding path program 335 times [2021-02-19 17:26:13,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:13,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739594817] [2021-02-19 17:26:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:13,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739594817] [2021-02-19 17:26:13,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266586566] [2021-02-19 17:26:13,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:13,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:26:13,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:13,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:13,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:13,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:13,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-02-19 17:26:13,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774834622] [2021-02-19 17:26:13,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:26:13,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:13,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:26:13,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:26:13,451 INFO L87 Difference]: Start difference. First operand 17768 states and 52628 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:13,741 INFO L93 Difference]: Finished difference Result 19834 states and 57709 transitions. [2021-02-19 17:26:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:26:13,742 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:13,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:13,767 INFO L225 Difference]: With dead ends: 19834 [2021-02-19 17:26:13,767 INFO L226 Difference]: Without dead ends: 19822 [2021-02-19 17:26:13,768 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:26:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19822 states. [2021-02-19 17:26:13,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19822 to 17777. [2021-02-19 17:26:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17777 states, 17776 states have (on average 2.961971197119712) internal successors, (52652), 17776 states have internal predecessors, (52652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:14,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17777 states to 17777 states and 52652 transitions. [2021-02-19 17:26:14,002 INFO L78 Accepts]: Start accepts. Automaton has 17777 states and 52652 transitions. Word has length 23 [2021-02-19 17:26:14,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:14,002 INFO L480 AbstractCegarLoop]: Abstraction has 17777 states and 52652 transitions. [2021-02-19 17:26:14,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:14,002 INFO L276 IsEmpty]: Start isEmpty. Operand 17777 states and 52652 transitions. [2021-02-19 17:26:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:14,014 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:14,014 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:14,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3344,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:14,215 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:14,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1937578481, now seen corresponding path program 336 times [2021-02-19 17:26:14,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:14,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30927819] [2021-02-19 17:26:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:14,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30927819] [2021-02-19 17:26:14,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686554409] [2021-02-19 17:26:14,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:14,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:26:14,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:14,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:14,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:14,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:14,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:26:14,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437111762] [2021-02-19 17:26:14,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:26:14,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:14,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:26:14,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:26:14,387 INFO L87 Difference]: Start difference. First operand 17777 states and 52652 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:14,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:14,744 INFO L93 Difference]: Finished difference Result 18786 states and 54941 transitions. [2021-02-19 17:26:14,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:26:14,744 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:14,767 INFO L225 Difference]: With dead ends: 18786 [2021-02-19 17:26:14,767 INFO L226 Difference]: Without dead ends: 18772 [2021-02-19 17:26:14,768 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:26:14,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18772 states. [2021-02-19 17:26:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18772 to 17777. [2021-02-19 17:26:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17777 states, 17776 states have (on average 2.9618586858685867) internal successors, (52650), 17776 states have internal predecessors, (52650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17777 states to 17777 states and 52650 transitions. [2021-02-19 17:26:14,986 INFO L78 Accepts]: Start accepts. Automaton has 17777 states and 52650 transitions. Word has length 23 [2021-02-19 17:26:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:14,986 INFO L480 AbstractCegarLoop]: Abstraction has 17777 states and 52650 transitions. [2021-02-19 17:26:14,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 17777 states and 52650 transitions. [2021-02-19 17:26:14,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:15,000 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:15,000 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:15,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3345 [2021-02-19 17:26:15,200 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:15,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:15,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1280379975, now seen corresponding path program 337 times [2021-02-19 17:26:15,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:15,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917786946] [2021-02-19 17:26:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:15,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917786946] [2021-02-19 17:26:15,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223660749] [2021-02-19 17:26:15,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:15,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:15,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:15,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:15,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:26:15,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698627927] [2021-02-19 17:26:15,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:26:15,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:15,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:26:15,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:26:15,361 INFO L87 Difference]: Start difference. First operand 17777 states and 52650 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:15,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:15,578 INFO L93 Difference]: Finished difference Result 17910 states and 52848 transitions. [2021-02-19 17:26:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:26:15,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:15,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:15,602 INFO L225 Difference]: With dead ends: 17910 [2021-02-19 17:26:15,602 INFO L226 Difference]: Without dead ends: 17910 [2021-02-19 17:26:15,602 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:26:15,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17910 states. [2021-02-19 17:26:15,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17910 to 17743. [2021-02-19 17:26:15,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17743 states, 17742 states have (on average 2.961729230075527) internal successors, (52547), 17742 states have internal predecessors, (52547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 52547 transitions. [2021-02-19 17:26:15,834 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 52547 transitions. Word has length 23 [2021-02-19 17:26:15,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:15,834 INFO L480 AbstractCegarLoop]: Abstraction has 17743 states and 52547 transitions. [2021-02-19 17:26:15,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 52547 transitions. [2021-02-19 17:26:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:15,848 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:15,848 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:16,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3346,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:16,049 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:16,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:16,049 INFO L82 PathProgramCache]: Analyzing trace with hash -170106617, now seen corresponding path program 338 times [2021-02-19 17:26:16,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:16,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959687448] [2021-02-19 17:26:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:16,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959687448] [2021-02-19 17:26:16,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535156272] [2021-02-19 17:26:16,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:16,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:26:16,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:16,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:16,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:16,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:16,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-02-19 17:26:16,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439887043] [2021-02-19 17:26:16,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:26:16,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:16,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:26:16,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:26:16,212 INFO L87 Difference]: Start difference. First operand 17743 states and 52547 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:16,476 INFO L93 Difference]: Finished difference Result 18112 states and 53332 transitions. [2021-02-19 17:26:16,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:26:16,476 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:16,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:16,498 INFO L225 Difference]: With dead ends: 18112 [2021-02-19 17:26:16,498 INFO L226 Difference]: Without dead ends: 18100 [2021-02-19 17:26:16,499 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:26:16,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18100 states. [2021-02-19 17:26:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18100 to 17738. [2021-02-19 17:26:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17738 states, 17737 states have (on average 2.960929131194678) internal successors, (52518), 17737 states have internal predecessors, (52518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17738 states to 17738 states and 52518 transitions. [2021-02-19 17:26:16,735 INFO L78 Accepts]: Start accepts. Automaton has 17738 states and 52518 transitions. Word has length 23 [2021-02-19 17:26:16,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:16,735 INFO L480 AbstractCegarLoop]: Abstraction has 17738 states and 52518 transitions. [2021-02-19 17:26:16,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:16,735 INFO L276 IsEmpty]: Start isEmpty. Operand 17738 states and 52518 transitions. [2021-02-19 17:26:16,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:16,749 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:16,749 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:16,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3347 [2021-02-19 17:26:16,949 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:16,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:16,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1768036393, now seen corresponding path program 339 times [2021-02-19 17:26:16,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:16,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184265427] [2021-02-19 17:26:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:17,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184265427] [2021-02-19 17:26:17,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963187219] [2021-02-19 17:26:17,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:17,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:26:17,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:17,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:17,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:17,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:17,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:26:17,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996869229] [2021-02-19 17:26:17,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:26:17,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:17,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:26:17,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:26:17,098 INFO L87 Difference]: Start difference. First operand 17738 states and 52518 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:17,344 INFO L93 Difference]: Finished difference Result 18105 states and 53132 transitions. [2021-02-19 17:26:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:26:17,345 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:17,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:17,370 INFO L225 Difference]: With dead ends: 18105 [2021-02-19 17:26:17,370 INFO L226 Difference]: Without dead ends: 18096 [2021-02-19 17:26:17,370 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:26:17,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18096 states. [2021-02-19 17:26:17,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18096 to 17721. [2021-02-19 17:26:17,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17721 states, 17720 states have (on average 2.959706546275395) internal successors, (52446), 17720 states have internal predecessors, (52446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17721 states to 17721 states and 52446 transitions. [2021-02-19 17:26:17,614 INFO L78 Accepts]: Start accepts. Automaton has 17721 states and 52446 transitions. Word has length 23 [2021-02-19 17:26:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:17,614 INFO L480 AbstractCegarLoop]: Abstraction has 17721 states and 52446 transitions. [2021-02-19 17:26:17,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 17721 states and 52446 transitions. [2021-02-19 17:26:17,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:17,628 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:17,628 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:17,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3348,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:17,828 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:17,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:17,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1432839315, now seen corresponding path program 340 times [2021-02-19 17:26:17,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:17,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035271287] [2021-02-19 17:26:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:17,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035271287] [2021-02-19 17:26:17,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400958727] [2021-02-19 17:26:17,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:17,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:26:17,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:17,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:17,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:17,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:17,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-02-19 17:26:17,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245921416] [2021-02-19 17:26:17,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:26:17,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:17,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:26:17,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:26:17,982 INFO L87 Difference]: Start difference. First operand 17721 states and 52446 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:18,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:18,214 INFO L93 Difference]: Finished difference Result 18100 states and 53078 transitions. [2021-02-19 17:26:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:26:18,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:18,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:18,236 INFO L225 Difference]: With dead ends: 18100 [2021-02-19 17:26:18,237 INFO L226 Difference]: Without dead ends: 18092 [2021-02-19 17:26:18,237 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:26:18,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18092 states. [2021-02-19 17:26:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18092 to 17739. [2021-02-19 17:26:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17739 states, 17738 states have (on average 2.9584507836283684) internal successors, (52477), 17738 states have internal predecessors, (52477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17739 states to 17739 states and 52477 transitions. [2021-02-19 17:26:18,488 INFO L78 Accepts]: Start accepts. Automaton has 17739 states and 52477 transitions. Word has length 23 [2021-02-19 17:26:18,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:18,488 INFO L480 AbstractCegarLoop]: Abstraction has 17739 states and 52477 transitions. [2021-02-19 17:26:18,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:18,488 INFO L276 IsEmpty]: Start isEmpty. Operand 17739 states and 52477 transitions. [2021-02-19 17:26:18,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:18,500 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:18,500 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:18,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:18,701 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:18,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1875738455, now seen corresponding path program 341 times [2021-02-19 17:26:18,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:18,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999382730] [2021-02-19 17:26:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:18,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999382730] [2021-02-19 17:26:18,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676579203] [2021-02-19 17:26:18,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:18,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:26:18,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:18,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:18,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:26:18,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:18,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-02-19 17:26:18,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358596029] [2021-02-19 17:26:18,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:26:18,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:18,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:26:18,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:26:18,861 INFO L87 Difference]: Start difference. First operand 17739 states and 52477 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:19,125 INFO L93 Difference]: Finished difference Result 19772 states and 57327 transitions. [2021-02-19 17:26:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:26:19,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:19,147 INFO L225 Difference]: With dead ends: 19772 [2021-02-19 17:26:19,147 INFO L226 Difference]: Without dead ends: 19762 [2021-02-19 17:26:19,147 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:26:19,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19762 states. [2021-02-19 17:26:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19762 to 17788. [2021-02-19 17:26:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17788 states, 17787 states have (on average 2.9577781525833475) internal successors, (52610), 17787 states have internal predecessors, (52610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17788 states to 17788 states and 52610 transitions. [2021-02-19 17:26:19,378 INFO L78 Accepts]: Start accepts. Automaton has 17788 states and 52610 transitions. Word has length 23 [2021-02-19 17:26:19,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:19,378 INFO L480 AbstractCegarLoop]: Abstraction has 17788 states and 52610 transitions. [2021-02-19 17:26:19,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:19,378 INFO L276 IsEmpty]: Start isEmpty. Operand 17788 states and 52610 transitions. [2021-02-19 17:26:19,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:19,392 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:19,392 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:19,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3350 [2021-02-19 17:26:19,593 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:19,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:19,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1574257389, now seen corresponding path program 342 times [2021-02-19 17:26:19,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:19,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250062657] [2021-02-19 17:26:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:19,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250062657] [2021-02-19 17:26:19,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308038824] [2021-02-19 17:26:19,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:19,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:26:19,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:19,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:19,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:19,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:19,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:26:19,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404851176] [2021-02-19 17:26:19,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:26:19,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:19,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:26:19,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:26:19,759 INFO L87 Difference]: Start difference. First operand 17788 states and 52610 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:20,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:20,034 INFO L93 Difference]: Finished difference Result 19792 states and 57341 transitions. [2021-02-19 17:26:20,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:26:20,034 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:20,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:20,058 INFO L225 Difference]: With dead ends: 19792 [2021-02-19 17:26:20,058 INFO L226 Difference]: Without dead ends: 19780 [2021-02-19 17:26:20,059 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=298, Invalid=632, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:26:20,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19780 states. [2021-02-19 17:26:20,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19780 to 17832. [2021-02-19 17:26:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17832 states, 17831 states have (on average 2.9570971902865795) internal successors, (52728), 17831 states have internal predecessors, (52728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:20,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17832 states to 17832 states and 52728 transitions. [2021-02-19 17:26:20,302 INFO L78 Accepts]: Start accepts. Automaton has 17832 states and 52728 transitions. Word has length 23 [2021-02-19 17:26:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:20,302 INFO L480 AbstractCegarLoop]: Abstraction has 17832 states and 52728 transitions. [2021-02-19 17:26:20,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:20,302 INFO L276 IsEmpty]: Start isEmpty. Operand 17832 states and 52728 transitions. [2021-02-19 17:26:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:20,315 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:20,315 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:20,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3351,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:20,515 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:20,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:20,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1149946153, now seen corresponding path program 343 times [2021-02-19 17:26:20,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:20,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633965678] [2021-02-19 17:26:20,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:20,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633965678] [2021-02-19 17:26:20,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344721582] [2021-02-19 17:26:20,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:20,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:20,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:20,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:20,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-02-19 17:26:20,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070265099] [2021-02-19 17:26:20,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:26:20,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:20,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:26:20,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:26:20,685 INFO L87 Difference]: Start difference. First operand 17832 states and 52728 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:21,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:21,026 INFO L93 Difference]: Finished difference Result 19221 states and 55887 transitions. [2021-02-19 17:26:21,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:26:21,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:21,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:21,050 INFO L225 Difference]: With dead ends: 19221 [2021-02-19 17:26:21,050 INFO L226 Difference]: Without dead ends: 19207 [2021-02-19 17:26:21,050 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:26:21,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19207 states. [2021-02-19 17:26:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19207 to 17832. [2021-02-19 17:26:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17832 states, 17831 states have (on average 2.956816779765577) internal successors, (52723), 17831 states have internal predecessors, (52723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17832 states to 17832 states and 52723 transitions. [2021-02-19 17:26:21,327 INFO L78 Accepts]: Start accepts. Automaton has 17832 states and 52723 transitions. Word has length 23 [2021-02-19 17:26:21,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:21,327 INFO L480 AbstractCegarLoop]: Abstraction has 17832 states and 52723 transitions. [2021-02-19 17:26:21,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 17832 states and 52723 transitions. [2021-02-19 17:26:21,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:21,340 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:21,340 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:21,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3352 [2021-02-19 17:26:21,541 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:21,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:21,541 INFO L82 PathProgramCache]: Analyzing trace with hash 905964005, now seen corresponding path program 344 times [2021-02-19 17:26:21,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:21,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160528046] [2021-02-19 17:26:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:21,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160528046] [2021-02-19 17:26:21,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301364321] [2021-02-19 17:26:21,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:21,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:26:21,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:21,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:21,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:26:21,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303245349] [2021-02-19 17:26:21,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:26:21,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:21,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:26:21,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:26:21,689 INFO L87 Difference]: Start difference. First operand 17832 states and 52723 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:21,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:21,863 INFO L93 Difference]: Finished difference Result 18113 states and 53138 transitions. [2021-02-19 17:26:21,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:26:21,863 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:21,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:21,883 INFO L225 Difference]: With dead ends: 18113 [2021-02-19 17:26:21,883 INFO L226 Difference]: Without dead ends: 18109 [2021-02-19 17:26:21,883 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:26:21,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18109 states. [2021-02-19 17:26:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18109 to 17796. [2021-02-19 17:26:22,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17796 states, 17795 states have (on average 2.95605507164934) internal successors, (52603), 17795 states have internal predecessors, (52603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17796 states to 17796 states and 52603 transitions. [2021-02-19 17:26:22,121 INFO L78 Accepts]: Start accepts. Automaton has 17796 states and 52603 transitions. Word has length 23 [2021-02-19 17:26:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:22,121 INFO L480 AbstractCegarLoop]: Abstraction has 17796 states and 52603 transitions. [2021-02-19 17:26:22,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:22,121 INFO L276 IsEmpty]: Start isEmpty. Operand 17796 states and 52603 transitions. [2021-02-19 17:26:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:22,135 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:22,135 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:22,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3353 [2021-02-19 17:26:22,336 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:22,336 INFO L82 PathProgramCache]: Analyzing trace with hash -336950013, now seen corresponding path program 345 times [2021-02-19 17:26:22,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:22,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411253265] [2021-02-19 17:26:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:22,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411253265] [2021-02-19 17:26:22,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762217322] [2021-02-19 17:26:22,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:22,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:26:22,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:22,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:22,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:22,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:22,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:26:22,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901044688] [2021-02-19 17:26:22,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:26:22,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:22,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:26:22,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:26:22,502 INFO L87 Difference]: Start difference. First operand 17796 states and 52603 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:22,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:22,772 INFO L93 Difference]: Finished difference Result 18188 states and 53248 transitions. [2021-02-19 17:26:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:26:22,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:22,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:22,796 INFO L225 Difference]: With dead ends: 18188 [2021-02-19 17:26:22,797 INFO L226 Difference]: Without dead ends: 18173 [2021-02-19 17:26:22,797 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:26:22,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18173 states. [2021-02-19 17:26:22,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18173 to 17743. [2021-02-19 17:26:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17743 states, 17742 states have (on average 2.9541765302671625) internal successors, (52413), 17742 states have internal predecessors, (52413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 52413 transitions. [2021-02-19 17:26:23,032 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 52413 transitions. Word has length 23 [2021-02-19 17:26:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:23,032 INFO L480 AbstractCegarLoop]: Abstraction has 17743 states and 52413 transitions. [2021-02-19 17:26:23,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 52413 transitions. [2021-02-19 17:26:23,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:23,045 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:23,045 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:23,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:23,245 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:23,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:23,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1181921465, now seen corresponding path program 346 times [2021-02-19 17:26:23,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:23,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349306970] [2021-02-19 17:26:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:23,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349306970] [2021-02-19 17:26:23,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756738828] [2021-02-19 17:26:23,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:23,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:26:23,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:23,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:23,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:23,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:23,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-02-19 17:26:23,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939524162] [2021-02-19 17:26:23,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:26:23,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:23,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:26:23,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:26:23,418 INFO L87 Difference]: Start difference. First operand 17743 states and 52413 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:23,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:23,687 INFO L93 Difference]: Finished difference Result 18140 states and 53067 transitions. [2021-02-19 17:26:23,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:26:23,687 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:23,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:23,709 INFO L225 Difference]: With dead ends: 18140 [2021-02-19 17:26:23,709 INFO L226 Difference]: Without dead ends: 18128 [2021-02-19 17:26:23,709 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:26:23,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18128 states. [2021-02-19 17:26:23,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18128 to 17714. [2021-02-19 17:26:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17714 states, 17713 states have (on average 2.952520747473607) internal successors, (52298), 17713 states have internal predecessors, (52298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17714 states to 17714 states and 52298 transitions. [2021-02-19 17:26:23,952 INFO L78 Accepts]: Start accepts. Automaton has 17714 states and 52298 transitions. Word has length 23 [2021-02-19 17:26:23,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:23,952 INFO L480 AbstractCegarLoop]: Abstraction has 17714 states and 52298 transitions. [2021-02-19 17:26:23,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 17714 states and 52298 transitions. [2021-02-19 17:26:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:23,966 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:23,967 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:24,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3355,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:24,167 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:24,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:24,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1606232701, now seen corresponding path program 347 times [2021-02-19 17:26:24,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:24,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357153373] [2021-02-19 17:26:24,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:24,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357153373] [2021-02-19 17:26:24,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728758889] [2021-02-19 17:26:24,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:24,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:26:24,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:24,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:24,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:24,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:24,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-02-19 17:26:24,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268604129] [2021-02-19 17:26:24,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:26:24,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:24,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:26:24,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:26:24,346 INFO L87 Difference]: Start difference. First operand 17714 states and 52298 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:24,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:24,675 INFO L93 Difference]: Finished difference Result 18638 states and 54418 transitions. [2021-02-19 17:26:24,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:26:24,676 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:24,697 INFO L225 Difference]: With dead ends: 18638 [2021-02-19 17:26:24,697 INFO L226 Difference]: Without dead ends: 18624 [2021-02-19 17:26:24,697 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:26:24,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18624 states. [2021-02-19 17:26:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18624 to 17715. [2021-02-19 17:26:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17715 states, 17714 states have (on average 2.9520718076098) internal successors, (52293), 17714 states have internal predecessors, (52293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17715 states to 17715 states and 52293 transitions. [2021-02-19 17:26:24,937 INFO L78 Accepts]: Start accepts. Automaton has 17715 states and 52293 transitions. Word has length 23 [2021-02-19 17:26:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:24,937 INFO L480 AbstractCegarLoop]: Abstraction has 17715 states and 52293 transitions. [2021-02-19 17:26:24,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:24,937 INFO L276 IsEmpty]: Start isEmpty. Operand 17715 states and 52293 transitions. [2021-02-19 17:26:24,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:24,950 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:24,950 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:25,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3356,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:25,151 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:25,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:25,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1448075399, now seen corresponding path program 348 times [2021-02-19 17:26:25,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:25,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543650714] [2021-02-19 17:26:25,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:25,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543650714] [2021-02-19 17:26:25,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958249107] [2021-02-19 17:26:25,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:25,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:26:25,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:25,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:25,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:25,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:25,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:26:25,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965493945] [2021-02-19 17:26:25,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:26:25,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:25,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:26:25,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:26:25,396 INFO L87 Difference]: Start difference. First operand 17715 states and 52293 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:25,527 INFO L93 Difference]: Finished difference Result 18082 states and 52864 transitions. [2021-02-19 17:26:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:26:25,528 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:25,550 INFO L225 Difference]: With dead ends: 18082 [2021-02-19 17:26:25,550 INFO L226 Difference]: Without dead ends: 18082 [2021-02-19 17:26:25,550 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:26:25,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18082 states. [2021-02-19 17:26:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18082 to 17718. [2021-02-19 17:26:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17718 states, 17717 states have (on average 2.9520799232375685) internal successors, (52302), 17717 states have internal predecessors, (52302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17718 states to 17718 states and 52302 transitions. [2021-02-19 17:26:25,788 INFO L78 Accepts]: Start accepts. Automaton has 17718 states and 52302 transitions. Word has length 23 [2021-02-19 17:26:25,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:25,788 INFO L480 AbstractCegarLoop]: Abstraction has 17718 states and 52302 transitions. [2021-02-19 17:26:25,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:25,788 INFO L276 IsEmpty]: Start isEmpty. Operand 17718 states and 52302 transitions. [2021-02-19 17:26:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:25,801 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:25,801 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:26,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3357 [2021-02-19 17:26:26,001 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:26,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:26,002 INFO L82 PathProgramCache]: Analyzing trace with hash -309668375, now seen corresponding path program 349 times [2021-02-19 17:26:26,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:26,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269186595] [2021-02-19 17:26:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:26,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269186595] [2021-02-19 17:26:26,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614065886] [2021-02-19 17:26:26,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:26,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:26,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:26,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:26,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-02-19 17:26:26,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835936685] [2021-02-19 17:26:26,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:26:26,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:26,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:26:26,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:26:26,180 INFO L87 Difference]: Start difference. First operand 17718 states and 52302 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:26,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:26,441 INFO L93 Difference]: Finished difference Result 19394 states and 56286 transitions. [2021-02-19 17:26:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:26:26,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:26,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:26,464 INFO L225 Difference]: With dead ends: 19394 [2021-02-19 17:26:26,464 INFO L226 Difference]: Without dead ends: 19380 [2021-02-19 17:26:26,465 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:26:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19380 states. [2021-02-19 17:26:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19380 to 17749. [2021-02-19 17:26:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.950755014649538) internal successors, (52370), 17748 states have internal predecessors, (52370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52370 transitions. [2021-02-19 17:26:26,695 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52370 transitions. Word has length 23 [2021-02-19 17:26:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:26,695 INFO L480 AbstractCegarLoop]: Abstraction has 17749 states and 52370 transitions. [2021-02-19 17:26:26,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:26,695 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52370 transitions. [2021-02-19 17:26:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:26,709 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:26,709 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:26,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3358,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:26,909 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:26,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:26,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1028289115, now seen corresponding path program 350 times [2021-02-19 17:26:26,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:26,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089860884] [2021-02-19 17:26:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:26,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089860884] [2021-02-19 17:26:26,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094589947] [2021-02-19 17:26:26,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:26,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:26:26,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:26,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:26,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:26:27,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:27,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-02-19 17:26:27,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034380180] [2021-02-19 17:26:27,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:26:27,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:27,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:26:27,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:26:27,042 INFO L87 Difference]: Start difference. First operand 17749 states and 52370 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:27,164 INFO L93 Difference]: Finished difference Result 18176 states and 53023 transitions. [2021-02-19 17:26:27,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:26:27,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:27,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:27,187 INFO L225 Difference]: With dead ends: 18176 [2021-02-19 17:26:27,187 INFO L226 Difference]: Without dead ends: 18176 [2021-02-19 17:26:27,187 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:26:27,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18176 states. [2021-02-19 17:26:27,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18176 to 17758. [2021-02-19 17:26:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17758 states, 17757 states have (on average 2.951117869009405) internal successors, (52403), 17757 states have internal predecessors, (52403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17758 states to 17758 states and 52403 transitions. [2021-02-19 17:26:27,425 INFO L78 Accepts]: Start accepts. Automaton has 17758 states and 52403 transitions. Word has length 23 [2021-02-19 17:26:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:27,425 INFO L480 AbstractCegarLoop]: Abstraction has 17758 states and 52403 transitions. [2021-02-19 17:26:27,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:27,425 INFO L276 IsEmpty]: Start isEmpty. Operand 17758 states and 52403 transitions. [2021-02-19 17:26:27,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:27,438 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:27,438 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:27,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3359,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:27,638 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:27,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:27,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1867188413, now seen corresponding path program 351 times [2021-02-19 17:26:27,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:27,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370629101] [2021-02-19 17:26:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:27,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370629101] [2021-02-19 17:26:27,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140541985] [2021-02-19 17:26:27,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:27,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:26:27,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:27,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:27,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:27,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:26:27,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455013426] [2021-02-19 17:26:27,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:26:27,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:27,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:26:27,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:26:27,774 INFO L87 Difference]: Start difference. First operand 17758 states and 52403 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:27,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:27,983 INFO L93 Difference]: Finished difference Result 18096 states and 52863 transitions. [2021-02-19 17:26:27,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:26:27,984 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:27,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:28,006 INFO L225 Difference]: With dead ends: 18096 [2021-02-19 17:26:28,007 INFO L226 Difference]: Without dead ends: 18094 [2021-02-19 17:26:28,007 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:26:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18094 states. [2021-02-19 17:26:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18094 to 17758. [2021-02-19 17:26:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17758 states, 17757 states have (on average 2.9507799740947234) internal successors, (52397), 17757 states have internal predecessors, (52397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17758 states to 17758 states and 52397 transitions. [2021-02-19 17:26:28,234 INFO L78 Accepts]: Start accepts. Automaton has 17758 states and 52397 transitions. Word has length 23 [2021-02-19 17:26:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:28,234 INFO L480 AbstractCegarLoop]: Abstraction has 17758 states and 52397 transitions. [2021-02-19 17:26:28,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 17758 states and 52397 transitions. [2021-02-19 17:26:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:28,247 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:28,247 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:28,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3360 [2021-02-19 17:26:28,447 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:28,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:28,447 INFO L82 PathProgramCache]: Analyzing trace with hash -377783417, now seen corresponding path program 352 times [2021-02-19 17:26:28,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:28,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102560865] [2021-02-19 17:26:28,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:28,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102560865] [2021-02-19 17:26:28,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775268693] [2021-02-19 17:26:28,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:28,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:26:28,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:28,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:28,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:26:28,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:28,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-02-19 17:26:28,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255755012] [2021-02-19 17:26:28,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:26:28,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:28,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:26:28,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:26:28,590 INFO L87 Difference]: Start difference. First operand 17758 states and 52397 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:28,804 INFO L93 Difference]: Finished difference Result 18102 states and 52865 transitions. [2021-02-19 17:26:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:26:28,805 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:28,826 INFO L225 Difference]: With dead ends: 18102 [2021-02-19 17:26:28,826 INFO L226 Difference]: Without dead ends: 18098 [2021-02-19 17:26:28,827 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:26:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18098 states. [2021-02-19 17:26:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18098 to 17758. [2021-02-19 17:26:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17758 states, 17757 states have (on average 2.9497662893506784) internal successors, (52379), 17757 states have internal predecessors, (52379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17758 states to 17758 states and 52379 transitions. [2021-02-19 17:26:29,109 INFO L78 Accepts]: Start accepts. Automaton has 17758 states and 52379 transitions. Word has length 23 [2021-02-19 17:26:29,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:29,110 INFO L480 AbstractCegarLoop]: Abstraction has 17758 states and 52379 transitions. [2021-02-19 17:26:29,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:29,110 INFO L276 IsEmpty]: Start isEmpty. Operand 17758 states and 52379 transitions. [2021-02-19 17:26:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:29,122 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:29,122 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:29,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3361,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:29,323 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:29,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:29,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1450868797, now seen corresponding path program 353 times [2021-02-19 17:26:29,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:29,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592788910] [2021-02-19 17:26:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:29,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592788910] [2021-02-19 17:26:29,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762337908] [2021-02-19 17:26:29,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:29,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:26:29,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:29,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:29,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:29,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:29,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-02-19 17:26:29,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189309071] [2021-02-19 17:26:29,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:26:29,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:29,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:26:29,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:26:29,474 INFO L87 Difference]: Start difference. First operand 17758 states and 52379 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:29,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:29,719 INFO L93 Difference]: Finished difference Result 18111 states and 52860 transitions. [2021-02-19 17:26:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:26:29,719 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:29,741 INFO L225 Difference]: With dead ends: 18111 [2021-02-19 17:26:29,741 INFO L226 Difference]: Without dead ends: 18105 [2021-02-19 17:26:29,741 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:26:29,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18105 states. [2021-02-19 17:26:29,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18105 to 17758. [2021-02-19 17:26:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17758 states, 17757 states have (on average 2.948245762234612) internal successors, (52352), 17757 states have internal predecessors, (52352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17758 states to 17758 states and 52352 transitions. [2021-02-19 17:26:29,982 INFO L78 Accepts]: Start accepts. Automaton has 17758 states and 52352 transitions. Word has length 23 [2021-02-19 17:26:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:29,982 INFO L480 AbstractCegarLoop]: Abstraction has 17758 states and 52352 transitions. [2021-02-19 17:26:29,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:29,982 INFO L276 IsEmpty]: Start isEmpty. Operand 17758 states and 52352 transitions. [2021-02-19 17:26:29,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:29,995 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:29,995 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:30,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3362 [2021-02-19 17:26:30,196 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:30,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:30,196 INFO L82 PathProgramCache]: Analyzing trace with hash -356777209, now seen corresponding path program 354 times [2021-02-19 17:26:30,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:30,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501500217] [2021-02-19 17:26:30,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:30,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501500217] [2021-02-19 17:26:30,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709719856] [2021-02-19 17:26:30,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:30,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:26:30,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:30,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:30,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:30,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:30,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:26:30,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065473474] [2021-02-19 17:26:30,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:26:30,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:30,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:26:30,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:26:30,352 INFO L87 Difference]: Start difference. First operand 17758 states and 52352 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:30,616 INFO L93 Difference]: Finished difference Result 20622 states and 59742 transitions. [2021-02-19 17:26:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:26:30,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:30,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:30,640 INFO L225 Difference]: With dead ends: 20622 [2021-02-19 17:26:30,641 INFO L226 Difference]: Without dead ends: 20614 [2021-02-19 17:26:30,641 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:26:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20614 states. [2021-02-19 17:26:30,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20614 to 17782. [2021-02-19 17:26:30,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17782 states, 17781 states have (on average 2.9480344187615994) internal successors, (52419), 17781 states have internal predecessors, (52419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17782 states to 17782 states and 52419 transitions. [2021-02-19 17:26:30,899 INFO L78 Accepts]: Start accepts. Automaton has 17782 states and 52419 transitions. Word has length 23 [2021-02-19 17:26:30,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:30,899 INFO L480 AbstractCegarLoop]: Abstraction has 17782 states and 52419 transitions. [2021-02-19 17:26:30,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:30,899 INFO L276 IsEmpty]: Start isEmpty. Operand 17782 states and 52419 transitions. [2021-02-19 17:26:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:30,913 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:30,914 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:31,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3363 [2021-02-19 17:26:31,114 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:31,114 INFO L82 PathProgramCache]: Analyzing trace with hash -799676349, now seen corresponding path program 355 times [2021-02-19 17:26:31,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:31,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706244903] [2021-02-19 17:26:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:31,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706244903] [2021-02-19 17:26:31,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465959616] [2021-02-19 17:26:31,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:31,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:31,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:31,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:31,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-02-19 17:26:31,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030147169] [2021-02-19 17:26:31,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:26:31,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:31,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:26:31,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:26:31,275 INFO L87 Difference]: Start difference. First operand 17782 states and 52419 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:31,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:31,534 INFO L93 Difference]: Finished difference Result 20649 states and 59769 transitions. [2021-02-19 17:26:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:26:31,534 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:31,559 INFO L225 Difference]: With dead ends: 20649 [2021-02-19 17:26:31,560 INFO L226 Difference]: Without dead ends: 20639 [2021-02-19 17:26:31,560 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:26:31,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20639 states. [2021-02-19 17:26:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20639 to 17904. [2021-02-19 17:26:31,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17904 states, 17903 states have (on average 2.9482768251131097) internal successors, (52783), 17903 states have internal predecessors, (52783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17904 states to 17904 states and 52783 transitions. [2021-02-19 17:26:31,814 INFO L78 Accepts]: Start accepts. Automaton has 17904 states and 52783 transitions. Word has length 23 [2021-02-19 17:26:31,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:31,814 INFO L480 AbstractCegarLoop]: Abstraction has 17904 states and 52783 transitions. [2021-02-19 17:26:31,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 17904 states and 52783 transitions. [2021-02-19 17:26:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:31,827 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:31,827 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:32,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3364 [2021-02-19 17:26:32,028 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:32,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:32,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1644647801, now seen corresponding path program 356 times [2021-02-19 17:26:32,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:32,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708261452] [2021-02-19 17:26:32,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:32,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708261452] [2021-02-19 17:26:32,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35587750] [2021-02-19 17:26:32,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:32,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:26:32,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:32,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:32,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:26:32,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:32,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-02-19 17:26:32,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901448323] [2021-02-19 17:26:32,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:26:32,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:32,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:26:32,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:26:32,197 INFO L87 Difference]: Start difference. First operand 17904 states and 52783 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:32,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:32,495 INFO L93 Difference]: Finished difference Result 20541 states and 59384 transitions. [2021-02-19 17:26:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:26:32,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:32,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:32,519 INFO L225 Difference]: With dead ends: 20541 [2021-02-19 17:26:32,519 INFO L226 Difference]: Without dead ends: 20529 [2021-02-19 17:26:32,519 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:26:32,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20529 states. [2021-02-19 17:26:32,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20529 to 17912. [2021-02-19 17:26:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17912 states, 17911 states have (on average 2.94807660097147) internal successors, (52803), 17911 states have internal predecessors, (52803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17912 states to 17912 states and 52803 transitions. [2021-02-19 17:26:32,847 INFO L78 Accepts]: Start accepts. Automaton has 17912 states and 52803 transitions. Word has length 23 [2021-02-19 17:26:32,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:32,847 INFO L480 AbstractCegarLoop]: Abstraction has 17912 states and 52803 transitions. [2021-02-19 17:26:32,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 17912 states and 52803 transitions. [2021-02-19 17:26:32,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:32,862 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:32,862 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:33,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:33,063 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:33,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:33,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2068959037, now seen corresponding path program 357 times [2021-02-19 17:26:33,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:33,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389377443] [2021-02-19 17:26:33,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:33,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389377443] [2021-02-19 17:26:33,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123655611] [2021-02-19 17:26:33,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:33,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:26:33,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:33,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:33,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:33,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:33,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-02-19 17:26:33,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194883113] [2021-02-19 17:26:33,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:26:33,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:33,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:26:33,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:26:33,244 INFO L87 Difference]: Start difference. First operand 17912 states and 52803 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:33,575 INFO L93 Difference]: Finished difference Result 20574 states and 59419 transitions. [2021-02-19 17:26:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:26:33,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:33,603 INFO L225 Difference]: With dead ends: 20574 [2021-02-19 17:26:33,603 INFO L226 Difference]: Without dead ends: 20560 [2021-02-19 17:26:33,603 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:26:33,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20560 states. [2021-02-19 17:26:33,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20560 to 17931. [2021-02-19 17:26:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17931 states, 17930 states have (on average 2.9476296709425545) internal successors, (52851), 17930 states have internal predecessors, (52851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17931 states to 17931 states and 52851 transitions. [2021-02-19 17:26:33,846 INFO L78 Accepts]: Start accepts. Automaton has 17931 states and 52851 transitions. Word has length 23 [2021-02-19 17:26:33,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:33,846 INFO L480 AbstractCegarLoop]: Abstraction has 17931 states and 52851 transitions. [2021-02-19 17:26:33,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:33,847 INFO L276 IsEmpty]: Start isEmpty. Operand 17931 states and 52851 transitions. [2021-02-19 17:26:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:33,861 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:33,861 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:34,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3366,359 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:34,061 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:34,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:34,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1957261831, now seen corresponding path program 358 times [2021-02-19 17:26:34,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:34,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524997859] [2021-02-19 17:26:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:34,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524997859] [2021-02-19 17:26:34,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664440502] [2021-02-19 17:26:34,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:34,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:26:34,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:34,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:34,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:34,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:34,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-02-19 17:26:34,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474871164] [2021-02-19 17:26:34,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:26:34,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:34,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:26:34,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:26:34,244 INFO L87 Difference]: Start difference. First operand 17931 states and 52851 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:34,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:34,679 INFO L93 Difference]: Finished difference Result 19481 states and 56432 transitions. [2021-02-19 17:26:34,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:26:34,680 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:34,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:34,702 INFO L225 Difference]: With dead ends: 19481 [2021-02-19 17:26:34,703 INFO L226 Difference]: Without dead ends: 19465 [2021-02-19 17:26:34,703 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 17:26:34,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19465 states. [2021-02-19 17:26:34,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19465 to 17933. [2021-02-19 17:26:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17933 states, 17932 states have (on average 2.9473009145661386) internal successors, (52851), 17932 states have internal predecessors, (52851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:34,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17933 states to 17933 states and 52851 transitions. [2021-02-19 17:26:34,949 INFO L78 Accepts]: Start accepts. Automaton has 17933 states and 52851 transitions. Word has length 23 [2021-02-19 17:26:34,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:34,949 INFO L480 AbstractCegarLoop]: Abstraction has 17933 states and 52851 transitions. [2021-02-19 17:26:34,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:34,949 INFO L276 IsEmpty]: Start isEmpty. Operand 17933 states and 52851 transitions. [2021-02-19 17:26:34,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:34,963 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:34,963 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:35,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:35,164 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:35,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:35,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1661385713, now seen corresponding path program 359 times [2021-02-19 17:26:35,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:35,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541784816] [2021-02-19 17:26:35,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:35,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541784816] [2021-02-19 17:26:35,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456207267] [2021-02-19 17:26:35,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:35,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:26:35,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:35,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:35,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:35,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:35,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 21 [2021-02-19 17:26:35,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241187710] [2021-02-19 17:26:35,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:26:35,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:35,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:26:35,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:26:35,389 INFO L87 Difference]: Start difference. First operand 17933 states and 52851 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:35,657 INFO L93 Difference]: Finished difference Result 18197 states and 53278 transitions. [2021-02-19 17:26:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:26:35,658 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:35,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:35,683 INFO L225 Difference]: With dead ends: 18197 [2021-02-19 17:26:35,683 INFO L226 Difference]: Without dead ends: 18191 [2021-02-19 17:26:35,683 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:26:35,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18191 states. [2021-02-19 17:26:35,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18191 to 17928. [2021-02-19 17:26:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17928 states, 17927 states have (on average 2.9467841802867185) internal successors, (52827), 17927 states have internal predecessors, (52827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17928 states to 17928 states and 52827 transitions. [2021-02-19 17:26:35,924 INFO L78 Accepts]: Start accepts. Automaton has 17928 states and 52827 transitions. Word has length 23 [2021-02-19 17:26:35,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:35,924 INFO L480 AbstractCegarLoop]: Abstraction has 17928 states and 52827 transitions. [2021-02-19 17:26:35,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:35,924 INFO L276 IsEmpty]: Start isEmpty. Operand 17928 states and 52827 transitions. [2021-02-19 17:26:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:35,939 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:35,939 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:36,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3368,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:36,139 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:36,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1043533233, now seen corresponding path program 360 times [2021-02-19 17:26:36,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:36,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505550000] [2021-02-19 17:26:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:36,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505550000] [2021-02-19 17:26:36,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607357946] [2021-02-19 17:26:36,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:36,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:26:36,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:36,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:36,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:36,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:36,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-02-19 17:26:36,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974338456] [2021-02-19 17:26:36,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:26:36,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:36,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:26:36,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:26:36,331 INFO L87 Difference]: Start difference. First operand 17928 states and 52827 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:36,625 INFO L93 Difference]: Finished difference Result 18326 states and 53661 transitions. [2021-02-19 17:26:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:26:36,626 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:36,650 INFO L225 Difference]: With dead ends: 18326 [2021-02-19 17:26:36,650 INFO L226 Difference]: Without dead ends: 18312 [2021-02-19 17:26:36,650 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:26:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18312 states. [2021-02-19 17:26:36,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18312 to 17924. [2021-02-19 17:26:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17924 states, 17923 states have (on average 2.946046978742398) internal successors, (52802), 17923 states have internal predecessors, (52802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17924 states to 17924 states and 52802 transitions. [2021-02-19 17:26:36,978 INFO L78 Accepts]: Start accepts. Automaton has 17924 states and 52802 transitions. Word has length 23 [2021-02-19 17:26:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:36,978 INFO L480 AbstractCegarLoop]: Abstraction has 17924 states and 52802 transitions. [2021-02-19 17:26:36,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 17924 states and 52802 transitions. [2021-02-19 17:26:36,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:36,992 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:36,992 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:37,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3369,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:37,193 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:37,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:37,193 INFO L82 PathProgramCache]: Analyzing trace with hash 996424399, now seen corresponding path program 361 times [2021-02-19 17:26:37,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:37,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986581057] [2021-02-19 17:26:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:37,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986581057] [2021-02-19 17:26:37,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586650680] [2021-02-19 17:26:37,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:37,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:37,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:26:37,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:37,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2021-02-19 17:26:37,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479790557] [2021-02-19 17:26:37,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:26:37,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:37,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:26:37,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:26:37,354 INFO L87 Difference]: Start difference. First operand 17924 states and 52802 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:37,598 INFO L93 Difference]: Finished difference Result 18358 states and 53560 transitions. [2021-02-19 17:26:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:26:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:37,619 INFO L225 Difference]: With dead ends: 18358 [2021-02-19 17:26:37,620 INFO L226 Difference]: Without dead ends: 18350 [2021-02-19 17:26:37,620 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:26:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18350 states. [2021-02-19 17:26:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18350 to 17924. [2021-02-19 17:26:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17924 states, 17923 states have (on average 2.9448195056631143) internal successors, (52780), 17923 states have internal predecessors, (52780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17924 states to 17924 states and 52780 transitions. [2021-02-19 17:26:37,848 INFO L78 Accepts]: Start accepts. Automaton has 17924 states and 52780 transitions. Word has length 23 [2021-02-19 17:26:37,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:37,848 INFO L480 AbstractCegarLoop]: Abstraction has 17924 states and 52780 transitions. [2021-02-19 17:26:37,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:37,848 INFO L276 IsEmpty]: Start isEmpty. Operand 17924 states and 52780 transitions. [2021-02-19 17:26:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:37,862 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:37,863 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:38,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3370 [2021-02-19 17:26:38,063 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash 553525259, now seen corresponding path program 362 times [2021-02-19 17:26:38,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:38,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963713214] [2021-02-19 17:26:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:38,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963713214] [2021-02-19 17:26:38,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468207580] [2021-02-19 17:26:38,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:38,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:26:38,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:38,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:38,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:38,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:38,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-02-19 17:26:38,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965105761] [2021-02-19 17:26:38,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:26:38,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:38,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:26:38,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:26:38,232 INFO L87 Difference]: Start difference. First operand 17924 states and 52780 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:38,490 INFO L93 Difference]: Finished difference Result 18384 states and 53575 transitions. [2021-02-19 17:26:38,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:26:38,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:38,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:38,513 INFO L225 Difference]: With dead ends: 18384 [2021-02-19 17:26:38,513 INFO L226 Difference]: Without dead ends: 18374 [2021-02-19 17:26:38,513 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:26:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18374 states. [2021-02-19 17:26:38,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18374 to 17949. [2021-02-19 17:26:38,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17949 states, 17948 states have (on average 2.94394918653889) internal successors, (52838), 17948 states have internal predecessors, (52838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17949 states to 17949 states and 52838 transitions. [2021-02-19 17:26:38,750 INFO L78 Accepts]: Start accepts. Automaton has 17949 states and 52838 transitions. Word has length 23 [2021-02-19 17:26:38,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:38,750 INFO L480 AbstractCegarLoop]: Abstraction has 17949 states and 52838 transitions. [2021-02-19 17:26:38,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 17949 states and 52838 transitions. [2021-02-19 17:26:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:38,765 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:38,765 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:38,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3371 [2021-02-19 17:26:38,965 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:38,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:38,965 INFO L82 PathProgramCache]: Analyzing trace with hash -291446193, now seen corresponding path program 363 times [2021-02-19 17:26:38,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:38,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907464730] [2021-02-19 17:26:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:39,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907464730] [2021-02-19 17:26:39,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336840148] [2021-02-19 17:26:39,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:39,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:26:39,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:39,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:39,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:39,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:39,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-02-19 17:26:39,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719166798] [2021-02-19 17:26:39,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:26:39,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:39,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:26:39,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:26:39,146 INFO L87 Difference]: Start difference. First operand 17949 states and 52838 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:39,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:39,436 INFO L93 Difference]: Finished difference Result 20161 states and 58149 transitions. [2021-02-19 17:26:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:26:39,436 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:39,461 INFO L225 Difference]: With dead ends: 20161 [2021-02-19 17:26:39,462 INFO L226 Difference]: Without dead ends: 20149 [2021-02-19 17:26:39,462 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:26:39,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20149 states. [2021-02-19 17:26:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20149 to 17949. [2021-02-19 17:26:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17949 states, 17948 states have (on average 2.9437820369957657) internal successors, (52835), 17948 states have internal predecessors, (52835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:39,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17949 states to 17949 states and 52835 transitions. [2021-02-19 17:26:39,702 INFO L78 Accepts]: Start accepts. Automaton has 17949 states and 52835 transitions. Word has length 23 [2021-02-19 17:26:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:39,702 INFO L480 AbstractCegarLoop]: Abstraction has 17949 states and 52835 transitions. [2021-02-19 17:26:39,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 17949 states and 52835 transitions. [2021-02-19 17:26:39,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:39,715 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:39,715 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:39,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3372 [2021-02-19 17:26:39,916 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:39,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:39,916 INFO L82 PathProgramCache]: Analyzing trace with hash -715757429, now seen corresponding path program 364 times [2021-02-19 17:26:39,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:39,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702119796] [2021-02-19 17:26:39,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:40,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702119796] [2021-02-19 17:26:40,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314933165] [2021-02-19 17:26:40,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:40,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:26:40,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:40,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:40,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:40,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:40,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2021-02-19 17:26:40,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074852876] [2021-02-19 17:26:40,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:26:40,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:40,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:26:40,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:26:40,107 INFO L87 Difference]: Start difference. First operand 17949 states and 52835 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:40,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:40,414 INFO L93 Difference]: Finished difference Result 20182 states and 58169 transitions. [2021-02-19 17:26:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:26:40,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:40,440 INFO L225 Difference]: With dead ends: 20182 [2021-02-19 17:26:40,440 INFO L226 Difference]: Without dead ends: 20168 [2021-02-19 17:26:40,440 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=368, Invalid=822, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:26:40,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20168 states. [2021-02-19 17:26:40,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20168 to 17965. [2021-02-19 17:26:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17965 states, 17964 states have (on average 2.9436651079937652) internal successors, (52880), 17964 states have internal predecessors, (52880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17965 states to 17965 states and 52880 transitions. [2021-02-19 17:26:40,686 INFO L78 Accepts]: Start accepts. Automaton has 17965 states and 52880 transitions. Word has length 23 [2021-02-19 17:26:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:40,686 INFO L480 AbstractCegarLoop]: Abstraction has 17965 states and 52880 transitions. [2021-02-19 17:26:40,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:40,686 INFO L276 IsEmpty]: Start isEmpty. Operand 17965 states and 52880 transitions. [2021-02-19 17:26:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:40,700 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:40,700 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:40,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3373 [2021-02-19 17:26:40,901 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:40,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:40,901 INFO L82 PathProgramCache]: Analyzing trace with hash -984503857, now seen corresponding path program 365 times [2021-02-19 17:26:40,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:40,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642465315] [2021-02-19 17:26:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:41,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642465315] [2021-02-19 17:26:41,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091178067] [2021-02-19 17:26:41,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:41,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:26:41,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:41,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:41,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:41,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:41,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2021-02-19 17:26:41,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754570557] [2021-02-19 17:26:41,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:26:41,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:41,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:26:41,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:26:41,192 INFO L87 Difference]: Start difference. First operand 17965 states and 52880 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:41,584 INFO L93 Difference]: Finished difference Result 19520 states and 56422 transitions. [2021-02-19 17:26:41,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:26:41,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:41,607 INFO L225 Difference]: With dead ends: 19520 [2021-02-19 17:26:41,608 INFO L226 Difference]: Without dead ends: 19504 [2021-02-19 17:26:41,608 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 17:26:41,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19504 states. [2021-02-19 17:26:41,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19504 to 17965. [2021-02-19 17:26:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17965 states, 17964 states have (on average 2.943553774215097) internal successors, (52878), 17964 states have internal predecessors, (52878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17965 states to 17965 states and 52878 transitions. [2021-02-19 17:26:41,862 INFO L78 Accepts]: Start accepts. Automaton has 17965 states and 52878 transitions. Word has length 23 [2021-02-19 17:26:41,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:41,862 INFO L480 AbstractCegarLoop]: Abstraction has 17965 states and 52878 transitions. [2021-02-19 17:26:41,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:41,862 INFO L276 IsEmpty]: Start isEmpty. Operand 17965 states and 52878 transitions. [2021-02-19 17:26:41,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:41,876 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:41,876 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:42,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3374 [2021-02-19 17:26:42,076 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1578000237, now seen corresponding path program 366 times [2021-02-19 17:26:42,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:42,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574338437] [2021-02-19 17:26:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:42,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574338437] [2021-02-19 17:26:42,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159082633] [2021-02-19 17:26:42,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:42,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:26:42,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:42,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:42,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:42,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:42,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 20 [2021-02-19 17:26:42,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218111944] [2021-02-19 17:26:42,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:26:42,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:42,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:26:42,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:26:42,280 INFO L87 Difference]: Start difference. First operand 17965 states and 52878 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:42,493 INFO L93 Difference]: Finished difference Result 18366 states and 53616 transitions. [2021-02-19 17:26:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:26:42,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:42,516 INFO L225 Difference]: With dead ends: 18366 [2021-02-19 17:26:42,516 INFO L226 Difference]: Without dead ends: 18362 [2021-02-19 17:26:42,516 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=246, Invalid=566, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:26:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18362 states. [2021-02-19 17:26:42,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18362 to 18024. [2021-02-19 17:26:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18024 states, 18023 states have (on average 2.9440714642401375) internal successors, (53061), 18023 states have internal predecessors, (53061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18024 states to 18024 states and 53061 transitions. [2021-02-19 17:26:42,767 INFO L78 Accepts]: Start accepts. Automaton has 18024 states and 53061 transitions. Word has length 23 [2021-02-19 17:26:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:42,768 INFO L480 AbstractCegarLoop]: Abstraction has 18024 states and 53061 transitions. [2021-02-19 17:26:42,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 18024 states and 53061 transitions. [2021-02-19 17:26:42,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:42,782 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:42,782 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:42,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3375 [2021-02-19 17:26:42,983 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:42,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:42,983 INFO L82 PathProgramCache]: Analyzing trace with hash 166355253, now seen corresponding path program 367 times [2021-02-19 17:26:42,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:42,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479432476] [2021-02-19 17:26:42,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:43,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479432476] [2021-02-19 17:26:43,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405059052] [2021-02-19 17:26:43,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:43,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:43,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:26:43,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:43,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-02-19 17:26:43,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105764715] [2021-02-19 17:26:43,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:26:43,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:43,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:26:43,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:26:43,174 INFO L87 Difference]: Start difference. First operand 18024 states and 53061 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:43,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:43,452 INFO L93 Difference]: Finished difference Result 19774 states and 57237 transitions. [2021-02-19 17:26:43,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:26:43,453 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:43,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:43,477 INFO L225 Difference]: With dead ends: 19774 [2021-02-19 17:26:43,477 INFO L226 Difference]: Without dead ends: 19762 [2021-02-19 17:26:43,477 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:26:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19762 states. [2021-02-19 17:26:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19762 to 18024. [2021-02-19 17:26:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18024 states, 18023 states have (on average 2.9434056483382345) internal successors, (53049), 18023 states have internal predecessors, (53049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18024 states to 18024 states and 53049 transitions. [2021-02-19 17:26:43,722 INFO L78 Accepts]: Start accepts. Automaton has 18024 states and 53049 transitions. Word has length 23 [2021-02-19 17:26:43,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:43,722 INFO L480 AbstractCegarLoop]: Abstraction has 18024 states and 53049 transitions. [2021-02-19 17:26:43,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:43,722 INFO L276 IsEmpty]: Start isEmpty. Operand 18024 states and 53049 transitions. [2021-02-19 17:26:43,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:43,735 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:43,735 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:43,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3376,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:43,936 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:43,936 INFO L82 PathProgramCache]: Analyzing trace with hash -257955983, now seen corresponding path program 368 times [2021-02-19 17:26:43,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:43,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057582507] [2021-02-19 17:26:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:44,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057582507] [2021-02-19 17:26:44,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018338364] [2021-02-19 17:26:44,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:44,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:26:44,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:44,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:44,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:44,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:44,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 19 [2021-02-19 17:26:44,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482544331] [2021-02-19 17:26:44,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:26:44,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:44,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:26:44,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:26:44,142 INFO L87 Difference]: Start difference. First operand 18024 states and 53049 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:44,415 INFO L93 Difference]: Finished difference Result 19789 states and 57244 transitions. [2021-02-19 17:26:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:26:44,416 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:44,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:44,438 INFO L225 Difference]: With dead ends: 19789 [2021-02-19 17:26:44,438 INFO L226 Difference]: Without dead ends: 19775 [2021-02-19 17:26:44,438 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:26:44,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19775 states. [2021-02-19 17:26:44,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19775 to 18045. [2021-02-19 17:26:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18045 states, 18044 states have (on average 2.9428618931500776) internal successors, (53101), 18044 states have internal predecessors, (53101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18045 states to 18045 states and 53101 transitions. [2021-02-19 17:26:44,689 INFO L78 Accepts]: Start accepts. Automaton has 18045 states and 53101 transitions. Word has length 23 [2021-02-19 17:26:44,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:44,690 INFO L480 AbstractCegarLoop]: Abstraction has 18045 states and 53101 transitions. [2021-02-19 17:26:44,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:44,690 INFO L276 IsEmpty]: Start isEmpty. Operand 18045 states and 53101 transitions. [2021-02-19 17:26:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:44,704 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:44,704 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:44,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:44,905 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:44,905 INFO L82 PathProgramCache]: Analyzing trace with hash -526702411, now seen corresponding path program 369 times [2021-02-19 17:26:44,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:44,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922949225] [2021-02-19 17:26:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:45,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922949225] [2021-02-19 17:26:45,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106071655] [2021-02-19 17:26:45,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:45,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:26:45,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:45,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:45,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:45,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:45,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-02-19 17:26:45,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471623980] [2021-02-19 17:26:45,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:26:45,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:45,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:26:45,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:26:45,202 INFO L87 Difference]: Start difference. First operand 18045 states and 53101 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:45,572 INFO L93 Difference]: Finished difference Result 19644 states and 56782 transitions. [2021-02-19 17:26:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:26:45,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:45,596 INFO L225 Difference]: With dead ends: 19644 [2021-02-19 17:26:45,597 INFO L226 Difference]: Without dead ends: 19628 [2021-02-19 17:26:45,597 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=418, Invalid=988, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:26:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19628 states. [2021-02-19 17:26:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19628 to 18045. [2021-02-19 17:26:45,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18045 states, 18044 states have (on average 2.9427510529816003) internal successors, (53099), 18044 states have internal predecessors, (53099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:45,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18045 states to 18045 states and 53099 transitions. [2021-02-19 17:26:45,828 INFO L78 Accepts]: Start accepts. Automaton has 18045 states and 53099 transitions. Word has length 23 [2021-02-19 17:26:45,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:45,828 INFO L480 AbstractCegarLoop]: Abstraction has 18045 states and 53099 transitions. [2021-02-19 17:26:45,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:45,828 INFO L276 IsEmpty]: Start isEmpty. Operand 18045 states and 53099 transitions. [2021-02-19 17:26:45,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:45,842 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:45,842 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:46,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3378 [2021-02-19 17:26:46,042 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:46,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:46,042 INFO L82 PathProgramCache]: Analyzing trace with hash 502899599, now seen corresponding path program 370 times [2021-02-19 17:26:46,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:46,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473682468] [2021-02-19 17:26:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:46,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473682468] [2021-02-19 17:26:46,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400848073] [2021-02-19 17:26:46,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:46,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:26:46,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:46,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:46,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:46,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:46,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 17 [2021-02-19 17:26:46,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313071613] [2021-02-19 17:26:46,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:26:46,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:46,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:26:46,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:26:46,226 INFO L87 Difference]: Start difference. First operand 18045 states and 53099 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:46,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:46,399 INFO L93 Difference]: Finished difference Result 18756 states and 54740 transitions. [2021-02-19 17:26:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:26:46,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:46,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:46,420 INFO L225 Difference]: With dead ends: 18756 [2021-02-19 17:26:46,420 INFO L226 Difference]: Without dead ends: 18756 [2021-02-19 17:26:46,421 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:26:46,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18756 states. [2021-02-19 17:26:46,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18756 to 18339. [2021-02-19 17:26:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18339 states, 18338 states have (on average 2.9493946995310285) internal successors, (54086), 18338 states have internal predecessors, (54086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:46,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18339 states to 18339 states and 54086 transitions. [2021-02-19 17:26:46,665 INFO L78 Accepts]: Start accepts. Automaton has 18339 states and 54086 transitions. Word has length 23 [2021-02-19 17:26:46,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:46,665 INFO L480 AbstractCegarLoop]: Abstraction has 18339 states and 54086 transitions. [2021-02-19 17:26:46,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 18339 states and 54086 transitions. [2021-02-19 17:26:46,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:46,682 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:46,682 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:46,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3379,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:46,882 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:46,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:46,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1012086031, now seen corresponding path program 371 times [2021-02-19 17:26:46,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:46,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510170338] [2021-02-19 17:26:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:47,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510170338] [2021-02-19 17:26:47,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124149651] [2021-02-19 17:26:47,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:47,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:26:47,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:47,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:47,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:47,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 20 [2021-02-19 17:26:47,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700141741] [2021-02-19 17:26:47,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:26:47,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:47,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:26:47,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:26:47,114 INFO L87 Difference]: Start difference. First operand 18339 states and 54086 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:47,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:47,413 INFO L93 Difference]: Finished difference Result 20078 states and 58316 transitions. [2021-02-19 17:26:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:26:47,414 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:47,439 INFO L225 Difference]: With dead ends: 20078 [2021-02-19 17:26:47,439 INFO L226 Difference]: Without dead ends: 20062 [2021-02-19 17:26:47,439 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:26:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20062 states. [2021-02-19 17:26:47,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20062 to 18339. [2021-02-19 17:26:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18339 states, 18338 states have (on average 2.949285636383466) internal successors, (54084), 18338 states have internal predecessors, (54084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18339 states to 18339 states and 54084 transitions. [2021-02-19 17:26:47,685 INFO L78 Accepts]: Start accepts. Automaton has 18339 states and 54084 transitions. Word has length 23 [2021-02-19 17:26:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:47,685 INFO L480 AbstractCegarLoop]: Abstraction has 18339 states and 54084 transitions. [2021-02-19 17:26:47,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 18339 states and 54084 transitions. [2021-02-19 17:26:47,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:47,701 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:47,701 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:47,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3380 [2021-02-19 17:26:47,901 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:47,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:47,902 INFO L82 PathProgramCache]: Analyzing trace with hash -676900589, now seen corresponding path program 372 times [2021-02-19 17:26:47,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:47,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677183747] [2021-02-19 17:26:47,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:48,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677183747] [2021-02-19 17:26:48,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350842263] [2021-02-19 17:26:48,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:48,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:26:48,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:48,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:48,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:48,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:48,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 18 [2021-02-19 17:26:48,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434866936] [2021-02-19 17:26:48,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:26:48,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:48,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:26:48,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:26:48,095 INFO L87 Difference]: Start difference. First operand 18339 states and 54084 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:48,253 INFO L93 Difference]: Finished difference Result 21264 states and 62351 transitions. [2021-02-19 17:26:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:26:48,254 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:48,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:48,280 INFO L225 Difference]: With dead ends: 21264 [2021-02-19 17:26:48,280 INFO L226 Difference]: Without dead ends: 21264 [2021-02-19 17:26:48,280 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:26:48,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21264 states. [2021-02-19 17:26:48,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21264 to 20808. [2021-02-19 17:26:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20808 states, 20807 states have (on average 2.963329648675926) internal successors, (61658), 20807 states have internal predecessors, (61658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20808 states to 20808 states and 61658 transitions. [2021-02-19 17:26:48,560 INFO L78 Accepts]: Start accepts. Automaton has 20808 states and 61658 transitions. Word has length 23 [2021-02-19 17:26:48,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:48,560 INFO L480 AbstractCegarLoop]: Abstraction has 20808 states and 61658 transitions. [2021-02-19 17:26:48,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:48,560 INFO L276 IsEmpty]: Start isEmpty. Operand 20808 states and 61658 transitions. [2021-02-19 17:26:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:48,576 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:48,576 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:48,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-02-19 17:26:48,776 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:48,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:48,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1515799887, now seen corresponding path program 373 times [2021-02-19 17:26:48,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:48,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112930092] [2021-02-19 17:26:48,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:48,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112930092] [2021-02-19 17:26:48,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235047293] [2021-02-19 17:26:48,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:48,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:48,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 49 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:26:48,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:48,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 17 [2021-02-19 17:26:48,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268130398] [2021-02-19 17:26:48,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:26:48,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:48,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:26:48,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:26:48,957 INFO L87 Difference]: Start difference. First operand 20808 states and 61658 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:49,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:49,261 INFO L93 Difference]: Finished difference Result 21196 states and 62195 transitions. [2021-02-19 17:26:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:26:49,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:49,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:49,287 INFO L225 Difference]: With dead ends: 21196 [2021-02-19 17:26:49,288 INFO L226 Difference]: Without dead ends: 21194 [2021-02-19 17:26:49,288 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:26:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21194 states. [2021-02-19 17:26:49,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21194 to 20808. [2021-02-19 17:26:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20808 states, 20807 states have (on average 2.9632335271783536) internal successors, (61656), 20807 states have internal predecessors, (61656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20808 states to 20808 states and 61656 transitions. [2021-02-19 17:26:49,572 INFO L78 Accepts]: Start accepts. Automaton has 20808 states and 61656 transitions. Word has length 23 [2021-02-19 17:26:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:49,572 INFO L480 AbstractCegarLoop]: Abstraction has 20808 states and 61656 transitions. [2021-02-19 17:26:49,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 20808 states and 61656 transitions. [2021-02-19 17:26:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:49,587 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:49,587 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:49,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3382,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:49,787 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:49,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:49,787 INFO L82 PathProgramCache]: Analyzing trace with hash -26394891, now seen corresponding path program 374 times [2021-02-19 17:26:49,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:49,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052616024] [2021-02-19 17:26:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:49,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052616024] [2021-02-19 17:26:49,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850720701] [2021-02-19 17:26:49,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:49,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:26:49,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:49,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:49,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:49,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:49,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18 [2021-02-19 17:26:49,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114798172] [2021-02-19 17:26:49,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:26:49,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:49,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:26:49,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:26:49,979 INFO L87 Difference]: Start difference. First operand 20808 states and 61656 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:50,243 INFO L93 Difference]: Finished difference Result 21202 states and 62201 transitions. [2021-02-19 17:26:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:26:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:50,271 INFO L225 Difference]: With dead ends: 21202 [2021-02-19 17:26:50,272 INFO L226 Difference]: Without dead ends: 21198 [2021-02-19 17:26:50,272 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:26:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21198 states. [2021-02-19 17:26:50,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21198 to 20817. [2021-02-19 17:26:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20817 states, 20816 states have (on average 2.963441583397387) internal successors, (61687), 20816 states have internal predecessors, (61687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20817 states to 20817 states and 61687 transitions. [2021-02-19 17:26:50,579 INFO L78 Accepts]: Start accepts. Automaton has 20817 states and 61687 transitions. Word has length 23 [2021-02-19 17:26:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:50,579 INFO L480 AbstractCegarLoop]: Abstraction has 20817 states and 61687 transitions. [2021-02-19 17:26:50,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:50,579 INFO L276 IsEmpty]: Start isEmpty. Operand 20817 states and 61687 transitions. [2021-02-19 17:26:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:50,596 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:50,596 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:50,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3383 [2021-02-19 17:26:50,797 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:50,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1099480271, now seen corresponding path program 375 times [2021-02-19 17:26:50,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:50,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089109730] [2021-02-19 17:26:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:50,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089109730] [2021-02-19 17:26:50,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974820237] [2021-02-19 17:26:50,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:50,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:26:50,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:50,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:50,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:50,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:50,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 18 [2021-02-19 17:26:50,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553408417] [2021-02-19 17:26:50,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:26:50,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:50,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:26:50,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:26:50,994 INFO L87 Difference]: Start difference. First operand 20817 states and 61687 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:51,288 INFO L93 Difference]: Finished difference Result 25190 states and 73709 transitions. [2021-02-19 17:26:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:26:51,288 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:51,326 INFO L225 Difference]: With dead ends: 25190 [2021-02-19 17:26:51,326 INFO L226 Difference]: Without dead ends: 25184 [2021-02-19 17:26:51,326 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:26:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25184 states. [2021-02-19 17:26:51,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25184 to 20817. [2021-02-19 17:26:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20817 states, 20816 states have (on average 2.96315334358186) internal successors, (61681), 20816 states have internal predecessors, (61681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20817 states to 20817 states and 61681 transitions. [2021-02-19 17:26:51,635 INFO L78 Accepts]: Start accepts. Automaton has 20817 states and 61681 transitions. Word has length 23 [2021-02-19 17:26:51,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:51,635 INFO L480 AbstractCegarLoop]: Abstraction has 20817 states and 61681 transitions. [2021-02-19 17:26:51,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 20817 states and 61681 transitions. [2021-02-19 17:26:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:51,651 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:51,651 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:51,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3384 [2021-02-19 17:26:51,851 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:51,852 INFO L82 PathProgramCache]: Analyzing trace with hash -5388683, now seen corresponding path program 376 times [2021-02-19 17:26:51,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:51,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798532208] [2021-02-19 17:26:51,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:51,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798532208] [2021-02-19 17:26:51,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511694589] [2021-02-19 17:26:51,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:51,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:26:51,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:52,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:52,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 19 [2021-02-19 17:26:52,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640080244] [2021-02-19 17:26:52,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:26:52,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:52,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:26:52,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:26:52,057 INFO L87 Difference]: Start difference. First operand 20817 states and 61681 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:52,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:52,347 INFO L93 Difference]: Finished difference Result 25207 states and 73725 transitions. [2021-02-19 17:26:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:26:52,348 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:52,382 INFO L225 Difference]: With dead ends: 25207 [2021-02-19 17:26:52,382 INFO L226 Difference]: Without dead ends: 25199 [2021-02-19 17:26:52,382 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:26:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25199 states. [2021-02-19 17:26:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25199 to 20846. [2021-02-19 17:26:52,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20846 states, 20845 states have (on average 2.962772847205565) internal successors, (61759), 20845 states have internal predecessors, (61759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20846 states to 20846 states and 61759 transitions. [2021-02-19 17:26:52,799 INFO L78 Accepts]: Start accepts. Automaton has 20846 states and 61759 transitions. Word has length 23 [2021-02-19 17:26:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:52,799 INFO L480 AbstractCegarLoop]: Abstraction has 20846 states and 61759 transitions. [2021-02-19 17:26:52,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 20846 states and 61759 transitions. [2021-02-19 17:26:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:52,813 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:52,813 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:53,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3385 [2021-02-19 17:26:53,014 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:53,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:53,014 INFO L82 PathProgramCache]: Analyzing trace with hash -448287823, now seen corresponding path program 377 times [2021-02-19 17:26:53,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:53,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022265120] [2021-02-19 17:26:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:53,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022265120] [2021-02-19 17:26:53,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926672731] [2021-02-19 17:26:53,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:53,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:26:53,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:53,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:53,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:53,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:53,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 19 [2021-02-19 17:26:53,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500853758] [2021-02-19 17:26:53,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:26:53,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:53,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:26:53,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:26:53,226 INFO L87 Difference]: Start difference. First operand 20846 states and 61759 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:53,533 INFO L93 Difference]: Finished difference Result 24899 states and 72765 transitions. [2021-02-19 17:26:53,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:26:53,534 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:53,565 INFO L225 Difference]: With dead ends: 24899 [2021-02-19 17:26:53,565 INFO L226 Difference]: Without dead ends: 24889 [2021-02-19 17:26:53,565 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:26:53,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24889 states. [2021-02-19 17:26:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24889 to 20846. [2021-02-19 17:26:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20846 states, 20845 states have (on average 2.9624850083952987) internal successors, (61753), 20845 states have internal predecessors, (61753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:53,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20846 states to 20846 states and 61753 transitions. [2021-02-19 17:26:53,873 INFO L78 Accepts]: Start accepts. Automaton has 20846 states and 61753 transitions. Word has length 23 [2021-02-19 17:26:53,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:53,873 INFO L480 AbstractCegarLoop]: Abstraction has 20846 states and 61753 transitions. [2021-02-19 17:26:53,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:53,874 INFO L276 IsEmpty]: Start isEmpty. Operand 20846 states and 61753 transitions. [2021-02-19 17:26:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:53,890 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:53,890 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:54,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3386 [2021-02-19 17:26:54,090 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:54,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:54,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1293259275, now seen corresponding path program 378 times [2021-02-19 17:26:54,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:54,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099131383] [2021-02-19 17:26:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:54,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099131383] [2021-02-19 17:26:54,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861308967] [2021-02-19 17:26:54,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:54,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:26:54,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:54,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:54,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:54,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:54,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 20 [2021-02-19 17:26:54,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518639639] [2021-02-19 17:26:54,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:26:54,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:54,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:26:54,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:26:54,314 INFO L87 Difference]: Start difference. First operand 20846 states and 61753 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:54,633 INFO L93 Difference]: Finished difference Result 24928 states and 72793 transitions. [2021-02-19 17:26:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:26:54,634 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:54,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:54,667 INFO L225 Difference]: With dead ends: 24928 [2021-02-19 17:26:54,668 INFO L226 Difference]: Without dead ends: 24916 [2021-02-19 17:26:54,668 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=293, Invalid=763, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:26:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24916 states. [2021-02-19 17:26:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24916 to 20943. [2021-02-19 17:26:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20943 states, 20942 states have (on average 2.962276764396906) internal successors, (62036), 20942 states have internal predecessors, (62036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20943 states to 20943 states and 62036 transitions. [2021-02-19 17:26:54,982 INFO L78 Accepts]: Start accepts. Automaton has 20943 states and 62036 transitions. Word has length 23 [2021-02-19 17:26:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:54,982 INFO L480 AbstractCegarLoop]: Abstraction has 20943 states and 62036 transitions. [2021-02-19 17:26:54,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 20943 states and 62036 transitions. [2021-02-19 17:26:54,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:54,997 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:54,997 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:55,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:55,202 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:55,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:55,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1717570511, now seen corresponding path program 379 times [2021-02-19 17:26:55,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:55,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204623337] [2021-02-19 17:26:55,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:55,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204623337] [2021-02-19 17:26:55,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377534163] [2021-02-19 17:26:55,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:55,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:55,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:26:55,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:55,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 20 [2021-02-19 17:26:55,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798165453] [2021-02-19 17:26:55,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:26:55,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:55,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:26:55,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:26:55,431 INFO L87 Difference]: Start difference. First operand 20943 states and 62036 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:55,728 INFO L93 Difference]: Finished difference Result 23326 states and 68287 transitions. [2021-02-19 17:26:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:26:55,729 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:55,758 INFO L225 Difference]: With dead ends: 23326 [2021-02-19 17:26:55,758 INFO L226 Difference]: Without dead ends: 23312 [2021-02-19 17:26:55,758 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:26:55,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23312 states. [2021-02-19 17:26:56,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23312 to 20943. [2021-02-19 17:26:56,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20943 states, 20942 states have (on average 2.9621812625346196) internal successors, (62034), 20942 states have internal predecessors, (62034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20943 states to 20943 states and 62034 transitions. [2021-02-19 17:26:56,061 INFO L78 Accepts]: Start accepts. Automaton has 20943 states and 62034 transitions. Word has length 23 [2021-02-19 17:26:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:56,061 INFO L480 AbstractCegarLoop]: Abstraction has 20943 states and 62034 transitions. [2021-02-19 17:26:56,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 20943 states and 62034 transitions. [2021-02-19 17:26:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:56,079 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:56,079 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:56,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3388,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:56,279 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:56,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:56,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1986316939, now seen corresponding path program 380 times [2021-02-19 17:26:56,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:56,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480709635] [2021-02-19 17:26:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:56,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480709635] [2021-02-19 17:26:56,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717577405] [2021-02-19 17:26:56,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:56,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:26:56,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:56,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:26:56,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:26:56,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:56,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 21 [2021-02-19 17:26:56,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771140053] [2021-02-19 17:26:56,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 17:26:56,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:56,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 17:26:56,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:26:56,559 INFO L87 Difference]: Start difference. First operand 20943 states and 62034 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:56,936 INFO L93 Difference]: Finished difference Result 23360 states and 68323 transitions. [2021-02-19 17:26:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:26:56,937 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:56,963 INFO L225 Difference]: With dead ends: 23360 [2021-02-19 17:26:56,963 INFO L226 Difference]: Without dead ends: 23344 [2021-02-19 17:26:56,964 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:26:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23344 states. [2021-02-19 17:26:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23344 to 20954. [2021-02-19 17:26:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20954 states, 20953 states have (on average 2.962105665059896) internal successors, (62065), 20953 states have internal predecessors, (62065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:57,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20954 states to 20954 states and 62065 transitions. [2021-02-19 17:26:57,256 INFO L78 Accepts]: Start accepts. Automaton has 20954 states and 62065 transitions. Word has length 23 [2021-02-19 17:26:57,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:57,256 INFO L480 AbstractCegarLoop]: Abstraction has 20954 states and 62065 transitions. [2021-02-19 17:26:57,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:57,256 INFO L276 IsEmpty]: Start isEmpty. Operand 20954 states and 62065 transitions. [2021-02-19 17:26:57,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:26:57,272 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:57,273 INFO L506 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:57,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3389,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:57,473 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:57,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:57,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1727521615, now seen corresponding path program 381 times [2021-02-19 17:26:57,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:57,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763150620] [2021-02-19 17:26:57,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:57,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763150620] [2021-02-19 17:26:57,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393130369] [2021-02-19 17:26:57,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:57,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 17:26:57,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:57,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 17:26:57,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 55 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:57,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:26:57,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-02-19 17:26:57,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640994232] [2021-02-19 17:26:57,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 17:26:57,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:26:57,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 17:26:57,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:26:57,741 INFO L87 Difference]: Start difference. First operand 20954 states and 62065 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:58,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:26:58,075 INFO L93 Difference]: Finished difference Result 21305 states and 62900 transitions. [2021-02-19 17:26:58,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:26:58,075 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:26:58,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:26:58,100 INFO L225 Difference]: With dead ends: 21305 [2021-02-19 17:26:58,100 INFO L226 Difference]: Without dead ends: 21296 [2021-02-19 17:26:58,101 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 17:26:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21296 states. [2021-02-19 17:26:58,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21296 to 20954. [2021-02-19 17:26:58,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20954 states, 20953 states have (on average 2.962057939197251) internal successors, (62064), 20953 states have internal predecessors, (62064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20954 states to 20954 states and 62064 transitions. [2021-02-19 17:26:58,373 INFO L78 Accepts]: Start accepts. Automaton has 20954 states and 62064 transitions. Word has length 23 [2021-02-19 17:26:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:26:58,373 INFO L480 AbstractCegarLoop]: Abstraction has 20954 states and 62064 transitions. [2021-02-19 17:26:58,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:26:58,373 INFO L276 IsEmpty]: Start isEmpty. Operand 20954 states and 62064 transitions. [2021-02-19 17:26:58,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:26:58,389 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:26:58,389 INFO L506 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:26:58,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3390 [2021-02-19 17:26:58,590 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:26:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:26:58,590 INFO L82 PathProgramCache]: Analyzing trace with hash 849462450, now seen corresponding path program 382 times [2021-02-19 17:26:58,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:26:58,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766990614] [2021-02-19 17:26:58,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:26:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:26:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:26:58,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766990614] [2021-02-19 17:26:58,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438840791] [2021-02-19 17:26:58,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:26:58,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:26:58,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:26:58,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 17:26:58,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:26:59,219 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-02-19 17:26:59,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:26:59,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-02-19 17:27:01,207 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-02-19 17:27:02,655 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 886 DAG size of output: 911 [2021-02-19 17:27:03,893 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 122 [2021-02-19 17:27:05,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:27:05,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:27:05,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:27:05,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-02-19 17:27:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:27:05,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:27:05,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-02-19 17:27:05,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127849451] [2021-02-19 17:27:05,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:27:05,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:27:05,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:27:05,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:27:05,198 INFO L87 Difference]: Start difference. First operand 20954 states and 62064 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:27:05,506 INFO L93 Difference]: Finished difference Result 21168 states and 62490 transitions. [2021-02-19 17:27:05,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:27:05,506 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 17:27:05,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:27:05,530 INFO L225 Difference]: With dead ends: 21168 [2021-02-19 17:27:05,530 INFO L226 Difference]: Without dead ends: 21165 [2021-02-19 17:27:05,531 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:27:05,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21165 states. [2021-02-19 17:27:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21165 to 21035. [2021-02-19 17:27:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21035 states, 21034 states have (on average 2.962061424360559) internal successors, (62304), 21034 states have internal predecessors, (62304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21035 states to 21035 states and 62304 transitions. [2021-02-19 17:27:05,810 INFO L78 Accepts]: Start accepts. Automaton has 21035 states and 62304 transitions. Word has length 24 [2021-02-19 17:27:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:27:05,810 INFO L480 AbstractCegarLoop]: Abstraction has 21035 states and 62304 transitions. [2021-02-19 17:27:05,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:05,810 INFO L276 IsEmpty]: Start isEmpty. Operand 21035 states and 62304 transitions. [2021-02-19 17:27:05,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:27:05,826 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:27:05,826 INFO L506 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:27:06,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3391,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:27:06,027 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:27:06,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:27:06,027 INFO L82 PathProgramCache]: Analyzing trace with hash -773124366, now seen corresponding path program 383 times [2021-02-19 17:27:06,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:27:06,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459342394] [2021-02-19 17:27:06,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:27:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:27:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:27:06,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459342394] [2021-02-19 17:27:06,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116915465] [2021-02-19 17:27:06,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:27:06,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:27:06,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:27:06,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 17:27:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:27:06,644 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-02-19 17:27:06,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:27:06,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-02-19 17:27:07,771 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 354 [2021-02-19 17:27:10,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:27:10,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:27:10,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:27:10,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-02-19 17:27:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:27:10,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:27:10,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-02-19 17:27:10,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301020257] [2021-02-19 17:27:10,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:27:10,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:27:10,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:27:10,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:27:10,334 INFO L87 Difference]: Start difference. First operand 21035 states and 62304 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:10,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:27:10,801 INFO L93 Difference]: Finished difference Result 21261 states and 62733 transitions. [2021-02-19 17:27:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:27:10,802 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 17:27:10,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:27:10,826 INFO L225 Difference]: With dead ends: 21261 [2021-02-19 17:27:10,827 INFO L226 Difference]: Without dead ends: 21258 [2021-02-19 17:27:10,827 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:27:10,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21258 states. [2021-02-19 17:27:11,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21258 to 21085. [2021-02-19 17:27:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21085 states, 21084 states have (on average 2.9631474103585655) internal successors, (62475), 21084 states have internal predecessors, (62475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21085 states to 21085 states and 62475 transitions. [2021-02-19 17:27:11,176 INFO L78 Accepts]: Start accepts. Automaton has 21085 states and 62475 transitions. Word has length 24 [2021-02-19 17:27:11,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:27:11,176 INFO L480 AbstractCegarLoop]: Abstraction has 21085 states and 62475 transitions. [2021-02-19 17:27:11,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:11,177 INFO L276 IsEmpty]: Start isEmpty. Operand 21085 states and 62475 transitions. [2021-02-19 17:27:11,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:27:11,194 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:27:11,194 INFO L506 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:27:11,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4892,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:27:11,396 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:27:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:27:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash 223080874, now seen corresponding path program 384 times [2021-02-19 17:27:11,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:27:11,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300418256] [2021-02-19 17:27:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:27:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:27:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:27:11,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300418256] [2021-02-19 17:27:11,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839145373] [2021-02-19 17:27:11,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:27:11,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:27:11,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:27:11,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 17:27:11,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:27:12,015 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-02-19 17:27:12,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:27:12,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-02-19 17:27:13,414 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 438 [2021-02-19 17:27:14,961 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 220 [2021-02-19 17:27:17,581 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1417 DAG size of output: 844 [2021-02-19 17:27:17,727 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1733 DAG size of output: 1075 [2021-02-19 17:27:17,872 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1733 DAG size of output: 1075 [2021-02-19 17:27:18,019 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1739 DAG size of output: 1081 [2021-02-19 17:27:18,626 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 170 [2021-02-19 17:27:19,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:27:19,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:27:19,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:27:19,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-02-19 17:27:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:27:19,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:27:19,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-02-19 17:27:19,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375216224] [2021-02-19 17:27:19,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:27:19,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:27:19,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:27:19,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:27:19,292 INFO L87 Difference]: Start difference. First operand 21085 states and 62475 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:19,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:27:19,837 INFO L93 Difference]: Finished difference Result 21337 states and 62976 transitions. [2021-02-19 17:27:19,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:27:19,838 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 17:27:19,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:27:19,864 INFO L225 Difference]: With dead ends: 21337 [2021-02-19 17:27:19,864 INFO L226 Difference]: Without dead ends: 21334 [2021-02-19 17:27:19,864 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:27:19,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21334 states. [2021-02-19 17:27:20,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21334 to 21152. [2021-02-19 17:27:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21152 states, 21151 states have (on average 2.964540683655619) internal successors, (62703), 21151 states have internal predecessors, (62703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21152 states to 21152 states and 62703 transitions. [2021-02-19 17:27:20,156 INFO L78 Accepts]: Start accepts. Automaton has 21152 states and 62703 transitions. Word has length 24 [2021-02-19 17:27:20,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:27:20,156 INFO L480 AbstractCegarLoop]: Abstraction has 21152 states and 62703 transitions. [2021-02-19 17:27:20,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:20,156 INFO L276 IsEmpty]: Start isEmpty. Operand 21152 states and 62703 transitions. [2021-02-19 17:27:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:27:20,172 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:27:20,172 INFO L506 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:27:20,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5737,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:27:20,372 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:27:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:27:20,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1040672242, now seen corresponding path program 385 times [2021-02-19 17:27:20,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:27:20,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721033317] [2021-02-19 17:27:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:27:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:27:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:27:20,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721033317] [2021-02-19 17:27:20,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762359815] [2021-02-19 17:27:20,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:27:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:27:20,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 17:27:20,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:27:21,005 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-02-19 17:27:21,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:27:21,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-02-19 17:27:21,982 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 313 [2021-02-19 17:27:23,668 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 412 [2021-02-19 17:27:25,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:27:25,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:27:25,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:27:25,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-02-19 17:27:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:27:25,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:27:25,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-02-19 17:27:25,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116141597] [2021-02-19 17:27:25,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:27:25,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:27:25,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:27:25,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:27:25,611 INFO L87 Difference]: Start difference. First operand 21152 states and 62703 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:26,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:27:26,118 INFO L93 Difference]: Finished difference Result 21422 states and 63245 transitions. [2021-02-19 17:27:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:27:26,119 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 17:27:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:27:26,148 INFO L225 Difference]: With dead ends: 21422 [2021-02-19 17:27:26,148 INFO L226 Difference]: Without dead ends: 21419 [2021-02-19 17:27:26,148 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:27:26,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21419 states. [2021-02-19 17:27:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21419 to 21221. [2021-02-19 17:27:26,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21221 states, 21220 states have (on average 2.9663524976437325) internal successors, (62946), 21220 states have internal predecessors, (62946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:26,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21221 states to 21221 states and 62946 transitions. [2021-02-19 17:27:26,484 INFO L78 Accepts]: Start accepts. Automaton has 21221 states and 62946 transitions. Word has length 24 [2021-02-19 17:27:26,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:27:26,484 INFO L480 AbstractCegarLoop]: Abstraction has 21221 states and 62946 transitions. [2021-02-19 17:27:26,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 21221 states and 62946 transitions. [2021-02-19 17:27:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:27:26,500 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:27:26,500 INFO L506 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:27:26,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8150,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:27:26,701 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:27:26,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:27:26,701 INFO L82 PathProgramCache]: Analyzing trace with hash 616200874, now seen corresponding path program 386 times [2021-02-19 17:27:26,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:27:26,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607298009] [2021-02-19 17:27:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:27:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:27:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:27:26,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607298009] [2021-02-19 17:27:26,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909250768] [2021-02-19 17:27:26,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:27:26,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:27:26,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:27:26,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 17:27:26,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:27:27,322 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-02-19 17:27:27,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:27:27,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-02-19 17:27:31,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:27:31,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:27:31,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:27:31,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-02-19 17:27:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:27:31,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:27:31,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-02-19 17:27:31,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939150343] [2021-02-19 17:27:31,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:27:31,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:27:31,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:27:31,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:27:31,789 INFO L87 Difference]: Start difference. First operand 21221 states and 62946 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:32,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:27:32,284 INFO L93 Difference]: Finished difference Result 21534 states and 63613 transitions. [2021-02-19 17:27:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:27:32,285 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 17:27:32,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:27:32,311 INFO L225 Difference]: With dead ends: 21534 [2021-02-19 17:27:32,312 INFO L226 Difference]: Without dead ends: 21531 [2021-02-19 17:27:32,312 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:27:32,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21531 states. [2021-02-19 17:27:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21531 to 21323. [2021-02-19 17:27:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21323 states, 21322 states have (on average 2.96909295563268) internal successors, (63307), 21322 states have internal predecessors, (63307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:32,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21323 states to 21323 states and 63307 transitions. [2021-02-19 17:27:32,612 INFO L78 Accepts]: Start accepts. Automaton has 21323 states and 63307 transitions. Word has length 24 [2021-02-19 17:27:32,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:27:32,612 INFO L480 AbstractCegarLoop]: Abstraction has 21323 states and 63307 transitions. [2021-02-19 17:27:32,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 21323 states and 63307 transitions. [2021-02-19 17:27:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:27:32,629 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:27:32,629 INFO L506 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:27:32,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9448,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:27:32,830 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:27:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:27:32,830 INFO L82 PathProgramCache]: Analyzing trace with hash 342490354, now seen corresponding path program 387 times [2021-02-19 17:27:32,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:27:32,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843529673] [2021-02-19 17:27:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:27:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:27:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:27:32,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843529673] [2021-02-19 17:27:32,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718047704] [2021-02-19 17:27:32,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:27:32,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:27:32,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:27:32,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 17:27:32,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:27:33,447 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-02-19 17:27:33,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:27:33,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-02-19 17:27:34,087 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 323 [2021-02-19 17:27:36,205 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 380 [2021-02-19 17:27:38,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:27:38,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:27:38,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:27:38,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-02-19 17:27:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:27:38,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:27:38,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-02-19 17:27:38,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151261831] [2021-02-19 17:27:38,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:27:38,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:27:38,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:27:38,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:27:38,132 INFO L87 Difference]: Start difference. First operand 21323 states and 63307 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:38,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:27:38,532 INFO L93 Difference]: Finished difference Result 21668 states and 64061 transitions. [2021-02-19 17:27:38,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:27:38,533 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 17:27:38,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:27:38,559 INFO L225 Difference]: With dead ends: 21668 [2021-02-19 17:27:38,559 INFO L226 Difference]: Without dead ends: 21665 [2021-02-19 17:27:38,560 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:27:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21665 states. [2021-02-19 17:27:38,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21665 to 21440. [2021-02-19 17:27:38,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21440 states, 21439 states have (on average 2.972573347637483) internal successors, (63729), 21439 states have internal predecessors, (63729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21440 states to 21440 states and 63729 transitions. [2021-02-19 17:27:38,857 INFO L78 Accepts]: Start accepts. Automaton has 21440 states and 63729 transitions. Word has length 24 [2021-02-19 17:27:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:27:38,858 INFO L480 AbstractCegarLoop]: Abstraction has 21440 states and 63729 transitions. [2021-02-19 17:27:38,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 21440 states and 63729 transitions. [2021-02-19 17:27:38,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:27:38,873 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:27:38,873 INFO L506 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:27:39,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10528,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:27:39,074 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:27:39,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:27:39,074 INFO L82 PathProgramCache]: Analyzing trace with hash 447398826, now seen corresponding path program 388 times [2021-02-19 17:27:39,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:27:39,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399265233] [2021-02-19 17:27:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:27:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:27:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:27:39,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399265233] [2021-02-19 17:27:39,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146324371] [2021-02-19 17:27:39,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:27:39,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:27:39,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:27:39,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 17:27:39,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:27:39,576 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-02-19 17:27:39,817 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-02-19 17:27:39,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:27:39,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-02-19 17:27:44,464 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 1198 DAG size of output: 980 [2021-02-19 17:27:44,744 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 2159 DAG size of output: 1442 [2021-02-19 17:27:44,939 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 2159 DAG size of output: 1442 [2021-02-19 17:27:45,136 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 2166 DAG size of output: 1449 [2021-02-19 17:27:45,349 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 1451 DAG size of output: 1725 [2021-02-19 17:27:47,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:27:47,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:27:47,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:27:47,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-02-19 17:27:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:27:47,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:27:47,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-02-19 17:27:47,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449288284] [2021-02-19 17:27:47,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:27:47,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:27:47,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:27:47,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:27:47,153 INFO L87 Difference]: Start difference. First operand 21440 states and 63729 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:27:47,567 INFO L93 Difference]: Finished difference Result 21891 states and 64829 transitions. [2021-02-19 17:27:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:27:47,568 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 17:27:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:27:47,596 INFO L225 Difference]: With dead ends: 21891 [2021-02-19 17:27:47,596 INFO L226 Difference]: Without dead ends: 21888 [2021-02-19 17:27:47,596 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:27:47,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21888 states. [2021-02-19 17:27:47,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21888 to 21665. [2021-02-19 17:27:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21665 states, 21664 states have (on average 2.977889586410635) internal successors, (64513), 21664 states have internal predecessors, (64513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21665 states to 21665 states and 64513 transitions. [2021-02-19 17:27:47,900 INFO L78 Accepts]: Start accepts. Automaton has 21665 states and 64513 transitions. Word has length 24 [2021-02-19 17:27:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:27:47,900 INFO L480 AbstractCegarLoop]: Abstraction has 21665 states and 64513 transitions. [2021-02-19 17:27:47,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:27:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand 21665 states and 64513 transitions. [2021-02-19 17:27:47,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:27:47,918 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:27:47,918 INFO L506 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:27:48,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11869 [2021-02-19 17:27:48,119 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:27:48,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:27:48,119 INFO L82 PathProgramCache]: Analyzing trace with hash -595405838, now seen corresponding path program 389 times [2021-02-19 17:27:48,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:27:48,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929638125] [2021-02-19 17:27:48,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:27:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:27:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:27:48,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929638125] [2021-02-19 17:27:48,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970547644] [2021-02-19 17:27:48,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:27:48,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:27:48,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:27:48,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 17:27:48,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:27:48,750 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-02-19 17:27:48,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:27:48,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-02-19 17:27:51,606 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1264 DAG size of output: 1494 [2021-02-19 17:27:55,725 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1361 DAG size of output: 1038 [2021-02-19 17:27:55,891 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1520 DAG size of output: 1148 [2021-02-19 17:27:56,074 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1682 DAG size of output: 1227 [2021-02-19 17:27:56,294 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 2107 DAG size of output: 1546 [2021-02-19 17:27:56,561 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 2783 DAG size of output: 2028 [2021-02-19 17:27:56,982 WARN L202 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 3174 DAG size of output: 2232 [2021-02-19 17:27:57,291 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 3174 DAG size of output: 2232 [2021-02-19 17:27:57,609 WARN L202 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 3180 DAG size of output: 2238 [2021-02-19 17:27:57,982 WARN L202 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 2240 DAG size of output: 2627 [2021-02-19 17:27:58,182 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 1733 DAG size of output: 1711 [2021-02-19 17:27:58,336 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1553 DAG size of output: 1540 [2021-02-19 17:27:58,582 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 1339 DAG size of output: 1313 [2021-02-19 17:27:58,737 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1175 DAG size of output: 1144 [2021-02-19 17:27:59,660 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 2474 DAG size of output: 1051 [2021-02-19 17:27:59,787 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 2474 DAG size of output: 1051 [2021-02-19 17:27:59,915 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 2479 DAG size of output: 1056 [2021-02-19 17:28:00,709 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 93 [2021-02-19 17:28:01,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:28:01,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:28:01,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:28:01,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-02-19 17:28:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:01,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:01,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-02-19 17:28:01,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115644771] [2021-02-19 17:28:01,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:28:01,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:01,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:28:01,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:28:01,214 INFO L87 Difference]: Start difference. First operand 21665 states and 64513 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:01,742 INFO L93 Difference]: Finished difference Result 22132 states and 65636 transitions. [2021-02-19 17:28:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:28:01,743 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 17:28:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:01,769 INFO L225 Difference]: With dead ends: 22132 [2021-02-19 17:28:01,769 INFO L226 Difference]: Without dead ends: 22129 [2021-02-19 17:28:01,769 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:28:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22129 states. [2021-02-19 17:28:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22129 to 21902. [2021-02-19 17:28:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21902 states, 21901 states have (on average 2.9826035340852015) internal successors, (65322), 21901 states have internal predecessors, (65322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21902 states to 21902 states and 65322 transitions. [2021-02-19 17:28:02,082 INFO L78 Accepts]: Start accepts. Automaton has 21902 states and 65322 transitions. Word has length 24 [2021-02-19 17:28:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:02,082 INFO L480 AbstractCegarLoop]: Abstraction has 21902 states and 65322 transitions. [2021-02-19 17:28:02,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 21902 states and 65322 transitions. [2021-02-19 17:28:02,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:28:02,100 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:02,100 INFO L506 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:02,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13587 [2021-02-19 17:28:02,301 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1437387946, now seen corresponding path program 390 times [2021-02-19 17:28:02,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:02,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921479350] [2021-02-19 17:28:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:28:02,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921479350] [2021-02-19 17:28:02,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716911174] [2021-02-19 17:28:02,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:02,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:28:02,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:02,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 17:28:02,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:02,930 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-02-19 17:28:02,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:28:02,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-02-19 17:28:06,196 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1440 DAG size of output: 873 [2021-02-19 17:28:06,325 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1440 DAG size of output: 873 [2021-02-19 17:28:06,574 WARN L202 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 1451 DAG size of output: 884 [2021-02-19 17:28:08,149 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1030 DAG size of output: 820 [2021-02-19 17:28:08,533 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-02-19 17:28:09,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:28:09,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:28:09,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:28:09,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-02-19 17:28:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:09,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:09,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-02-19 17:28:09,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538169763] [2021-02-19 17:28:09,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:28:09,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:09,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:28:09,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:28:09,239 INFO L87 Difference]: Start difference. First operand 21902 states and 65322 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:09,678 INFO L93 Difference]: Finished difference Result 23626 states and 70288 transitions. [2021-02-19 17:28:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:28:09,679 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 17:28:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:09,707 INFO L225 Difference]: With dead ends: 23626 [2021-02-19 17:28:09,707 INFO L226 Difference]: Without dead ends: 23623 [2021-02-19 17:28:09,707 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:28:09,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23623 states. [2021-02-19 17:28:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23623 to 23407. [2021-02-19 17:28:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23407 states, 23406 states have (on average 2.9907715970264035) internal successors, (70002), 23406 states have internal predecessors, (70002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23407 states to 23407 states and 70002 transitions. [2021-02-19 17:28:10,038 INFO L78 Accepts]: Start accepts. Automaton has 23407 states and 70002 transitions. Word has length 24 [2021-02-19 17:28:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:10,038 INFO L480 AbstractCegarLoop]: Abstraction has 23407 states and 70002 transitions. [2021-02-19 17:28:10,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand 23407 states and 70002 transitions. [2021-02-19 17:28:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:28:10,056 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:10,056 INFO L506 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:10,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16762 [2021-02-19 17:28:10,257 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:10,257 INFO L82 PathProgramCache]: Analyzing trace with hash 29485810, now seen corresponding path program 391 times [2021-02-19 17:28:10,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:10,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130216236] [2021-02-19 17:28:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:28:10,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130216236] [2021-02-19 17:28:10,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033076133] [2021-02-19 17:28:10,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:10,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 17:28:10,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:10,892 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-02-19 17:28:10,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:28:10,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-02-19 17:28:12,312 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 473 [2021-02-19 17:28:13,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:28:13,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:28:13,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:28:13,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-02-19 17:28:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:13,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:13,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-02-19 17:28:13,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173820621] [2021-02-19 17:28:13,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:28:13,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:13,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:28:13,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:28:13,990 INFO L87 Difference]: Start difference. First operand 23407 states and 70002 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:14,438 INFO L93 Difference]: Finished difference Result 29436 states and 87774 transitions. [2021-02-19 17:28:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:28:14,439 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 17:28:14,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:14,478 INFO L225 Difference]: With dead ends: 29436 [2021-02-19 17:28:14,479 INFO L226 Difference]: Without dead ends: 29433 [2021-02-19 17:28:14,479 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:28:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29433 states. [2021-02-19 17:28:14,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29433 to 29215. [2021-02-19 17:28:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29215 states, 29214 states have (on average 2.9950023961114534) internal successors, (87496), 29214 states have internal predecessors, (87496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29215 states to 29215 states and 87496 transitions. [2021-02-19 17:28:14,975 INFO L78 Accepts]: Start accepts. Automaton has 29215 states and 87496 transitions. Word has length 24 [2021-02-19 17:28:14,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:14,975 INFO L480 AbstractCegarLoop]: Abstraction has 29215 states and 87496 transitions. [2021-02-19 17:28:14,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:14,975 INFO L276 IsEmpty]: Start isEmpty. Operand 29215 states and 87496 transitions. [2021-02-19 17:28:14,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 17:28:14,999 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:14,999 INFO L506 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:15,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18215 [2021-02-19 17:28:15,199 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:15,203 INFO L82 PathProgramCache]: Analyzing trace with hash -665807446, now seen corresponding path program 392 times [2021-02-19 17:28:15,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:15,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004452498] [2021-02-19 17:28:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:28:15,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004452498] [2021-02-19 17:28:15,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514800117] [2021-02-19 17:28:15,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:15,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:28:15,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:15,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 17:28:15,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:15,859 WARN L202 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-02-19 17:28:15,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:28:15,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-02-19 17:28:17,875 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 2221 DAG size of output: 1943 [2021-02-19 17:28:17,986 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 2221 DAG size of output: 1943 [2021-02-19 17:28:18,265 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 2236 DAG size of output: 1958 [2021-02-19 17:28:20,471 WARN L202 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 1558 DAG size of output: 1056 [2021-02-19 17:28:22,288 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 2753 DAG size of output: 1582 [2021-02-19 17:28:22,454 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 2753 DAG size of output: 1582 [2021-02-19 17:28:22,898 WARN L202 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 2761 DAG size of output: 1781 [2021-02-19 17:28:23,051 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1457 DAG size of output: 1277 [2021-02-19 17:28:25,268 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 176 [2021-02-19 17:28:25,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:28:25,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:28:25,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:28:25,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-02-19 17:28:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:25,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:25,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-02-19 17:28:25,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969606061] [2021-02-19 17:28:25,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 17:28:25,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:25,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 17:28:25,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:28:25,834 INFO L87 Difference]: Start difference. First operand 29215 states and 87496 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:26,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:26,471 INFO L93 Difference]: Finished difference Result 34668 states and 103513 transitions. [2021-02-19 17:28:26,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:28:26,472 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 17:28:26,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:26,523 INFO L225 Difference]: With dead ends: 34668 [2021-02-19 17:28:26,523 INFO L226 Difference]: Without dead ends: 34665 [2021-02-19 17:28:26,523 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:28:26,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34665 states. [2021-02-19 17:28:26,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34665 to 34455. [2021-02-19 17:28:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34455 states, 34454 states have (on average 2.9966622162883847) internal successors, (103247), 34454 states have internal predecessors, (103247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:27,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34455 states to 34455 states and 103247 transitions. [2021-02-19 17:28:27,018 INFO L78 Accepts]: Start accepts. Automaton has 34455 states and 103247 transitions. Word has length 24 [2021-02-19 17:28:27,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:27,018 INFO L480 AbstractCegarLoop]: Abstraction has 34455 states and 103247 transitions. [2021-02-19 17:28:27,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:27,018 INFO L276 IsEmpty]: Start isEmpty. Operand 34455 states and 103247 transitions. [2021-02-19 17:28:27,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:27,049 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:27,049 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:27,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19116 [2021-02-19 17:28:27,250 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:27,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1507642544, now seen corresponding path program 393 times [2021-02-19 17:28:27,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:27,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015668464] [2021-02-19 17:28:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:27,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015668464] [2021-02-19 17:28:27,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030783200] [2021-02-19 17:28:27,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:27,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:28:27,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:27,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:27,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:27,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:27,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-02-19 17:28:27,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273592630] [2021-02-19 17:28:27,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:28:27,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:27,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:28:27,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:28:27,575 INFO L87 Difference]: Start difference. First operand 34455 states and 103247 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:27,938 INFO L93 Difference]: Finished difference Result 34676 states and 103573 transitions. [2021-02-19 17:28:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:28:27,939 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:27,988 INFO L225 Difference]: With dead ends: 34676 [2021-02-19 17:28:27,988 INFO L226 Difference]: Without dead ends: 34676 [2021-02-19 17:28:27,988 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=412, Invalid=848, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 17:28:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34676 states. [2021-02-19 17:28:28,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34676 to 34415. [2021-02-19 17:28:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34415 states, 34414 states have (on average 2.996338699366537) internal successors, (103116), 34414 states have internal predecessors, (103116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:28,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34415 states to 34415 states and 103116 transitions. [2021-02-19 17:28:28,615 INFO L78 Accepts]: Start accepts. Automaton has 34415 states and 103116 transitions. Word has length 25 [2021-02-19 17:28:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:28,615 INFO L480 AbstractCegarLoop]: Abstraction has 34415 states and 103116 transitions. [2021-02-19 17:28:28,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 34415 states and 103116 transitions. [2021-02-19 17:28:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:28,646 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:28,646 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:28,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21786,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:28,846 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:28,846 INFO L82 PathProgramCache]: Analyzing trace with hash 586606695, now seen corresponding path program 394 times [2021-02-19 17:28:28,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:28,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371865604] [2021-02-19 17:28:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:28,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371865604] [2021-02-19 17:28:28,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521196623] [2021-02-19 17:28:28,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:29,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:28:29,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:29,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:29,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:29,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-02-19 17:28:29,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759377662] [2021-02-19 17:28:29,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:28:29,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:29,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:28:29,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:28:29,071 INFO L87 Difference]: Start difference. First operand 34415 states and 103116 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:29,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:29,547 INFO L93 Difference]: Finished difference Result 35045 states and 104076 transitions. [2021-02-19 17:28:29,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 17:28:29,547 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:29,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:29,600 INFO L225 Difference]: With dead ends: 35045 [2021-02-19 17:28:29,600 INFO L226 Difference]: Without dead ends: 35032 [2021-02-19 17:28:29,601 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:28:29,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35032 states. [2021-02-19 17:28:30,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35032 to 34457. [2021-02-19 17:28:30,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34457 states, 34456 states have (on average 2.99529835152078) internal successors, (103206), 34456 states have internal predecessors, (103206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34457 states to 34457 states and 103206 transitions. [2021-02-19 17:28:30,340 INFO L78 Accepts]: Start accepts. Automaton has 34457 states and 103206 transitions. Word has length 25 [2021-02-19 17:28:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:30,340 INFO L480 AbstractCegarLoop]: Abstraction has 34457 states and 103206 transitions. [2021-02-19 17:28:30,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 34457 states and 103206 transitions. [2021-02-19 17:28:30,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:30,369 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:30,369 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:30,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21787 [2021-02-19 17:28:30,570 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:30,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:30,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1630510418, now seen corresponding path program 395 times [2021-02-19 17:28:30,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:30,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058530619] [2021-02-19 17:28:30,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:30,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058530619] [2021-02-19 17:28:30,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385517550] [2021-02-19 17:28:30,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:30,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:28:30,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:30,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 56 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:30,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:30,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:28:30,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236616227] [2021-02-19 17:28:30,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:28:30,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:30,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:28:30,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:28:30,775 INFO L87 Difference]: Start difference. First operand 34457 states and 103206 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:31,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:31,188 INFO L93 Difference]: Finished difference Result 34504 states and 103273 transitions. [2021-02-19 17:28:31,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:28:31,189 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:31,237 INFO L225 Difference]: With dead ends: 34504 [2021-02-19 17:28:31,238 INFO L226 Difference]: Without dead ends: 34503 [2021-02-19 17:28:31,238 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:28:31,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34503 states. [2021-02-19 17:28:31,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34503 to 34457. [2021-02-19 17:28:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34457 states, 34456 states have (on average 2.9952403064778266) internal successors, (103204), 34456 states have internal predecessors, (103204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:31,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34457 states to 34457 states and 103204 transitions. [2021-02-19 17:28:31,781 INFO L78 Accepts]: Start accepts. Automaton has 34457 states and 103204 transitions. Word has length 25 [2021-02-19 17:28:31,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:31,781 INFO L480 AbstractCegarLoop]: Abstraction has 34457 states and 103204 transitions. [2021-02-19 17:28:31,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:31,781 INFO L276 IsEmpty]: Start isEmpty. Operand 34457 states and 103204 transitions. [2021-02-19 17:28:31,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:31,811 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:31,811 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:32,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21788 [2021-02-19 17:28:32,011 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:32,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1747400525, now seen corresponding path program 396 times [2021-02-19 17:28:32,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:32,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450266742] [2021-02-19 17:28:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:32,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450266742] [2021-02-19 17:28:32,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259701834] [2021-02-19 17:28:32,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:32,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:28:32,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:32,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:32,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:32,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:32,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:28:32,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214028850] [2021-02-19 17:28:32,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:28:32,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:32,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:28:32,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:28:32,186 INFO L87 Difference]: Start difference. First operand 34457 states and 103204 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:32,496 INFO L93 Difference]: Finished difference Result 35816 states and 106333 transitions. [2021-02-19 17:28:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:28:32,497 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:32,548 INFO L225 Difference]: With dead ends: 35816 [2021-02-19 17:28:32,548 INFO L226 Difference]: Without dead ends: 35816 [2021-02-19 17:28:32,548 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:28:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35816 states. [2021-02-19 17:28:33,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35816 to 34428. [2021-02-19 17:28:33,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34428 states, 34427 states have (on average 2.994626310744474) internal successors, (103096), 34427 states have internal predecessors, (103096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34428 states to 34428 states and 103096 transitions. [2021-02-19 17:28:33,189 INFO L78 Accepts]: Start accepts. Automaton has 34428 states and 103096 transitions. Word has length 25 [2021-02-19 17:28:33,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:33,189 INFO L480 AbstractCegarLoop]: Abstraction has 34428 states and 103096 transitions. [2021-02-19 17:28:33,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 34428 states and 103096 transitions. [2021-02-19 17:28:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:33,216 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:33,216 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:33,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21789,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:33,417 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:33,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:33,417 INFO L82 PathProgramCache]: Analyzing trace with hash 881260968, now seen corresponding path program 397 times [2021-02-19 17:28:33,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:33,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595120233] [2021-02-19 17:28:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:33,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595120233] [2021-02-19 17:28:33,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908606022] [2021-02-19 17:28:33,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:33,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:33,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:28:33,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:33,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:28:33,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893763220] [2021-02-19 17:28:33,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:28:33,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:33,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:28:33,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:28:33,583 INFO L87 Difference]: Start difference. First operand 34428 states and 103096 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:33,853 INFO L93 Difference]: Finished difference Result 34916 states and 104020 transitions. [2021-02-19 17:28:33,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:28:33,854 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:33,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:34,069 INFO L225 Difference]: With dead ends: 34916 [2021-02-19 17:28:34,069 INFO L226 Difference]: Without dead ends: 34916 [2021-02-19 17:28:34,069 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:28:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34916 states. [2021-02-19 17:28:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34916 to 34475. [2021-02-19 17:28:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34475 states, 34474 states have (on average 2.9947496664152693) internal successors, (103241), 34474 states have internal predecessors, (103241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34475 states to 34475 states and 103241 transitions. [2021-02-19 17:28:34,617 INFO L78 Accepts]: Start accepts. Automaton has 34475 states and 103241 transitions. Word has length 25 [2021-02-19 17:28:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:34,617 INFO L480 AbstractCegarLoop]: Abstraction has 34475 states and 103241 transitions. [2021-02-19 17:28:34,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 34475 states and 103241 transitions. [2021-02-19 17:28:34,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:34,646 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:34,646 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:34,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21790,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:34,847 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:34,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:34,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1826022951, now seen corresponding path program 398 times [2021-02-19 17:28:34,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:34,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702356063] [2021-02-19 17:28:34,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:34,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702356063] [2021-02-19 17:28:34,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312171982] [2021-02-19 17:28:34,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:34,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:28:34,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:34,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:34,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:28:35,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:35,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:28:35,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715748341] [2021-02-19 17:28:35,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:28:35,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:35,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:28:35,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:28:35,006 INFO L87 Difference]: Start difference. First operand 34475 states and 103241 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:35,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:35,302 INFO L93 Difference]: Finished difference Result 35031 states and 104064 transitions. [2021-02-19 17:28:35,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:28:35,303 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:35,350 INFO L225 Difference]: With dead ends: 35031 [2021-02-19 17:28:35,350 INFO L226 Difference]: Without dead ends: 35029 [2021-02-19 17:28:35,350 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:28:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35029 states. [2021-02-19 17:28:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35029 to 34487. [2021-02-19 17:28:35,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34487 states, 34486 states have (on average 2.994954474279418) internal successors, (103284), 34486 states have internal predecessors, (103284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:36,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34487 states to 34487 states and 103284 transitions. [2021-02-19 17:28:36,031 INFO L78 Accepts]: Start accepts. Automaton has 34487 states and 103284 transitions. Word has length 25 [2021-02-19 17:28:36,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:36,032 INFO L480 AbstractCegarLoop]: Abstraction has 34487 states and 103284 transitions. [2021-02-19 17:28:36,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:36,032 INFO L276 IsEmpty]: Start isEmpty. Operand 34487 states and 103284 transitions. [2021-02-19 17:28:36,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:36,059 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:36,059 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:36,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21791,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:36,260 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:36,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1668251638, now seen corresponding path program 399 times [2021-02-19 17:28:36,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:36,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075628036] [2021-02-19 17:28:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:36,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075628036] [2021-02-19 17:28:36,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349414228] [2021-02-19 17:28:36,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:36,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:28:36,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:36,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:36,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:36,558 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-02-19 17:28:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:36,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:36,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:28:36,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165168370] [2021-02-19 17:28:36,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:28:36,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:36,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:28:36,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:28:36,612 INFO L87 Difference]: Start difference. First operand 34487 states and 103284 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:36,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:36,994 INFO L93 Difference]: Finished difference Result 34738 states and 103670 transitions. [2021-02-19 17:28:36,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:28:36,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:36,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:37,042 INFO L225 Difference]: With dead ends: 34738 [2021-02-19 17:28:37,042 INFO L226 Difference]: Without dead ends: 34736 [2021-02-19 17:28:37,042 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:28:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34736 states. [2021-02-19 17:28:37,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34736 to 34457. [2021-02-19 17:28:37,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34457 states, 34456 states have (on average 2.994717901091247) internal successors, (103186), 34456 states have internal predecessors, (103186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34457 states to 34457 states and 103186 transitions. [2021-02-19 17:28:37,633 INFO L78 Accepts]: Start accepts. Automaton has 34457 states and 103186 transitions. Word has length 25 [2021-02-19 17:28:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:37,633 INFO L480 AbstractCegarLoop]: Abstraction has 34457 states and 103186 transitions. [2021-02-19 17:28:37,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:37,633 INFO L276 IsEmpty]: Start isEmpty. Operand 34457 states and 103186 transitions. [2021-02-19 17:28:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:37,663 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:37,663 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:37,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21792,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:37,864 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:37,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:37,864 INFO L82 PathProgramCache]: Analyzing trace with hash -751195285, now seen corresponding path program 400 times [2021-02-19 17:28:37,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:37,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360788995] [2021-02-19 17:28:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:37,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360788995] [2021-02-19 17:28:37,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311050298] [2021-02-19 17:28:37,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:37,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:28:37,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:37,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:37,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:38,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:38,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:28:38,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353843064] [2021-02-19 17:28:38,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:28:38,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:38,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:28:38,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:28:38,026 INFO L87 Difference]: Start difference. First operand 34457 states and 103186 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:38,198 INFO L93 Difference]: Finished difference Result 35497 states and 105280 transitions. [2021-02-19 17:28:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:28:38,199 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:38,245 INFO L225 Difference]: With dead ends: 35497 [2021-02-19 17:28:38,245 INFO L226 Difference]: Without dead ends: 35497 [2021-02-19 17:28:38,245 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:28:38,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35497 states. [2021-02-19 17:28:38,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35497 to 34462. [2021-02-19 17:28:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34462 states, 34461 states have (on average 2.9946606308580717) internal successors, (103199), 34461 states have internal predecessors, (103199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:38,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34462 states to 34462 states and 103199 transitions. [2021-02-19 17:28:38,849 INFO L78 Accepts]: Start accepts. Automaton has 34462 states and 103199 transitions. Word has length 25 [2021-02-19 17:28:38,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:38,849 INFO L480 AbstractCegarLoop]: Abstraction has 34462 states and 103199 transitions. [2021-02-19 17:28:38,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:38,849 INFO L276 IsEmpty]: Start isEmpty. Operand 34462 states and 103199 transitions. [2021-02-19 17:28:38,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:38,878 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:38,878 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:39,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21793 [2021-02-19 17:28:39,078 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:39,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:39,078 INFO L82 PathProgramCache]: Analyzing trace with hash 42361670, now seen corresponding path program 401 times [2021-02-19 17:28:39,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:39,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939903538] [2021-02-19 17:28:39,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:39,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939903538] [2021-02-19 17:28:39,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618888524] [2021-02-19 17:28:39,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:39,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:28:39,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:39,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:39,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:39,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:39,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:28:39,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431461392] [2021-02-19 17:28:39,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:28:39,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:39,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:28:39,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:28:39,247 INFO L87 Difference]: Start difference. First operand 34462 states and 103199 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:39,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:39,747 INFO L93 Difference]: Finished difference Result 34689 states and 103554 transitions. [2021-02-19 17:28:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:28:39,747 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:39,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:39,800 INFO L225 Difference]: With dead ends: 34689 [2021-02-19 17:28:39,801 INFO L226 Difference]: Without dead ends: 34687 [2021-02-19 17:28:39,801 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:28:39,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34687 states. [2021-02-19 17:28:40,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34687 to 34462. [2021-02-19 17:28:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34462 states, 34461 states have (on average 2.9946025942369636) internal successors, (103197), 34461 states have internal predecessors, (103197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34462 states to 34462 states and 103197 transitions. [2021-02-19 17:28:40,562 INFO L78 Accepts]: Start accepts. Automaton has 34462 states and 103197 transitions. Word has length 25 [2021-02-19 17:28:40,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:40,563 INFO L480 AbstractCegarLoop]: Abstraction has 34462 states and 103197 transitions. [2021-02-19 17:28:40,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:40,563 INFO L276 IsEmpty]: Start isEmpty. Operand 34462 states and 103197 transitions. [2021-02-19 17:28:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:40,593 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:40,593 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:40,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21794 [2021-02-19 17:28:40,793 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:40,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:40,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1814724677, now seen corresponding path program 402 times [2021-02-19 17:28:40,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:40,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359622420] [2021-02-19 17:28:40,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:40,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359622420] [2021-02-19 17:28:40,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259245056] [2021-02-19 17:28:40,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:40,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:28:40,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:40,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:40,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:40,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:40,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:28:40,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597994724] [2021-02-19 17:28:40,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:28:40,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:40,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:28:40,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:28:40,972 INFO L87 Difference]: Start difference. First operand 34462 states and 103197 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:41,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:41,175 INFO L93 Difference]: Finished difference Result 37168 states and 110065 transitions. [2021-02-19 17:28:41,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:28:41,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:41,232 INFO L225 Difference]: With dead ends: 37168 [2021-02-19 17:28:41,232 INFO L226 Difference]: Without dead ends: 37168 [2021-02-19 17:28:41,232 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:28:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37168 states. [2021-02-19 17:28:41,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37168 to 34431. [2021-02-19 17:28:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34431 states, 34430 states have (on average 2.9939878013360444) internal successors, (103083), 34430 states have internal predecessors, (103083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:41,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34431 states to 34431 states and 103083 transitions. [2021-02-19 17:28:41,919 INFO L78 Accepts]: Start accepts. Automaton has 34431 states and 103083 transitions. Word has length 25 [2021-02-19 17:28:41,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:41,919 INFO L480 AbstractCegarLoop]: Abstraction has 34431 states and 103083 transitions. [2021-02-19 17:28:41,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 34431 states and 103083 transitions. [2021-02-19 17:28:41,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:41,952 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:41,952 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:42,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21795 [2021-02-19 17:28:42,152 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:42,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:42,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1698852336, now seen corresponding path program 403 times [2021-02-19 17:28:42,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:42,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074375506] [2021-02-19 17:28:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:42,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074375506] [2021-02-19 17:28:42,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323696550] [2021-02-19 17:28:42,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:42,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:28:42,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:42,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:28:42,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506029133] [2021-02-19 17:28:42,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:28:42,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:42,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:28:42,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:28:42,315 INFO L87 Difference]: Start difference. First operand 34431 states and 103083 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:42,584 INFO L93 Difference]: Finished difference Result 35019 states and 104185 transitions. [2021-02-19 17:28:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:28:42,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:42,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:42,634 INFO L225 Difference]: With dead ends: 35019 [2021-02-19 17:28:42,634 INFO L226 Difference]: Without dead ends: 35019 [2021-02-19 17:28:42,634 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:28:42,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35019 states. [2021-02-19 17:28:43,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35019 to 34456. [2021-02-19 17:28:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34456 states, 34455 states have (on average 2.994224350602235) internal successors, (103166), 34455 states have internal predecessors, (103166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34456 states to 34456 states and 103166 transitions. [2021-02-19 17:28:43,254 INFO L78 Accepts]: Start accepts. Automaton has 34456 states and 103166 transitions. Word has length 25 [2021-02-19 17:28:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:43,254 INFO L480 AbstractCegarLoop]: Abstraction has 34456 states and 103166 transitions. [2021-02-19 17:28:43,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 34456 states and 103166 transitions. [2021-02-19 17:28:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:43,283 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:43,283 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:43,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21796 [2021-02-19 17:28:43,483 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:43,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1651352977, now seen corresponding path program 404 times [2021-02-19 17:28:43,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:43,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782239980] [2021-02-19 17:28:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:43,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782239980] [2021-02-19 17:28:43,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955985754] [2021-02-19 17:28:43,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:43,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:28:43,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:43,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:43,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:28:43,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:43,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:28:43,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993459069] [2021-02-19 17:28:43,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:28:43,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:43,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:28:43,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:28:43,635 INFO L87 Difference]: Start difference. First operand 34456 states and 103166 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:44,152 INFO L93 Difference]: Finished difference Result 35025 states and 104010 transitions. [2021-02-19 17:28:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:28:44,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:44,200 INFO L225 Difference]: With dead ends: 35025 [2021-02-19 17:28:44,200 INFO L226 Difference]: Without dead ends: 35023 [2021-02-19 17:28:44,200 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:28:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35023 states. [2021-02-19 17:28:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35023 to 34470. [2021-02-19 17:28:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34470 states, 34469 states have (on average 2.9944007659055965) internal successors, (103214), 34469 states have internal predecessors, (103214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34470 states to 34470 states and 103214 transitions. [2021-02-19 17:28:44,821 INFO L78 Accepts]: Start accepts. Automaton has 34470 states and 103214 transitions. Word has length 25 [2021-02-19 17:28:44,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:44,821 INFO L480 AbstractCegarLoop]: Abstraction has 34470 states and 103214 transitions. [2021-02-19 17:28:44,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 34470 states and 103214 transitions. [2021-02-19 17:28:45,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:45,010 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:45,010 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:45,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21797 [2021-02-19 17:28:45,210 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:45,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:45,210 INFO L82 PathProgramCache]: Analyzing trace with hash -850660270, now seen corresponding path program 405 times [2021-02-19 17:28:45,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:45,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338746822] [2021-02-19 17:28:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:28:45,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338746822] [2021-02-19 17:28:45,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724367] [2021-02-19 17:28:45,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:45,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:28:45,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:45,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:45,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:28:45,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:45,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:28:45,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857496917] [2021-02-19 17:28:45,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:28:45,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:45,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:28:45,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:28:45,371 INFO L87 Difference]: Start difference. First operand 34470 states and 103214 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:45,687 INFO L93 Difference]: Finished difference Result 34771 states and 103678 transitions. [2021-02-19 17:28:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:28:45,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:45,739 INFO L225 Difference]: With dead ends: 34771 [2021-02-19 17:28:45,740 INFO L226 Difference]: Without dead ends: 34769 [2021-02-19 17:28:45,740 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:28:45,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34769 states. [2021-02-19 17:28:46,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34769 to 34440. [2021-02-19 17:28:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34440 states, 34439 states have (on average 2.9941926304480386) internal successors, (103117), 34439 states have internal predecessors, (103117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34440 states to 34440 states and 103117 transitions. [2021-02-19 17:28:46,378 INFO L78 Accepts]: Start accepts. Automaton has 34440 states and 103117 transitions. Word has length 25 [2021-02-19 17:28:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:46,378 INFO L480 AbstractCegarLoop]: Abstraction has 34440 states and 103117 transitions. [2021-02-19 17:28:46,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 34440 states and 103117 transitions. [2021-02-19 17:28:46,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:46,406 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:46,406 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:46,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21798 [2021-02-19 17:28:46,606 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:46,606 INFO L82 PathProgramCache]: Analyzing trace with hash 66396083, now seen corresponding path program 406 times [2021-02-19 17:28:46,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:46,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135511047] [2021-02-19 17:28:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:28:46,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135511047] [2021-02-19 17:28:46,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584266748] [2021-02-19 17:28:46,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:46,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:28:46,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:46,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:46,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:28:46,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:46,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:28:46,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352928965] [2021-02-19 17:28:46,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:28:46,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:46,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:28:46,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:28:46,763 INFO L87 Difference]: Start difference. First operand 34440 states and 103117 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:46,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:46,926 INFO L93 Difference]: Finished difference Result 34999 states and 103884 transitions. [2021-02-19 17:28:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:28:46,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:46,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:46,973 INFO L225 Difference]: With dead ends: 34999 [2021-02-19 17:28:46,973 INFO L226 Difference]: Without dead ends: 34999 [2021-02-19 17:28:46,973 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:28:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34999 states. [2021-02-19 17:28:47,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34999 to 34428. [2021-02-19 17:28:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34428 states, 34427 states have (on average 2.9936968077381123) internal successors, (103064), 34427 states have internal predecessors, (103064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34428 states to 34428 states and 103064 transitions. [2021-02-19 17:28:47,584 INFO L78 Accepts]: Start accepts. Automaton has 34428 states and 103064 transitions. Word has length 25 [2021-02-19 17:28:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:47,584 INFO L480 AbstractCegarLoop]: Abstraction has 34428 states and 103064 transitions. [2021-02-19 17:28:47,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 34428 states and 103064 transitions. [2021-02-19 17:28:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:47,613 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:47,614 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:47,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21799,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:47,814 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:47,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:47,814 INFO L82 PathProgramCache]: Analyzing trace with hash 859953038, now seen corresponding path program 407 times [2021-02-19 17:28:47,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:47,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073135205] [2021-02-19 17:28:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:47,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073135205] [2021-02-19 17:28:47,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097295685] [2021-02-19 17:28:47,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:47,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:28:47,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:47,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:47,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:47,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:47,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:28:47,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378255944] [2021-02-19 17:28:47,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:28:47,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:47,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:28:47,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:28:47,978 INFO L87 Difference]: Start difference. First operand 34428 states and 103064 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:48,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:48,352 INFO L93 Difference]: Finished difference Result 34724 states and 103525 transitions. [2021-02-19 17:28:48,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:28:48,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:48,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:48,406 INFO L225 Difference]: With dead ends: 34724 [2021-02-19 17:28:48,406 INFO L226 Difference]: Without dead ends: 34722 [2021-02-19 17:28:48,406 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:28:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34722 states. [2021-02-19 17:28:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34722 to 34428. [2021-02-19 17:28:49,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34428 states, 34427 states have (on average 2.9936387138002147) internal successors, (103062), 34427 states have internal predecessors, (103062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34428 states to 34428 states and 103062 transitions. [2021-02-19 17:28:49,128 INFO L78 Accepts]: Start accepts. Automaton has 34428 states and 103062 transitions. Word has length 25 [2021-02-19 17:28:49,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:49,128 INFO L480 AbstractCegarLoop]: Abstraction has 34428 states and 103062 transitions. [2021-02-19 17:28:49,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:49,128 INFO L276 IsEmpty]: Start isEmpty. Operand 34428 states and 103062 transitions. [2021-02-19 17:28:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:49,158 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:49,158 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:49,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21800,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:49,358 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:49,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1662651251, now seen corresponding path program 408 times [2021-02-19 17:28:49,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:49,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415431011] [2021-02-19 17:28:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:49,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415431011] [2021-02-19 17:28:49,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896953847] [2021-02-19 17:28:49,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:49,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:28:49,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:49,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:49,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:49,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:49,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:28:49,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019599879] [2021-02-19 17:28:49,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:28:49,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:49,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:28:49,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:28:49,538 INFO L87 Difference]: Start difference. First operand 34428 states and 103062 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:49,761 INFO L93 Difference]: Finished difference Result 36466 states and 108000 transitions. [2021-02-19 17:28:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:28:49,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:49,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:49,811 INFO L225 Difference]: With dead ends: 36466 [2021-02-19 17:28:49,811 INFO L226 Difference]: Without dead ends: 36466 [2021-02-19 17:28:49,811 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:28:49,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36466 states. [2021-02-19 17:28:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36466 to 34442. [2021-02-19 17:28:50,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34442 states, 34441 states have (on average 2.993583229290671) internal successors, (103102), 34441 states have internal predecessors, (103102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34442 states to 34442 states and 103102 transitions. [2021-02-19 17:28:50,525 INFO L78 Accepts]: Start accepts. Automaton has 34442 states and 103102 transitions. Word has length 25 [2021-02-19 17:28:50,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:50,525 INFO L480 AbstractCegarLoop]: Abstraction has 34442 states and 103102 transitions. [2021-02-19 17:28:50,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:50,525 INFO L276 IsEmpty]: Start isEmpty. Operand 34442 states and 103102 transitions. [2021-02-19 17:28:50,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:50,556 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:50,556 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:50,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21801,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:50,757 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:50,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:50,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1945609262, now seen corresponding path program 409 times [2021-02-19 17:28:50,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:50,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17824300] [2021-02-19 17:28:50,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:50,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17824300] [2021-02-19 17:28:50,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012352984] [2021-02-19 17:28:50,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:50,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:50,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:50,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:50,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:28:50,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563665214] [2021-02-19 17:28:50,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:28:50,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:50,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:28:50,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:28:50,926 INFO L87 Difference]: Start difference. First operand 34442 states and 103102 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:51,226 INFO L93 Difference]: Finished difference Result 34841 states and 103994 transitions. [2021-02-19 17:28:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:28:51,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:51,273 INFO L225 Difference]: With dead ends: 34841 [2021-02-19 17:28:51,273 INFO L226 Difference]: Without dead ends: 34838 [2021-02-19 17:28:51,273 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:28:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34838 states. [2021-02-19 17:28:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34838 to 34445. [2021-02-19 17:28:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34445 states, 34444 states have (on average 2.993525722912554) internal successors, (103109), 34444 states have internal predecessors, (103109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34445 states to 34445 states and 103109 transitions. [2021-02-19 17:28:51,892 INFO L78 Accepts]: Start accepts. Automaton has 34445 states and 103109 transitions. Word has length 25 [2021-02-19 17:28:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:51,892 INFO L480 AbstractCegarLoop]: Abstraction has 34445 states and 103109 transitions. [2021-02-19 17:28:51,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 34445 states and 103109 transitions. [2021-02-19 17:28:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:51,921 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:51,921 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:52,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21802,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:52,121 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:52,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:52,122 INFO L82 PathProgramCache]: Analyzing trace with hash 571456243, now seen corresponding path program 410 times [2021-02-19 17:28:52,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:52,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555229325] [2021-02-19 17:28:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:52,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555229325] [2021-02-19 17:28:52,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072158194] [2021-02-19 17:28:52,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:52,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:28:52,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:52,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:52,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:52,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:52,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:28:52,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892862042] [2021-02-19 17:28:52,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:28:52,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:52,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:28:52,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:28:52,295 INFO L87 Difference]: Start difference. First operand 34445 states and 103109 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:52,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:52,540 INFO L93 Difference]: Finished difference Result 46459 states and 138425 transitions. [2021-02-19 17:28:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:28:52,541 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:52,763 INFO L225 Difference]: With dead ends: 46459 [2021-02-19 17:28:52,763 INFO L226 Difference]: Without dead ends: 46459 [2021-02-19 17:28:52,763 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:28:52,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46459 states. [2021-02-19 17:28:53,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46459 to 43950. [2021-02-19 17:28:53,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43950 states, 43949 states have (on average 3.009351748617716) internal successors, (132258), 43949 states have internal predecessors, (132258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:53,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43950 states to 43950 states and 132258 transitions. [2021-02-19 17:28:53,580 INFO L78 Accepts]: Start accepts. Automaton has 43950 states and 132258 transitions. Word has length 25 [2021-02-19 17:28:53,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:53,580 INFO L480 AbstractCegarLoop]: Abstraction has 43950 states and 132258 transitions. [2021-02-19 17:28:53,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:53,580 INFO L276 IsEmpty]: Start isEmpty. Operand 43950 states and 132258 transitions. [2021-02-19 17:28:53,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:53,614 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:53,614 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:53,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21803 [2021-02-19 17:28:53,814 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:53,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:53,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1757087163, now seen corresponding path program 411 times [2021-02-19 17:28:53,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:53,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161789187] [2021-02-19 17:28:53,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:28:53,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161789187] [2021-02-19 17:28:53,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303227313] [2021-02-19 17:28:53,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:53,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:28:53,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:53,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:28:53,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:53,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:28:53,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166609662] [2021-02-19 17:28:53,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:28:53,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:53,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:28:53,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:28:53,971 INFO L87 Difference]: Start difference. First operand 43950 states and 132258 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:54,310 INFO L93 Difference]: Finished difference Result 44512 states and 133166 transitions. [2021-02-19 17:28:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:28:54,311 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:54,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:54,376 INFO L225 Difference]: With dead ends: 44512 [2021-02-19 17:28:54,376 INFO L226 Difference]: Without dead ends: 44508 [2021-02-19 17:28:54,376 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:28:54,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44508 states. [2021-02-19 17:28:55,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44508 to 44013. [2021-02-19 17:28:55,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44013 states, 44012 states have (on average 3.010019994546942) internal successors, (132477), 44012 states have internal predecessors, (132477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44013 states to 44013 states and 132477 transitions. [2021-02-19 17:28:55,249 INFO L78 Accepts]: Start accepts. Automaton has 44013 states and 132477 transitions. Word has length 25 [2021-02-19 17:28:55,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:55,249 INFO L480 AbstractCegarLoop]: Abstraction has 44013 states and 132477 transitions. [2021-02-19 17:28:55,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:55,249 INFO L276 IsEmpty]: Start isEmpty. Operand 44013 states and 132477 transitions. [2021-02-19 17:28:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:55,287 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:55,287 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:55,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21804,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:55,487 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:55,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1863734364, now seen corresponding path program 412 times [2021-02-19 17:28:55,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:55,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911144507] [2021-02-19 17:28:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:55,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911144507] [2021-02-19 17:28:55,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551235414] [2021-02-19 17:28:55,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:55,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:28:55,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:55,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:55,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:55,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:55,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:28:55,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610043492] [2021-02-19 17:28:55,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:28:55,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:55,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:28:55,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:28:55,653 INFO L87 Difference]: Start difference. First operand 44013 states and 132477 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:55,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:55,963 INFO L93 Difference]: Finished difference Result 44236 states and 132859 transitions. [2021-02-19 17:28:55,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:28:55,964 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:55,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:56,029 INFO L225 Difference]: With dead ends: 44236 [2021-02-19 17:28:56,029 INFO L226 Difference]: Without dead ends: 44230 [2021-02-19 17:28:56,029 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:28:56,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44230 states. [2021-02-19 17:28:56,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44230 to 44002. [2021-02-19 17:28:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44002 states, 44001 states have (on average 3.0101134065134882) internal successors, (132448), 44001 states have internal predecessors, (132448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44002 states to 44002 states and 132448 transitions. [2021-02-19 17:28:56,945 INFO L78 Accepts]: Start accepts. Automaton has 44002 states and 132448 transitions. Word has length 25 [2021-02-19 17:28:56,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:56,945 INFO L480 AbstractCegarLoop]: Abstraction has 44002 states and 132448 transitions. [2021-02-19 17:28:56,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:56,945 INFO L276 IsEmpty]: Start isEmpty. Operand 44002 states and 132448 transitions. [2021-02-19 17:28:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:56,981 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:56,981 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:57,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21805,414 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:57,182 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:57,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:57,182 INFO L82 PathProgramCache]: Analyzing trace with hash 653331141, now seen corresponding path program 413 times [2021-02-19 17:28:57,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:57,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170355918] [2021-02-19 17:28:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:57,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170355918] [2021-02-19 17:28:57,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248483538] [2021-02-19 17:28:57,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:57,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:28:57,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:57,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:57,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:57,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:57,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:28:57,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150201022] [2021-02-19 17:28:57,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:28:57,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:57,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:28:57,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:28:57,352 INFO L87 Difference]: Start difference. First operand 44002 states and 132448 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:57,892 INFO L93 Difference]: Finished difference Result 48750 states and 145356 transitions. [2021-02-19 17:28:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:28:57,892 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:57,964 INFO L225 Difference]: With dead ends: 48750 [2021-02-19 17:28:57,964 INFO L226 Difference]: Without dead ends: 48750 [2021-02-19 17:28:57,965 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:28:57,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48750 states. [2021-02-19 17:28:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48750 to 34538. [2021-02-19 17:28:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34538 states, 34537 states have (on average 2.996583374352144) internal successors, (103493), 34537 states have internal predecessors, (103493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34538 states to 34538 states and 103493 transitions. [2021-02-19 17:28:58,562 INFO L78 Accepts]: Start accepts. Automaton has 34538 states and 103493 transitions. Word has length 25 [2021-02-19 17:28:58,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:28:58,562 INFO L480 AbstractCegarLoop]: Abstraction has 34538 states and 103493 transitions. [2021-02-19 17:28:58,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:58,562 INFO L276 IsEmpty]: Start isEmpty. Operand 34538 states and 103493 transitions. [2021-02-19 17:28:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:28:58,811 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:28:58,811 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:28:59,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21806,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:59,011 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:28:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:28:59,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1274380968, now seen corresponding path program 414 times [2021-02-19 17:28:59,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:28:59,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309246581] [2021-02-19 17:28:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:28:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:28:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:28:59,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309246581] [2021-02-19 17:28:59,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135572816] [2021-02-19 17:28:59,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:28:59,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:28:59,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:28:59,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:28:59,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:28:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:28:59,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:28:59,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:28:59,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211565284] [2021-02-19 17:28:59,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:28:59,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:28:59,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:28:59,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:28:59,184 INFO L87 Difference]: Start difference. First operand 34538 states and 103493 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:28:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:28:59,442 INFO L93 Difference]: Finished difference Result 35210 states and 104779 transitions. [2021-02-19 17:28:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:28:59,443 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:28:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:28:59,498 INFO L225 Difference]: With dead ends: 35210 [2021-02-19 17:28:59,499 INFO L226 Difference]: Without dead ends: 35210 [2021-02-19 17:28:59,499 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:28:59,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35210 states. [2021-02-19 17:29:00,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35210 to 34589. [2021-02-19 17:29:00,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34589 states, 34588 states have (on average 2.996732970972592) internal successors, (103651), 34588 states have internal predecessors, (103651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34589 states to 34589 states and 103651 transitions. [2021-02-19 17:29:00,347 INFO L78 Accepts]: Start accepts. Automaton has 34589 states and 103651 transitions. Word has length 25 [2021-02-19 17:29:00,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:00,347 INFO L480 AbstractCegarLoop]: Abstraction has 34589 states and 103651 transitions. [2021-02-19 17:29:00,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:00,347 INFO L276 IsEmpty]: Start isEmpty. Operand 34589 states and 103651 transitions. [2021-02-19 17:29:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:00,377 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:00,377 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:00,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21807,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:00,578 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:00,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:00,578 INFO L82 PathProgramCache]: Analyzing trace with hash -2075824345, now seen corresponding path program 415 times [2021-02-19 17:29:00,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:00,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161291080] [2021-02-19 17:29:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:00,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161291080] [2021-02-19 17:29:00,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119953058] [2021-02-19 17:29:00,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:00,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:00,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:00,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:00,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:29:00,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428349592] [2021-02-19 17:29:00,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:29:00,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:00,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:29:00,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:29:00,728 INFO L87 Difference]: Start difference. First operand 34589 states and 103651 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:01,026 INFO L93 Difference]: Finished difference Result 35134 states and 104438 transitions. [2021-02-19 17:29:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:29:01,026 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:01,078 INFO L225 Difference]: With dead ends: 35134 [2021-02-19 17:29:01,079 INFO L226 Difference]: Without dead ends: 35130 [2021-02-19 17:29:01,079 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:29:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35130 states. [2021-02-19 17:29:01,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35130 to 34574. [2021-02-19 17:29:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34574 states, 34573 states have (on average 2.9964133861683973) internal successors, (103595), 34573 states have internal predecessors, (103595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34574 states to 34574 states and 103595 transitions. [2021-02-19 17:29:01,830 INFO L78 Accepts]: Start accepts. Automaton has 34574 states and 103595 transitions. Word has length 25 [2021-02-19 17:29:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:01,830 INFO L480 AbstractCegarLoop]: Abstraction has 34574 states and 103595 transitions. [2021-02-19 17:29:01,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 34574 states and 103595 transitions. [2021-02-19 17:29:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:01,860 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:01,860 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:02,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21808 [2021-02-19 17:29:02,060 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:02,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1275131638, now seen corresponding path program 416 times [2021-02-19 17:29:02,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:02,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444275891] [2021-02-19 17:29:02,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 30 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:02,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444275891] [2021-02-19 17:29:02,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515598892] [2021-02-19 17:29:02,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:02,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:29:02,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:02,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:02,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:02,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:02,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:29:02,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604743628] [2021-02-19 17:29:02,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:29:02,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:02,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:29:02,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:29:02,215 INFO L87 Difference]: Start difference. First operand 34574 states and 103595 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:02,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:02,568 INFO L93 Difference]: Finished difference Result 34906 states and 104107 transitions. [2021-02-19 17:29:02,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:29:02,569 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:02,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:02,617 INFO L225 Difference]: With dead ends: 34906 [2021-02-19 17:29:02,617 INFO L226 Difference]: Without dead ends: 34903 [2021-02-19 17:29:02,617 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:29:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34903 states. [2021-02-19 17:29:03,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34903 to 34552. [2021-02-19 17:29:03,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34552 states, 34551 states have (on average 2.9960348470377123) internal successors, (103516), 34551 states have internal predecessors, (103516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34552 states to 34552 states and 103516 transitions. [2021-02-19 17:29:03,349 INFO L78 Accepts]: Start accepts. Automaton has 34552 states and 103516 transitions. Word has length 25 [2021-02-19 17:29:03,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:03,349 INFO L480 AbstractCegarLoop]: Abstraction has 34552 states and 103516 transitions. [2021-02-19 17:29:03,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 34552 states and 103516 transitions. [2021-02-19 17:29:03,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:03,379 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:03,379 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:03,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21809,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:03,579 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:03,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:03,579 INFO L82 PathProgramCache]: Analyzing trace with hash -358075285, now seen corresponding path program 417 times [2021-02-19 17:29:03,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:03,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711995708] [2021-02-19 17:29:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:03,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711995708] [2021-02-19 17:29:03,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872387740] [2021-02-19 17:29:03,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:03,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:29:03,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:03,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:03,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:03,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:03,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:29:03,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24738951] [2021-02-19 17:29:03,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:29:03,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:03,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:29:03,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:29:03,738 INFO L87 Difference]: Start difference. First operand 34552 states and 103516 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:03,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:03,928 INFO L93 Difference]: Finished difference Result 36246 states and 107578 transitions. [2021-02-19 17:29:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:29:03,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:03,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:03,982 INFO L225 Difference]: With dead ends: 36246 [2021-02-19 17:29:03,983 INFO L226 Difference]: Without dead ends: 36246 [2021-02-19 17:29:03,983 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=118, Invalid=154, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:04,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36246 states. [2021-02-19 17:29:04,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36246 to 34564. [2021-02-19 17:29:04,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34564 states, 34563 states have (on average 2.9956890316234124) internal successors, (103540), 34563 states have internal predecessors, (103540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34564 states to 34564 states and 103540 transitions. [2021-02-19 17:29:04,767 INFO L78 Accepts]: Start accepts. Automaton has 34564 states and 103540 transitions. Word has length 25 [2021-02-19 17:29:04,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:04,767 INFO L480 AbstractCegarLoop]: Abstraction has 34564 states and 103540 transitions. [2021-02-19 17:29:04,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:04,767 INFO L276 IsEmpty]: Start isEmpty. Operand 34564 states and 103540 transitions. [2021-02-19 17:29:04,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:04,798 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:04,798 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:04,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21810 [2021-02-19 17:29:04,999 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:04,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:04,999 INFO L82 PathProgramCache]: Analyzing trace with hash 435481670, now seen corresponding path program 418 times [2021-02-19 17:29:04,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:04,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950461398] [2021-02-19 17:29:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:05,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950461398] [2021-02-19 17:29:05,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276299489] [2021-02-19 17:29:05,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:05,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:29:05,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:05,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:05,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:05,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:05,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:29:05,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668932299] [2021-02-19 17:29:05,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:29:05,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:05,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:29:05,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:29:05,201 INFO L87 Difference]: Start difference. First operand 34564 states and 103540 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:05,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:05,577 INFO L93 Difference]: Finished difference Result 34890 states and 104049 transitions. [2021-02-19 17:29:05,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:29:05,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:05,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:05,634 INFO L225 Difference]: With dead ends: 34890 [2021-02-19 17:29:05,634 INFO L226 Difference]: Without dead ends: 34887 [2021-02-19 17:29:05,634 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:29:05,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34887 states. [2021-02-19 17:29:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34887 to 34554. [2021-02-19 17:29:06,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34554 states, 34553 states have (on average 2.995600960842763) internal successors, (103507), 34553 states have internal predecessors, (103507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34554 states to 34554 states and 103507 transitions. [2021-02-19 17:29:06,448 INFO L78 Accepts]: Start accepts. Automaton has 34554 states and 103507 transitions. Word has length 25 [2021-02-19 17:29:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:06,448 INFO L480 AbstractCegarLoop]: Abstraction has 34554 states and 103507 transitions. [2021-02-19 17:29:06,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:06,448 INFO L276 IsEmpty]: Start isEmpty. Operand 34554 states and 103507 transitions. [2021-02-19 17:29:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:06,478 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:06,478 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:06,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21811,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:06,678 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:06,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:06,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2087122619, now seen corresponding path program 419 times [2021-02-19 17:29:06,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:06,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796265015] [2021-02-19 17:29:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:06,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796265015] [2021-02-19 17:29:06,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563197059] [2021-02-19 17:29:06,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:06,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:29:06,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:06,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:06,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:06,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:06,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:29:06,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237087289] [2021-02-19 17:29:06,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:29:06,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:06,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:29:06,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:29:06,853 INFO L87 Difference]: Start difference. First operand 34554 states and 103507 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:07,049 INFO L93 Difference]: Finished difference Result 35086 states and 104209 transitions. [2021-02-19 17:29:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:29:07,049 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:07,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:07,104 INFO L225 Difference]: With dead ends: 35086 [2021-02-19 17:29:07,104 INFO L226 Difference]: Without dead ends: 35086 [2021-02-19 17:29:07,104 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:29:07,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35086 states. [2021-02-19 17:29:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35086 to 34511. [2021-02-19 17:29:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34511 states, 34510 states have (on average 2.9948710518690236) internal successors, (103353), 34510 states have internal predecessors, (103353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34511 states to 34511 states and 103353 transitions. [2021-02-19 17:29:07,844 INFO L78 Accepts]: Start accepts. Automaton has 34511 states and 103353 transitions. Word has length 25 [2021-02-19 17:29:07,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:07,844 INFO L480 AbstractCegarLoop]: Abstraction has 34511 states and 103353 transitions. [2021-02-19 17:29:07,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 34511 states and 103353 transitions. [2021-02-19 17:29:07,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:07,873 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:07,873 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:08,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21812 [2021-02-19 17:29:08,073 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:08,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:08,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1924886666, now seen corresponding path program 420 times [2021-02-19 17:29:08,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:08,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738116747] [2021-02-19 17:29:08,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:08,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738116747] [2021-02-19 17:29:08,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703541716] [2021-02-19 17:29:08,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:08,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:29:08,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:08,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:08,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:08,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:08,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:29:08,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963033187] [2021-02-19 17:29:08,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:29:08,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:08,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:29:08,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:08,249 INFO L87 Difference]: Start difference. First operand 34511 states and 103353 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:08,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:08,588 INFO L93 Difference]: Finished difference Result 34839 states and 103865 transitions. [2021-02-19 17:29:08,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:29:08,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:08,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:08,639 INFO L225 Difference]: With dead ends: 34839 [2021-02-19 17:29:08,640 INFO L226 Difference]: Without dead ends: 34836 [2021-02-19 17:29:08,640 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=301, Invalid=569, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:29:08,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34836 states. [2021-02-19 17:29:09,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34836 to 34511. [2021-02-19 17:29:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34511 states, 34510 states have (on average 2.9948130976528544) internal successors, (103351), 34510 states have internal predecessors, (103351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34511 states to 34511 states and 103351 transitions. [2021-02-19 17:29:09,413 INFO L78 Accepts]: Start accepts. Automaton has 34511 states and 103351 transitions. Word has length 25 [2021-02-19 17:29:09,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:09,413 INFO L480 AbstractCegarLoop]: Abstraction has 34511 states and 103351 transitions. [2021-02-19 17:29:09,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:09,413 INFO L276 IsEmpty]: Start isEmpty. Operand 34511 states and 103351 transitions. [2021-02-19 17:29:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:09,442 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:09,442 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:09,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21813,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:09,642 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:09,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:09,642 INFO L82 PathProgramCache]: Analyzing trace with hash 146984875, now seen corresponding path program 421 times [2021-02-19 17:29:09,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:09,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891739981] [2021-02-19 17:29:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:09,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891739981] [2021-02-19 17:29:09,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483848457] [2021-02-19 17:29:09,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:09,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:09,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:09,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:09,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:29:09,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980741409] [2021-02-19 17:29:09,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:29:09,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:09,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:29:09,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:09,819 INFO L87 Difference]: Start difference. First operand 34511 states and 103351 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:10,046 INFO L93 Difference]: Finished difference Result 37456 states and 110986 transitions. [2021-02-19 17:29:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:29:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:10,099 INFO L225 Difference]: With dead ends: 37456 [2021-02-19 17:29:10,099 INFO L226 Difference]: Without dead ends: 37456 [2021-02-19 17:29:10,099 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:29:10,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37456 states. [2021-02-19 17:29:10,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37456 to 34426. [2021-02-19 17:29:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34426 states, 34425 states have (on average 2.9926216412490922) internal successors, (103021), 34425 states have internal predecessors, (103021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34426 states to 34426 states and 103021 transitions. [2021-02-19 17:29:10,902 INFO L78 Accepts]: Start accepts. Automaton has 34426 states and 103021 transitions. Word has length 25 [2021-02-19 17:29:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:10,902 INFO L480 AbstractCegarLoop]: Abstraction has 34426 states and 103021 transitions. [2021-02-19 17:29:10,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:10,902 INFO L276 IsEmpty]: Start isEmpty. Operand 34426 states and 103021 transitions. [2021-02-19 17:29:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:10,932 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:10,932 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:11,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21814 [2021-02-19 17:29:11,133 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:11,133 INFO L82 PathProgramCache]: Analyzing trace with hash 851801286, now seen corresponding path program 422 times [2021-02-19 17:29:11,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:11,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838542516] [2021-02-19 17:29:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:11,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838542516] [2021-02-19 17:29:11,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584658921] [2021-02-19 17:29:11,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:11,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:29:11,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:11,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:11,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 38 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:11,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:11,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:29:11,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46265] [2021-02-19 17:29:11,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:29:11,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:11,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:29:11,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:11,320 INFO L87 Difference]: Start difference. First operand 34426 states and 103021 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:11,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:11,706 INFO L93 Difference]: Finished difference Result 35113 states and 104565 transitions. [2021-02-19 17:29:11,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:29:11,707 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:11,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:11,758 INFO L225 Difference]: With dead ends: 35113 [2021-02-19 17:29:11,758 INFO L226 Difference]: Without dead ends: 35109 [2021-02-19 17:29:11,758 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=618, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:29:11,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35109 states. [2021-02-19 17:29:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35109 to 34440. [2021-02-19 17:29:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34440 states, 34439 states have (on average 2.9925665669734896) internal successors, (103061), 34439 states have internal predecessors, (103061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:12,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34440 states to 34440 states and 103061 transitions. [2021-02-19 17:29:12,302 INFO L78 Accepts]: Start accepts. Automaton has 34440 states and 103061 transitions. Word has length 25 [2021-02-19 17:29:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:12,302 INFO L480 AbstractCegarLoop]: Abstraction has 34440 states and 103061 transitions. [2021-02-19 17:29:12,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:12,302 INFO L276 IsEmpty]: Start isEmpty. Operand 34440 states and 103061 transitions. [2021-02-19 17:29:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:12,535 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:12,535 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:12,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21815,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:12,736 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:12,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:12,736 INFO L82 PathProgramCache]: Analyzing trace with hash 684840453, now seen corresponding path program 423 times [2021-02-19 17:29:12,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:12,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233416378] [2021-02-19 17:29:12,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:12,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233416378] [2021-02-19 17:29:12,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001876472] [2021-02-19 17:29:12,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:12,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:29:12,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:12,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:12,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:12,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:12,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:29:12,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457010988] [2021-02-19 17:29:12,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:29:12,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:12,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:29:12,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:12,921 INFO L87 Difference]: Start difference. First operand 34440 states and 103061 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:13,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:13,246 INFO L93 Difference]: Finished difference Result 49901 states and 148403 transitions. [2021-02-19 17:29:13,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:29:13,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:13,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:13,324 INFO L225 Difference]: With dead ends: 49901 [2021-02-19 17:29:13,324 INFO L226 Difference]: Without dead ends: 49901 [2021-02-19 17:29:13,325 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:29:13,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49901 states. [2021-02-19 17:29:14,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49901 to 43769. [2021-02-19 17:29:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43769 states, 43768 states have (on average 3.0073569731310545) internal successors, (131626), 43768 states have internal predecessors, (131626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43769 states to 43769 states and 131626 transitions. [2021-02-19 17:29:14,192 INFO L78 Accepts]: Start accepts. Automaton has 43769 states and 131626 transitions. Word has length 25 [2021-02-19 17:29:14,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:14,192 INFO L480 AbstractCegarLoop]: Abstraction has 43769 states and 131626 transitions. [2021-02-19 17:29:14,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:14,192 INFO L276 IsEmpty]: Start isEmpty. Operand 43769 states and 131626 transitions. [2021-02-19 17:29:14,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:14,225 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:14,225 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:14,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21816,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:14,426 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:14,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:14,426 INFO L82 PathProgramCache]: Analyzing trace with hash -905044172, now seen corresponding path program 424 times [2021-02-19 17:29:14,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:14,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178311428] [2021-02-19 17:29:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:14,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178311428] [2021-02-19 17:29:14,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141780491] [2021-02-19 17:29:14,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:14,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:29:14,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:14,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:14,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:14,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:14,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:29:14,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701521007] [2021-02-19 17:29:14,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:29:14,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:14,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:29:14,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:14,595 INFO L87 Difference]: Start difference. First operand 43769 states and 131626 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:14,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:14,925 INFO L93 Difference]: Finished difference Result 44043 states and 132086 transitions. [2021-02-19 17:29:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:29:14,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:14,986 INFO L225 Difference]: With dead ends: 44043 [2021-02-19 17:29:14,986 INFO L226 Difference]: Without dead ends: 44039 [2021-02-19 17:29:14,986 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:29:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44039 states. [2021-02-19 17:29:15,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44039 to 43769. [2021-02-19 17:29:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43769 states, 43768 states have (on average 3.0073112776457687) internal successors, (131624), 43768 states have internal predecessors, (131624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:15,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43769 states to 43769 states and 131624 transitions. [2021-02-19 17:29:15,751 INFO L78 Accepts]: Start accepts. Automaton has 43769 states and 131624 transitions. Word has length 25 [2021-02-19 17:29:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:15,751 INFO L480 AbstractCegarLoop]: Abstraction has 43769 states and 131624 transitions. [2021-02-19 17:29:15,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 43769 states and 131624 transitions. [2021-02-19 17:29:15,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:15,785 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:15,785 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:15,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21817,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:15,986 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:15,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:15,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1072005005, now seen corresponding path program 425 times [2021-02-19 17:29:15,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:15,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745762505] [2021-02-19 17:29:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:16,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745762505] [2021-02-19 17:29:16,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126820747] [2021-02-19 17:29:16,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:16,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:29:16,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:16,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:16,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:16,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:16,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:29:16,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035986501] [2021-02-19 17:29:16,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:29:16,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:16,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:29:16,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:16,155 INFO L87 Difference]: Start difference. First operand 43769 states and 131624 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:16,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:16,454 INFO L93 Difference]: Finished difference Result 50291 states and 149787 transitions. [2021-02-19 17:29:16,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:29:16,454 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:16,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:16,532 INFO L225 Difference]: With dead ends: 50291 [2021-02-19 17:29:16,532 INFO L226 Difference]: Without dead ends: 50291 [2021-02-19 17:29:16,532 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:29:16,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50291 states. [2021-02-19 17:29:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50291 to 34445. [2021-02-19 17:29:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34445 states, 34444 states have (on average 2.994019277668099) internal successors, (103126), 34444 states have internal predecessors, (103126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:17,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34445 states to 34445 states and 103126 transitions. [2021-02-19 17:29:17,370 INFO L78 Accepts]: Start accepts. Automaton has 34445 states and 103126 transitions. Word has length 25 [2021-02-19 17:29:17,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:17,370 INFO L480 AbstractCegarLoop]: Abstraction has 34445 states and 103126 transitions. [2021-02-19 17:29:17,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:17,370 INFO L276 IsEmpty]: Start isEmpty. Operand 34445 states and 103126 transitions. [2021-02-19 17:29:17,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:17,398 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:17,398 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:17,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21818,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:17,599 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:17,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:17,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1000670448, now seen corresponding path program 426 times [2021-02-19 17:29:17,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:17,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680195539] [2021-02-19 17:29:17,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:17,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680195539] [2021-02-19 17:29:17,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137924754] [2021-02-19 17:29:17,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:17,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 17:29:17,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:17,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:17,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:17,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:17,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:29:17,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932783700] [2021-02-19 17:29:17,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:29:17,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:17,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:29:17,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:29:17,758 INFO L87 Difference]: Start difference. First operand 34445 states and 103126 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:17,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:17,975 INFO L93 Difference]: Finished difference Result 35135 states and 104423 transitions. [2021-02-19 17:29:17,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:29:17,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:17,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:18,023 INFO L225 Difference]: With dead ends: 35135 [2021-02-19 17:29:18,023 INFO L226 Difference]: Without dead ends: 35135 [2021-02-19 17:29:18,023 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:29:18,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35135 states. [2021-02-19 17:29:18,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35135 to 34473. [2021-02-19 17:29:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34473 states, 34472 states have (on average 2.994140171733581) internal successors, (103214), 34472 states have internal predecessors, (103214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34473 states to 34473 states and 103214 transitions. [2021-02-19 17:29:18,712 INFO L78 Accepts]: Start accepts. Automaton has 34473 states and 103214 transitions. Word has length 25 [2021-02-19 17:29:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:18,712 INFO L480 AbstractCegarLoop]: Abstraction has 34473 states and 103214 transitions. [2021-02-19 17:29:18,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:18,712 INFO L276 IsEmpty]: Start isEmpty. Operand 34473 states and 103214 transitions. [2021-02-19 17:29:18,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:18,741 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:18,741 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:18,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21819,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:18,942 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:18,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:18,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1945432431, now seen corresponding path program 427 times [2021-02-19 17:29:18,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:18,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376065464] [2021-02-19 17:29:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:19,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376065464] [2021-02-19 17:29:19,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540974305] [2021-02-19 17:29:19,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:19,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 45 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:19,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:19,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:29:19,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024729456] [2021-02-19 17:29:19,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:29:19,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:19,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:29:19,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:29:19,088 INFO L87 Difference]: Start difference. First operand 34473 states and 103214 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:19,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:19,372 INFO L93 Difference]: Finished difference Result 34990 states and 103957 transitions. [2021-02-19 17:29:19,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:29:19,373 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:19,418 INFO L225 Difference]: With dead ends: 34990 [2021-02-19 17:29:19,418 INFO L226 Difference]: Without dead ends: 34986 [2021-02-19 17:29:19,418 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:29:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34986 states. [2021-02-19 17:29:19,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34986 to 34487. [2021-02-19 17:29:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34487 states, 34486 states have (on average 2.9941135533259873) internal successors, (103255), 34486 states have internal predecessors, (103255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34487 states to 34487 states and 103255 transitions. [2021-02-19 17:29:20,026 INFO L78 Accepts]: Start accepts. Automaton has 34487 states and 103255 transitions. Word has length 25 [2021-02-19 17:29:20,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:20,026 INFO L480 AbstractCegarLoop]: Abstraction has 34487 states and 103255 transitions. [2021-02-19 17:29:20,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 34487 states and 103255 transitions. [2021-02-19 17:29:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:20,054 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:20,054 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:20,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21820 [2021-02-19 17:29:20,254 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:20,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1548842158, now seen corresponding path program 428 times [2021-02-19 17:29:20,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:20,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159290509] [2021-02-19 17:29:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:20,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159290509] [2021-02-19 17:29:20,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439063467] [2021-02-19 17:29:20,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:20,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:29:20,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:20,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:20,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:20,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:20,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:29:20,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194847588] [2021-02-19 17:29:20,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:29:20,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:20,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:29:20,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:29:20,405 INFO L87 Difference]: Start difference. First operand 34487 states and 103255 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:20,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:20,707 INFO L93 Difference]: Finished difference Result 34849 states and 103803 transitions. [2021-02-19 17:29:20,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:29:20,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:20,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:20,753 INFO L225 Difference]: With dead ends: 34849 [2021-02-19 17:29:20,754 INFO L226 Difference]: Without dead ends: 34846 [2021-02-19 17:29:20,754 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:29:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34846 states. [2021-02-19 17:29:21,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34846 to 34458. [2021-02-19 17:29:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34458 states, 34457 states have (on average 2.993615230577241) internal successors, (103151), 34457 states have internal predecessors, (103151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34458 states to 34458 states and 103151 transitions. [2021-02-19 17:29:21,357 INFO L78 Accepts]: Start accepts. Automaton has 34458 states and 103151 transitions. Word has length 25 [2021-02-19 17:29:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:21,357 INFO L480 AbstractCegarLoop]: Abstraction has 34458 states and 103151 transitions. [2021-02-19 17:29:21,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 34458 states and 103151 transitions. [2021-02-19 17:29:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:21,387 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:21,387 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:21,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21821 [2021-02-19 17:29:21,588 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:21,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:21,588 INFO L82 PathProgramCache]: Analyzing trace with hash -631785805, now seen corresponding path program 429 times [2021-02-19 17:29:21,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:21,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39003883] [2021-02-19 17:29:21,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:21,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39003883] [2021-02-19 17:29:21,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65075196] [2021-02-19 17:29:21,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:21,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:29:21,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:21,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:21,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:21,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:21,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:29:21,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455062341] [2021-02-19 17:29:21,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:29:21,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:21,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:29:21,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:29:21,744 INFO L87 Difference]: Start difference. First operand 34458 states and 103151 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:21,925 INFO L93 Difference]: Finished difference Result 37029 states and 109792 transitions. [2021-02-19 17:29:21,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:29:21,926 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:21,975 INFO L225 Difference]: With dead ends: 37029 [2021-02-19 17:29:21,975 INFO L226 Difference]: Without dead ends: 37029 [2021-02-19 17:29:21,975 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=131, Invalid=175, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:29:21,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37029 states. [2021-02-19 17:29:22,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37029 to 34480. [2021-02-19 17:29:22,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34480 states, 34479 states have (on average 2.9933872792134344) internal successors, (103209), 34479 states have internal predecessors, (103209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34480 states to 34480 states and 103209 transitions. [2021-02-19 17:29:22,625 INFO L78 Accepts]: Start accepts. Automaton has 34480 states and 103209 transitions. Word has length 25 [2021-02-19 17:29:22,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:22,626 INFO L480 AbstractCegarLoop]: Abstraction has 34480 states and 103209 transitions. [2021-02-19 17:29:22,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand 34480 states and 103209 transitions. [2021-02-19 17:29:22,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:22,655 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:22,655 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:22,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21822 [2021-02-19 17:29:22,855 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:22,855 INFO L82 PathProgramCache]: Analyzing trace with hash 161771150, now seen corresponding path program 430 times [2021-02-19 17:29:22,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:22,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949698482] [2021-02-19 17:29:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 26 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:22,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949698482] [2021-02-19 17:29:22,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108989871] [2021-02-19 17:29:22,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:22,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:29:22,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:22,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:22,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:23,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:23,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:29:23,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241863332] [2021-02-19 17:29:23,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:29:23,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:23,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:29:23,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:29:23,012 INFO L87 Difference]: Start difference. First operand 34480 states and 103209 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:23,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:23,358 INFO L93 Difference]: Finished difference Result 34836 states and 103750 transitions. [2021-02-19 17:29:23,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:29:23,359 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:23,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:23,405 INFO L225 Difference]: With dead ends: 34836 [2021-02-19 17:29:23,405 INFO L226 Difference]: Without dead ends: 34831 [2021-02-19 17:29:23,405 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:29:23,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34831 states. [2021-02-19 17:29:23,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34831 to 34462. [2021-02-19 17:29:23,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34462 states, 34461 states have (on average 2.9931806970198194) internal successors, (103148), 34461 states have internal predecessors, (103148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34462 states to 34462 states and 103148 transitions. [2021-02-19 17:29:24,015 INFO L78 Accepts]: Start accepts. Automaton has 34462 states and 103148 transitions. Word has length 25 [2021-02-19 17:29:24,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:24,015 INFO L480 AbstractCegarLoop]: Abstraction has 34462 states and 103148 transitions. [2021-02-19 17:29:24,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:24,015 INFO L276 IsEmpty]: Start isEmpty. Operand 34462 states and 103148 transitions. [2021-02-19 17:29:24,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:24,044 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:24,044 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:24,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21823,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:24,244 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:24,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:24,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1934134157, now seen corresponding path program 431 times [2021-02-19 17:29:24,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:24,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009146252] [2021-02-19 17:29:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:24,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009146252] [2021-02-19 17:29:24,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734856455] [2021-02-19 17:29:24,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:24,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:29:24,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:24,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:24,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:24,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:24,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:29:24,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245586100] [2021-02-19 17:29:24,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:29:24,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:24,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:29:24,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:29:24,405 INFO L87 Difference]: Start difference. First operand 34462 states and 103148 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:24,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:24,605 INFO L93 Difference]: Finished difference Result 37443 states and 111018 transitions. [2021-02-19 17:29:24,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:29:24,605 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:24,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:24,655 INFO L225 Difference]: With dead ends: 37443 [2021-02-19 17:29:24,655 INFO L226 Difference]: Without dead ends: 37443 [2021-02-19 17:29:24,655 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:29:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37443 states. [2021-02-19 17:29:25,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37443 to 34466. [2021-02-19 17:29:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34466 states, 34465 states have (on average 2.992920353982301) internal successors, (103151), 34465 states have internal predecessors, (103151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:25,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34466 states to 34466 states and 103151 transitions. [2021-02-19 17:29:25,258 INFO L78 Accepts]: Start accepts. Automaton has 34466 states and 103151 transitions. Word has length 25 [2021-02-19 17:29:25,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:25,258 INFO L480 AbstractCegarLoop]: Abstraction has 34466 states and 103151 transitions. [2021-02-19 17:29:25,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:25,258 INFO L276 IsEmpty]: Start isEmpty. Operand 34466 states and 103151 transitions. [2021-02-19 17:29:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:25,287 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:25,287 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:25,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21824,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:25,487 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:25,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:25,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1651176146, now seen corresponding path program 432 times [2021-02-19 17:29:25,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:25,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81034383] [2021-02-19 17:29:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:25,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81034383] [2021-02-19 17:29:25,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409333191] [2021-02-19 17:29:25,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:25,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 17:29:25,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:25,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:25,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 30 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:25,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:25,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:29:25,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475746526] [2021-02-19 17:29:25,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:29:25,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:25,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:29:25,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:29:25,653 INFO L87 Difference]: Start difference. First operand 34466 states and 103151 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:25,937 INFO L93 Difference]: Finished difference Result 35984 states and 106853 transitions. [2021-02-19 17:29:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:29:25,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:25,992 INFO L225 Difference]: With dead ends: 35984 [2021-02-19 17:29:25,992 INFO L226 Difference]: Without dead ends: 35981 [2021-02-19 17:29:25,992 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:29:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35981 states. [2021-02-19 17:29:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35981 to 34486. [2021-02-19 17:29:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34486 states, 34485 states have (on average 2.9928374655647385) internal successors, (103208), 34485 states have internal predecessors, (103208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34486 states to 34486 states and 103208 transitions. [2021-02-19 17:29:26,591 INFO L78 Accepts]: Start accepts. Automaton has 34486 states and 103208 transitions. Word has length 25 [2021-02-19 17:29:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:26,591 INFO L480 AbstractCegarLoop]: Abstraction has 34486 states and 103208 transitions. [2021-02-19 17:29:26,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 34486 states and 103208 transitions. [2021-02-19 17:29:26,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:26,619 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:26,620 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:26,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21825,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:26,820 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:26,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:26,820 INFO L82 PathProgramCache]: Analyzing trace with hash -126725645, now seen corresponding path program 433 times [2021-02-19 17:29:26,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:26,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909120273] [2021-02-19 17:29:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:26,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909120273] [2021-02-19 17:29:26,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072218961] [2021-02-19 17:29:26,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:26,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:26,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:26,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:26,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:29:26,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057352091] [2021-02-19 17:29:26,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:29:26,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:26,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:29:26,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:29:26,981 INFO L87 Difference]: Start difference. First operand 34486 states and 103208 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:27,231 INFO L93 Difference]: Finished difference Result 55625 states and 167165 transitions. [2021-02-19 17:29:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:29:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:27,320 INFO L225 Difference]: With dead ends: 55625 [2021-02-19 17:29:27,320 INFO L226 Difference]: Without dead ends: 55625 [2021-02-19 17:29:27,320 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:29:27,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55625 states. [2021-02-19 17:29:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55625 to 54853. [2021-02-19 17:29:28,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54853 states, 54852 states have (on average 3.027565084226646) internal successors, (166068), 54852 states have internal predecessors, (166068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:28,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54853 states to 54853 states and 166068 transitions. [2021-02-19 17:29:28,410 INFO L78 Accepts]: Start accepts. Automaton has 54853 states and 166068 transitions. Word has length 25 [2021-02-19 17:29:28,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:28,410 INFO L480 AbstractCegarLoop]: Abstraction has 54853 states and 166068 transitions. [2021-02-19 17:29:28,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:28,410 INFO L276 IsEmpty]: Start isEmpty. Operand 54853 states and 166068 transitions. [2021-02-19 17:29:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:28,448 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:28,448 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:28,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21826,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:28,648 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:28,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:28,649 INFO L82 PathProgramCache]: Analyzing trace with hash 578090766, now seen corresponding path program 434 times [2021-02-19 17:29:28,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:28,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628999463] [2021-02-19 17:29:28,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:28,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628999463] [2021-02-19 17:29:28,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322351922] [2021-02-19 17:29:28,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:28,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:29:28,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:28,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:28,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:28,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:28,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:29:28,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878416390] [2021-02-19 17:29:28,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:29:28,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:28,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:29:28,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:28,816 INFO L87 Difference]: Start difference. First operand 54853 states and 166068 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:29,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:29,477 INFO L93 Difference]: Finished difference Result 56596 states and 170391 transitions. [2021-02-19 17:29:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:29:29,477 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:29,565 INFO L225 Difference]: With dead ends: 56596 [2021-02-19 17:29:29,565 INFO L226 Difference]: Without dead ends: 56592 [2021-02-19 17:29:29,565 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:29:29,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56592 states. [2021-02-19 17:29:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56592 to 54867. [2021-02-19 17:29:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54867 states, 54866 states have (on average 3.0276309554186565) internal successors, (166114), 54866 states have internal predecessors, (166114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54867 states to 54867 states and 166114 transitions. [2021-02-19 17:29:30,586 INFO L78 Accepts]: Start accepts. Automaton has 54867 states and 166114 transitions. Word has length 25 [2021-02-19 17:29:30,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:30,586 INFO L480 AbstractCegarLoop]: Abstraction has 54867 states and 166114 transitions. [2021-02-19 17:29:30,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:30,586 INFO L276 IsEmpty]: Start isEmpty. Operand 54867 states and 166114 transitions. [2021-02-19 17:29:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:30,630 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:30,630 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:30,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21827,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:30,830 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:30,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:30,830 INFO L82 PathProgramCache]: Analyzing trace with hash 411129933, now seen corresponding path program 435 times [2021-02-19 17:29:30,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:30,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602907017] [2021-02-19 17:29:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:30,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602907017] [2021-02-19 17:29:30,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469585504] [2021-02-19 17:29:30,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:30,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:29:30,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:30,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:30,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:31,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:31,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:29:31,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188246375] [2021-02-19 17:29:31,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:29:31,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:31,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:29:31,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:31,003 INFO L87 Difference]: Start difference. First operand 54867 states and 166114 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:31,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:31,317 INFO L93 Difference]: Finished difference Result 57632 states and 172956 transitions. [2021-02-19 17:29:31,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:29:31,318 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:31,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:31,411 INFO L225 Difference]: With dead ends: 57632 [2021-02-19 17:29:31,411 INFO L226 Difference]: Without dead ends: 57632 [2021-02-19 17:29:31,411 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=201, Invalid=351, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:29:31,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57632 states. [2021-02-19 17:29:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57632 to 54732. [2021-02-19 17:29:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54732 states, 54731 states have (on average 3.0268220935119037) internal successors, (165661), 54731 states have internal predecessors, (165661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:32,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54732 states to 54732 states and 165661 transitions. [2021-02-19 17:29:32,424 INFO L78 Accepts]: Start accepts. Automaton has 54732 states and 165661 transitions. Word has length 25 [2021-02-19 17:29:32,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:32,424 INFO L480 AbstractCegarLoop]: Abstraction has 54732 states and 165661 transitions. [2021-02-19 17:29:32,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:32,424 INFO L276 IsEmpty]: Start isEmpty. Operand 54732 states and 165661 transitions. [2021-02-19 17:29:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:32,460 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:32,460 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:32,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21828,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:32,661 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:32,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:32,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1672182354, now seen corresponding path program 436 times [2021-02-19 17:29:32,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:32,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024538132] [2021-02-19 17:29:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:32,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024538132] [2021-02-19 17:29:32,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387909318] [2021-02-19 17:29:32,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:32,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:29:32,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:32,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:32,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:32,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:32,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:29:32,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248059299] [2021-02-19 17:29:32,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:29:32,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:32,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:29:32,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:32,838 INFO L87 Difference]: Start difference. First operand 54732 states and 165661 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:33,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:33,249 INFO L93 Difference]: Finished difference Result 55590 states and 167652 transitions. [2021-02-19 17:29:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:29:33,250 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:33,336 INFO L225 Difference]: With dead ends: 55590 [2021-02-19 17:29:33,336 INFO L226 Difference]: Without dead ends: 55585 [2021-02-19 17:29:33,336 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=665, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:29:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55585 states. [2021-02-19 17:29:34,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55585 to 54734. [2021-02-19 17:29:34,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54734 states, 54733 states have (on average 3.026784572378638) internal successors, (165665), 54733 states have internal predecessors, (165665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54734 states to 54734 states and 165665 transitions. [2021-02-19 17:29:34,349 INFO L78 Accepts]: Start accepts. Automaton has 54734 states and 165665 transitions. Word has length 25 [2021-02-19 17:29:34,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:34,349 INFO L480 AbstractCegarLoop]: Abstraction has 54734 states and 165665 transitions. [2021-02-19 17:29:34,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:34,349 INFO L276 IsEmpty]: Start isEmpty. Operand 54734 states and 165665 transitions. [2021-02-19 17:29:34,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:34,386 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:34,386 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:34,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21829,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:34,587 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:34,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:34,587 INFO L82 PathProgramCache]: Analyzing trace with hash -95216333, now seen corresponding path program 437 times [2021-02-19 17:29:34,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:34,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513613030] [2021-02-19 17:29:34,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:34,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513613030] [2021-02-19 17:29:34,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450501542] [2021-02-19 17:29:34,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:34,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:29:34,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:34,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:34,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:34,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:34,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:29:34,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395598445] [2021-02-19 17:29:34,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:29:34,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:34,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:29:34,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:34,765 INFO L87 Difference]: Start difference. First operand 54734 states and 165665 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:35,459 INFO L93 Difference]: Finished difference Result 84545 states and 256279 transitions. [2021-02-19 17:29:35,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:29:35,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:35,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:35,601 INFO L225 Difference]: With dead ends: 84545 [2021-02-19 17:29:35,601 INFO L226 Difference]: Without dead ends: 84545 [2021-02-19 17:29:35,601 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:29:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84545 states. [2021-02-19 17:29:36,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84545 to 81326. [2021-02-19 17:29:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81326 states, 81325 states have (on average 3.0506486320319706) internal successors, (248094), 81325 states have internal predecessors, (248094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81326 states to 81326 states and 248094 transitions. [2021-02-19 17:29:37,011 INFO L78 Accepts]: Start accepts. Automaton has 81326 states and 248094 transitions. Word has length 25 [2021-02-19 17:29:37,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:37,011 INFO L480 AbstractCegarLoop]: Abstraction has 81326 states and 248094 transitions. [2021-02-19 17:29:37,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 81326 states and 248094 transitions. [2021-02-19 17:29:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:37,067 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:37,067 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:37,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21830,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:37,267 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:37,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:37,268 INFO L82 PathProgramCache]: Analyzing trace with hash -634958646, now seen corresponding path program 438 times [2021-02-19 17:29:37,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:37,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841302927] [2021-02-19 17:29:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:37,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841302927] [2021-02-19 17:29:37,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138727907] [2021-02-19 17:29:37,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:37,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:29:37,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:37,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:37,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:37,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:37,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:29:37,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305254941] [2021-02-19 17:29:37,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:29:37,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:37,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:29:37,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:29:37,429 INFO L87 Difference]: Start difference. First operand 81326 states and 248094 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:38,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:38,189 INFO L93 Difference]: Finished difference Result 81690 states and 248669 transitions. [2021-02-19 17:29:38,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:29:38,190 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:38,341 INFO L225 Difference]: With dead ends: 81690 [2021-02-19 17:29:38,341 INFO L226 Difference]: Without dead ends: 81683 [2021-02-19 17:29:38,341 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:29:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81683 states. [2021-02-19 17:29:39,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81683 to 81266. [2021-02-19 17:29:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81266 states, 81265 states have (on average 3.0504399187842246) internal successors, (247894), 81265 states have internal predecessors, (247894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81266 states to 81266 states and 247894 transitions. [2021-02-19 17:29:39,820 INFO L78 Accepts]: Start accepts. Automaton has 81266 states and 247894 transitions. Word has length 25 [2021-02-19 17:29:39,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:39,820 INFO L480 AbstractCegarLoop]: Abstraction has 81266 states and 247894 transitions. [2021-02-19 17:29:39,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:39,820 INFO L276 IsEmpty]: Start isEmpty. Operand 81266 states and 247894 transitions. [2021-02-19 17:29:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:39,871 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:39,871 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:40,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21831,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:40,071 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:40,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1882106859, now seen corresponding path program 439 times [2021-02-19 17:29:40,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:40,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529108227] [2021-02-19 17:29:40,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:40,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529108227] [2021-02-19 17:29:40,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430238901] [2021-02-19 17:29:40,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:40,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:40,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:29:40,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:40,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:29:40,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004064410] [2021-02-19 17:29:40,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:29:40,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:40,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:29:40,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:29:40,233 INFO L87 Difference]: Start difference. First operand 81266 states and 247894 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:40,951 INFO L93 Difference]: Finished difference Result 81972 states and 249227 transitions. [2021-02-19 17:29:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:29:40,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:40,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:41,095 INFO L225 Difference]: With dead ends: 81972 [2021-02-19 17:29:41,096 INFO L226 Difference]: Without dead ends: 81972 [2021-02-19 17:29:41,096 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:29:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81972 states. [2021-02-19 17:29:42,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81972 to 81266. [2021-02-19 17:29:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81266 states, 81265 states have (on average 3.0507598597182057) internal successors, (247920), 81265 states have internal predecessors, (247920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81266 states to 81266 states and 247920 transitions. [2021-02-19 17:29:42,561 INFO L78 Accepts]: Start accepts. Automaton has 81266 states and 247920 transitions. Word has length 25 [2021-02-19 17:29:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:42,562 INFO L480 AbstractCegarLoop]: Abstraction has 81266 states and 247920 transitions. [2021-02-19 17:29:42,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 81266 states and 247920 transitions. [2021-02-19 17:29:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:42,612 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:42,612 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:42,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21832 [2021-02-19 17:29:42,812 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:42,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:42,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1708044026, now seen corresponding path program 440 times [2021-02-19 17:29:42,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:42,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449127314] [2021-02-19 17:29:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:42,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449127314] [2021-02-19 17:29:42,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947925385] [2021-02-19 17:29:42,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:42,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:29:42,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:42,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:42,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:42,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:42,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:29:42,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430374889] [2021-02-19 17:29:42,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:29:42,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:42,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:29:42,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:42,979 INFO L87 Difference]: Start difference. First operand 81266 states and 247920 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:43,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:43,456 INFO L93 Difference]: Finished difference Result 81635 states and 248501 transitions. [2021-02-19 17:29:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:29:43,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:44,023 INFO L225 Difference]: With dead ends: 81635 [2021-02-19 17:29:44,023 INFO L226 Difference]: Without dead ends: 81627 [2021-02-19 17:29:44,023 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:29:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81627 states. [2021-02-19 17:29:45,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81627 to 81198. [2021-02-19 17:29:45,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81198 states, 81197 states have (on average 3.0509994211608804) internal successors, (247732), 81197 states have internal predecessors, (247732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:45,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81198 states to 81198 states and 247732 transitions. [2021-02-19 17:29:45,465 INFO L78 Accepts]: Start accepts. Automaton has 81198 states and 247732 transitions. Word has length 25 [2021-02-19 17:29:45,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:45,465 INFO L480 AbstractCegarLoop]: Abstraction has 81198 states and 247732 transitions. [2021-02-19 17:29:45,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:45,465 INFO L276 IsEmpty]: Start isEmpty. Operand 81198 states and 247732 transitions. [2021-02-19 17:29:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:45,519 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:45,519 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:45,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21833,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:45,719 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:45,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1875004859, now seen corresponding path program 441 times [2021-02-19 17:29:45,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:45,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536435267] [2021-02-19 17:29:45,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:45,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536435267] [2021-02-19 17:29:45,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359516997] [2021-02-19 17:29:45,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:45,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:29:45,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:45,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:45,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:45,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:45,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:29:45,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468171101] [2021-02-19 17:29:45,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:29:45,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:45,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:29:45,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:45,892 INFO L87 Difference]: Start difference. First operand 81198 states and 247732 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:46,323 INFO L93 Difference]: Finished difference Result 88446 states and 268354 transitions. [2021-02-19 17:29:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:29:46,324 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:46,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:46,485 INFO L225 Difference]: With dead ends: 88446 [2021-02-19 17:29:46,485 INFO L226 Difference]: Without dead ends: 88446 [2021-02-19 17:29:46,486 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:29:46,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88446 states. [2021-02-19 17:29:48,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88446 to 51771. [2021-02-19 17:29:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51771 states, 51770 states have (on average 3.016264245702144) internal successors, (156152), 51770 states have internal predecessors, (156152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51771 states to 51771 states and 156152 transitions. [2021-02-19 17:29:48,183 INFO L78 Accepts]: Start accepts. Automaton has 51771 states and 156152 transitions. Word has length 25 [2021-02-19 17:29:48,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:48,183 INFO L480 AbstractCegarLoop]: Abstraction has 51771 states and 156152 transitions. [2021-02-19 17:29:48,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand 51771 states and 156152 transitions. [2021-02-19 17:29:48,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:48,219 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:48,219 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:48,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21834,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:48,419 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:48,419 INFO L82 PathProgramCache]: Analyzing trace with hash -613952438, now seen corresponding path program 442 times [2021-02-19 17:29:48,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:48,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634063978] [2021-02-19 17:29:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:48,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634063978] [2021-02-19 17:29:48,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834415057] [2021-02-19 17:29:48,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:48,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:29:48,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:48,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:48,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:48,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:48,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:29:48,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412337203] [2021-02-19 17:29:48,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:29:48,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:48,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:29:48,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:48,602 INFO L87 Difference]: Start difference. First operand 51771 states and 156152 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:49,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:49,000 INFO L93 Difference]: Finished difference Result 52712 states and 158342 transitions. [2021-02-19 17:29:49,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:29:49,001 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:49,093 INFO L225 Difference]: With dead ends: 52712 [2021-02-19 17:29:49,094 INFO L226 Difference]: Without dead ends: 52702 [2021-02-19 17:29:49,094 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:29:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52702 states. [2021-02-19 17:29:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52702 to 51760. [2021-02-19 17:29:49,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51760 states, 51759 states have (on average 3.016441585038351) internal successors, (156128), 51759 states have internal predecessors, (156128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51760 states to 51760 states and 156128 transitions. [2021-02-19 17:29:50,076 INFO L78 Accepts]: Start accepts. Automaton has 51760 states and 156128 transitions. Word has length 25 [2021-02-19 17:29:50,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:50,076 INFO L480 AbstractCegarLoop]: Abstraction has 51760 states and 156128 transitions. [2021-02-19 17:29:50,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 51760 states and 156128 transitions. [2021-02-19 17:29:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:50,114 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:50,114 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:50,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21835,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:50,314 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:50,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:50,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1913616171, now seen corresponding path program 443 times [2021-02-19 17:29:50,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:50,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369861003] [2021-02-19 17:29:50,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:50,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369861003] [2021-02-19 17:29:50,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831860420] [2021-02-19 17:29:50,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:50,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 17:29:50,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:50,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:50,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:50,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:50,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:29:50,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249871503] [2021-02-19 17:29:50,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:29:50,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:50,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:29:50,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:29:50,505 INFO L87 Difference]: Start difference. First operand 51760 states and 156128 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:50,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:50,993 INFO L93 Difference]: Finished difference Result 71933 states and 215596 transitions. [2021-02-19 17:29:50,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:29:50,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:50,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:51,128 INFO L225 Difference]: With dead ends: 71933 [2021-02-19 17:29:51,128 INFO L226 Difference]: Without dead ends: 71933 [2021-02-19 17:29:51,128 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=560, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:29:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71933 states. [2021-02-19 17:29:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71933 to 43373. [2021-02-19 17:29:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43373 states, 43372 states have (on average 3.003135663561745) internal successors, (130252), 43372 states have internal predecessors, (130252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43373 states to 43373 states and 130252 transitions. [2021-02-19 17:29:52,368 INFO L78 Accepts]: Start accepts. Automaton has 43373 states and 130252 transitions. Word has length 25 [2021-02-19 17:29:52,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:52,368 INFO L480 AbstractCegarLoop]: Abstraction has 43373 states and 130252 transitions. [2021-02-19 17:29:52,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 43373 states and 130252 transitions. [2021-02-19 17:29:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:52,403 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:52,403 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:52,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21836 [2021-02-19 17:29:52,604 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:52,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2141566971, now seen corresponding path program 444 times [2021-02-19 17:29:52,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:52,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602813926] [2021-02-19 17:29:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:29:52,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602813926] [2021-02-19 17:29:52,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115983823] [2021-02-19 17:29:52,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:52,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:29:52,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:52,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:52,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:29:52,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:52,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:29:52,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255610080] [2021-02-19 17:29:52,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:29:52,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:52,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:29:52,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:29:52,747 INFO L87 Difference]: Start difference. First operand 43373 states and 130252 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:53,312 INFO L93 Difference]: Finished difference Result 43798 states and 130801 transitions. [2021-02-19 17:29:53,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:29:53,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:53,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:53,372 INFO L225 Difference]: With dead ends: 43798 [2021-02-19 17:29:53,372 INFO L226 Difference]: Without dead ends: 43794 [2021-02-19 17:29:53,372 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:29:53,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43794 states. [2021-02-19 17:29:53,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43794 to 43373. [2021-02-19 17:29:53,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43373 states, 43372 states have (on average 3.0030895508623074) internal successors, (130250), 43372 states have internal predecessors, (130250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43373 states to 43373 states and 130250 transitions. [2021-02-19 17:29:54,029 INFO L78 Accepts]: Start accepts. Automaton has 43373 states and 130250 transitions. Word has length 25 [2021-02-19 17:29:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:54,030 INFO L480 AbstractCegarLoop]: Abstraction has 43373 states and 130250 transitions. [2021-02-19 17:29:54,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:54,030 INFO L276 IsEmpty]: Start isEmpty. Operand 43373 states and 130250 transitions. [2021-02-19 17:29:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:54,337 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:54,337 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:54,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21837,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:54,542 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:54,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:54,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1250419292, now seen corresponding path program 445 times [2021-02-19 17:29:54,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:54,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496292197] [2021-02-19 17:29:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:54,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496292197] [2021-02-19 17:29:54,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196834461] [2021-02-19 17:29:54,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:54,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:54,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:54,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:54,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-02-19 17:29:54,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30957405] [2021-02-19 17:29:54,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:29:54,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:54,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:29:54,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:29:54,723 INFO L87 Difference]: Start difference. First operand 43373 states and 130250 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:55,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:55,087 INFO L93 Difference]: Finished difference Result 43680 states and 130765 transitions. [2021-02-19 17:29:55,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:29:55,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:55,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:55,149 INFO L225 Difference]: With dead ends: 43680 [2021-02-19 17:29:55,150 INFO L226 Difference]: Without dead ends: 43675 [2021-02-19 17:29:55,150 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:29:55,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43675 states. [2021-02-19 17:29:55,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43675 to 43373. [2021-02-19 17:29:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43373 states, 43372 states have (on average 3.00304343816287) internal successors, (130248), 43372 states have internal predecessors, (130248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:56,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43373 states to 43373 states and 130248 transitions. [2021-02-19 17:29:56,056 INFO L78 Accepts]: Start accepts. Automaton has 43373 states and 130248 transitions. Word has length 25 [2021-02-19 17:29:56,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:56,056 INFO L480 AbstractCegarLoop]: Abstraction has 43373 states and 130248 transitions. [2021-02-19 17:29:56,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:56,056 INFO L276 IsEmpty]: Start isEmpty. Operand 43373 states and 130248 transitions. [2021-02-19 17:29:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:56,093 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:56,093 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:56,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21838,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:56,294 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:56,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1277149317, now seen corresponding path program 446 times [2021-02-19 17:29:56,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:56,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972158145] [2021-02-19 17:29:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:56,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972158145] [2021-02-19 17:29:56,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534823754] [2021-02-19 17:29:56,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:56,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:29:56,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:56,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:29:56,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:56,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:56,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-02-19 17:29:56,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635263564] [2021-02-19 17:29:56,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:29:56,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:56,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:29:56,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:29:56,501 INFO L87 Difference]: Start difference. First operand 43373 states and 130248 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:56,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:29:56,844 INFO L93 Difference]: Finished difference Result 51294 states and 152605 transitions. [2021-02-19 17:29:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:29:56,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:29:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:29:56,931 INFO L225 Difference]: With dead ends: 51294 [2021-02-19 17:29:56,931 INFO L226 Difference]: Without dead ends: 51294 [2021-02-19 17:29:56,931 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:29:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51294 states. [2021-02-19 17:29:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51294 to 34308. [2021-02-19 17:29:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34308 states, 34307 states have (on average 2.9928877488559187) internal successors, (102677), 34307 states have internal predecessors, (102677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34308 states to 34308 states and 102677 transitions. [2021-02-19 17:29:57,765 INFO L78 Accepts]: Start accepts. Automaton has 34308 states and 102677 transitions. Word has length 25 [2021-02-19 17:29:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:29:57,765 INFO L480 AbstractCegarLoop]: Abstraction has 34308 states and 102677 transitions. [2021-02-19 17:29:57,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:29:57,765 INFO L276 IsEmpty]: Start isEmpty. Operand 34308 states and 102677 transitions. [2021-02-19 17:29:57,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:29:57,793 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:29:57,793 INFO L506 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:29:57,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21839,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:57,994 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:29:57,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:29:57,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1105578920, now seen corresponding path program 447 times [2021-02-19 17:29:57,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:29:57,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041808715] [2021-02-19 17:29:57,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:29:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:29:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:29:58,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041808715] [2021-02-19 17:29:58,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865988458] [2021-02-19 17:29:58,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:29:58,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:29:58,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:29:58,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:29:58,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:29:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-02-19 17:29:58,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:29:58,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-02-19 17:29:58,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370087603] [2021-02-19 17:29:58,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 17:29:58,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:29:58,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 17:29:58,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:29:58,283 INFO L87 Difference]: Start difference. First operand 34308 states and 102677 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:00,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:00,831 INFO L93 Difference]: Finished difference Result 67668 states and 201004 transitions. [2021-02-19 17:30:00,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-02-19 17:30:00,832 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:00,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:00,943 INFO L225 Difference]: With dead ends: 67668 [2021-02-19 17:30:00,943 INFO L226 Difference]: Without dead ends: 67638 [2021-02-19 17:30:00,944 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7552 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1915, Invalid=18677, Unknown=0, NotChecked=0, Total=20592 [2021-02-19 17:30:00,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67638 states. [2021-02-19 17:30:01,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67638 to 38317. [2021-02-19 17:30:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38317 states, 38316 states have (on average 2.9630180603403278) internal successors, (113531), 38316 states have internal predecessors, (113531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38317 states to 38317 states and 113531 transitions. [2021-02-19 17:30:01,932 INFO L78 Accepts]: Start accepts. Automaton has 38317 states and 113531 transitions. Word has length 25 [2021-02-19 17:30:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:01,932 INFO L480 AbstractCegarLoop]: Abstraction has 38317 states and 113531 transitions. [2021-02-19 17:30:01,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:01,932 INFO L276 IsEmpty]: Start isEmpty. Operand 38317 states and 113531 transitions. [2021-02-19 17:30:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:01,964 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:01,964 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:02,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21840,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:02,165 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:02,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2050340903, now seen corresponding path program 448 times [2021-02-19 17:30:02,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:02,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164457662] [2021-02-19 17:30:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:02,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164457662] [2021-02-19 17:30:02,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099672966] [2021-02-19 17:30:02,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:02,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:30:02,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:02,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:02,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 45 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:30:02,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:02,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:30:02,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066719115] [2021-02-19 17:30:02,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:30:02,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:02,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:30:02,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:30:02,315 INFO L87 Difference]: Start difference. First operand 38317 states and 113531 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:02,622 INFO L93 Difference]: Finished difference Result 38896 states and 114322 transitions. [2021-02-19 17:30:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:30:02,623 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:02,675 INFO L225 Difference]: With dead ends: 38896 [2021-02-19 17:30:02,675 INFO L226 Difference]: Without dead ends: 38892 [2021-02-19 17:30:02,676 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:30:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38892 states. [2021-02-19 17:30:03,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38892 to 38331. [2021-02-19 17:30:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38331 states, 38330 states have (on average 2.9629272110618317) internal successors, (113569), 38330 states have internal predecessors, (113569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38331 states to 38331 states and 113569 transitions. [2021-02-19 17:30:03,525 INFO L78 Accepts]: Start accepts. Automaton has 38331 states and 113569 transitions. Word has length 25 [2021-02-19 17:30:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:03,525 INFO L480 AbstractCegarLoop]: Abstraction has 38331 states and 113569 transitions. [2021-02-19 17:30:03,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 38331 states and 113569 transitions. [2021-02-19 17:30:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:03,558 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:03,558 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:03,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21841,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:03,759 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:03,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:03,759 INFO L82 PathProgramCache]: Analyzing trace with hash -526877333, now seen corresponding path program 449 times [2021-02-19 17:30:03,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:03,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754492192] [2021-02-19 17:30:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:03,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754492192] [2021-02-19 17:30:03,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809108573] [2021-02-19 17:30:03,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:03,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:30:03,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:03,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:03,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 44 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:03,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:03,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:30:03,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414706569] [2021-02-19 17:30:03,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:30:03,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:03,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:30:03,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:30:03,915 INFO L87 Difference]: Start difference. First operand 38331 states and 113569 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:04,134 INFO L93 Difference]: Finished difference Result 41497 states and 121610 transitions. [2021-02-19 17:30:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:30:04,135 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:04,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:04,194 INFO L225 Difference]: With dead ends: 41497 [2021-02-19 17:30:04,194 INFO L226 Difference]: Without dead ends: 41497 [2021-02-19 17:30:04,195 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:30:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41497 states. [2021-02-19 17:30:04,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41497 to 38348. [2021-02-19 17:30:05,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38348 states, 38347 states have (on average 2.962708947244895) internal successors, (113611), 38347 states have internal predecessors, (113611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38348 states to 38348 states and 113611 transitions. [2021-02-19 17:30:05,110 INFO L78 Accepts]: Start accepts. Automaton has 38348 states and 113611 transitions. Word has length 25 [2021-02-19 17:30:05,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:05,110 INFO L480 AbstractCegarLoop]: Abstraction has 38348 states and 113611 transitions. [2021-02-19 17:30:05,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 38348 states and 113611 transitions. [2021-02-19 17:30:05,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:05,144 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:05,144 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:05,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21842 [2021-02-19 17:30:05,345 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:05,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2039042629, now seen corresponding path program 450 times [2021-02-19 17:30:05,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:05,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095788075] [2021-02-19 17:30:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:30:05,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095788075] [2021-02-19 17:30:05,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387331409] [2021-02-19 17:30:05,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:05,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:30:05,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:05,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:05,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:30:05,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:05,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:30:05,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495653623] [2021-02-19 17:30:05,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:30:05,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:05,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:30:05,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:30:05,509 INFO L87 Difference]: Start difference. First operand 38348 states and 113611 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:05,752 INFO L93 Difference]: Finished difference Result 43357 states and 127026 transitions. [2021-02-19 17:30:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:30:05,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:05,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:05,817 INFO L225 Difference]: With dead ends: 43357 [2021-02-19 17:30:05,817 INFO L226 Difference]: Without dead ends: 43357 [2021-02-19 17:30:05,818 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:30:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43357 states. [2021-02-19 17:30:06,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43357 to 38353. [2021-02-19 17:30:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38353 states, 38352 states have (on average 2.9625573633708804) internal successors, (113620), 38352 states have internal predecessors, (113620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38353 states to 38353 states and 113620 transitions. [2021-02-19 17:30:06,744 INFO L78 Accepts]: Start accepts. Automaton has 38353 states and 113620 transitions. Word has length 25 [2021-02-19 17:30:06,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:06,744 INFO L480 AbstractCegarLoop]: Abstraction has 38353 states and 113620 transitions. [2021-02-19 17:30:06,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:06,744 INFO L276 IsEmpty]: Start isEmpty. Operand 38353 states and 113620 transitions. [2021-02-19 17:30:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:06,776 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:06,776 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:06,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21843 [2021-02-19 17:30:06,977 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:06,977 INFO L82 PathProgramCache]: Analyzing trace with hash -21817173, now seen corresponding path program 451 times [2021-02-19 17:30:06,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:06,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810412892] [2021-02-19 17:30:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:07,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810412892] [2021-02-19 17:30:07,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37929699] [2021-02-19 17:30:07,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:07,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:07,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:07,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:07,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:30:07,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523220895] [2021-02-19 17:30:07,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:30:07,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:07,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:30:07,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:30:07,146 INFO L87 Difference]: Start difference. First operand 38353 states and 113620 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:07,393 INFO L93 Difference]: Finished difference Result 42826 states and 125594 transitions. [2021-02-19 17:30:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:30:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:07,455 INFO L225 Difference]: With dead ends: 42826 [2021-02-19 17:30:07,455 INFO L226 Difference]: Without dead ends: 42826 [2021-02-19 17:30:07,455 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=315, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:30:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42826 states. [2021-02-19 17:30:08,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42826 to 38289. [2021-02-19 17:30:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38289 states, 38288 states have (on average 2.9619985374007523) internal successors, (113409), 38288 states have internal predecessors, (113409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38289 states to 38289 states and 113409 transitions. [2021-02-19 17:30:08,349 INFO L78 Accepts]: Start accepts. Automaton has 38289 states and 113409 transitions. Word has length 25 [2021-02-19 17:30:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:08,349 INFO L480 AbstractCegarLoop]: Abstraction has 38289 states and 113409 transitions. [2021-02-19 17:30:08,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 38289 states and 113409 transitions. [2021-02-19 17:30:08,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:08,383 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:08,383 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:08,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21844,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:08,584 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:08,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:08,584 INFO L82 PathProgramCache]: Analyzing trace with hash 516038405, now seen corresponding path program 452 times [2021-02-19 17:30:08,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:08,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316331821] [2021-02-19 17:30:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:30:08,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316331821] [2021-02-19 17:30:08,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645605039] [2021-02-19 17:30:08,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:08,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:30:08,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:08,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:08,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:30:08,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:08,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:30:08,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390129385] [2021-02-19 17:30:08,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:30:08,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:08,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:30:08,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:30:08,761 INFO L87 Difference]: Start difference. First operand 38289 states and 113409 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:09,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:09,063 INFO L93 Difference]: Finished difference Result 63642 states and 188787 transitions. [2021-02-19 17:30:09,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:30:09,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:09,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:09,176 INFO L225 Difference]: With dead ends: 63642 [2021-02-19 17:30:09,176 INFO L226 Difference]: Without dead ends: 63642 [2021-02-19 17:30:09,176 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:30:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63642 states. [2021-02-19 17:30:10,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63642 to 58587. [2021-02-19 17:30:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58587 states, 58586 states have (on average 2.9905096780800875) internal successors, (175202), 58586 states have internal predecessors, (175202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58587 states to 58587 states and 175202 transitions. [2021-02-19 17:30:10,357 INFO L78 Accepts]: Start accepts. Automaton has 58587 states and 175202 transitions. Word has length 25 [2021-02-19 17:30:10,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:10,357 INFO L480 AbstractCegarLoop]: Abstraction has 58587 states and 175202 transitions. [2021-02-19 17:30:10,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:10,357 INFO L276 IsEmpty]: Start isEmpty. Operand 58587 states and 175202 transitions. [2021-02-19 17:30:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:10,399 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:10,399 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:10,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21845 [2021-02-19 17:30:10,599 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:10,599 INFO L82 PathProgramCache]: Analyzing trace with hash 9692139, now seen corresponding path program 453 times [2021-02-19 17:30:10,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:10,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039052578] [2021-02-19 17:30:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:10,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039052578] [2021-02-19 17:30:10,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687605345] [2021-02-19 17:30:10,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:10,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-02-19 17:30:10,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:10,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:10,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:10,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:10,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-02-19 17:30:10,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188992094] [2021-02-19 17:30:10,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:30:10,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:10,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:30:10,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:30:10,787 INFO L87 Difference]: Start difference. First operand 58587 states and 175202 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:11,159 INFO L93 Difference]: Finished difference Result 65804 states and 194963 transitions. [2021-02-19 17:30:11,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:30:11,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:11,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:11,279 INFO L225 Difference]: With dead ends: 65804 [2021-02-19 17:30:11,279 INFO L226 Difference]: Without dead ends: 65804 [2021-02-19 17:30:11,279 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:30:11,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65804 states. [2021-02-19 17:30:12,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65804 to 58424. [2021-02-19 17:30:12,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58424 states, 58423 states have (on average 2.9897985382469234) internal successors, (174673), 58423 states have internal predecessors, (174673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:12,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58424 states to 58424 states and 174673 transitions. [2021-02-19 17:30:12,744 INFO L78 Accepts]: Start accepts. Automaton has 58424 states and 174673 transitions. Word has length 25 [2021-02-19 17:30:12,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:12,744 INFO L480 AbstractCegarLoop]: Abstraction has 58424 states and 174673 transitions. [2021-02-19 17:30:12,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:12,744 INFO L276 IsEmpty]: Start isEmpty. Operand 58424 states and 174673 transitions. [2021-02-19 17:30:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:12,786 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:12,786 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:12,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21846 [2021-02-19 17:30:12,986 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:12,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:12,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1492827077, now seen corresponding path program 454 times [2021-02-19 17:30:12,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:12,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264031258] [2021-02-19 17:30:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:13,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264031258] [2021-02-19 17:30:13,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023531887] [2021-02-19 17:30:13,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:13,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:30:13,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:13,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:13,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:13,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:13,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-02-19 17:30:13,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493316332] [2021-02-19 17:30:13,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:30:13,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:13,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:30:13,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:30:13,180 INFO L87 Difference]: Start difference. First operand 58424 states and 174673 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:13,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:13,734 INFO L93 Difference]: Finished difference Result 92185 states and 275831 transitions. [2021-02-19 17:30:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:30:13,735 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:13,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:13,893 INFO L225 Difference]: With dead ends: 92185 [2021-02-19 17:30:13,893 INFO L226 Difference]: Without dead ends: 92185 [2021-02-19 17:30:13,894 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=418, Invalid=772, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:30:13,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92185 states. [2021-02-19 17:30:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92185 to 82679. [2021-02-19 17:30:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82679 states, 82678 states have (on average 3.017634679116573) internal successors, (249492), 82678 states have internal predecessors, (249492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82679 states to 82679 states and 249492 transitions. [2021-02-19 17:30:15,944 INFO L78 Accepts]: Start accepts. Automaton has 82679 states and 249492 transitions. Word has length 25 [2021-02-19 17:30:15,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:15,944 INFO L480 AbstractCegarLoop]: Abstraction has 82679 states and 249492 transitions. [2021-02-19 17:30:15,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 82679 states and 249492 transitions. [2021-02-19 17:30:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:16,045 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:16,045 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:16,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21847,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:16,265 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:16,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:16,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1634663411, now seen corresponding path program 455 times [2021-02-19 17:30:16,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:16,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793220156] [2021-02-19 17:30:16,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:30:16,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793220156] [2021-02-19 17:30:16,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110328810] [2021-02-19 17:30:16,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:16,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:30:16,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:16,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:16,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:30:16,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:16,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:30:16,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968941148] [2021-02-19 17:30:16,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:30:16,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:16,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:30:16,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:30:16,450 INFO L87 Difference]: Start difference. First operand 82679 states and 249492 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:16,809 INFO L93 Difference]: Finished difference Result 83255 states and 250211 transitions. [2021-02-19 17:30:16,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:30:16,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:16,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:16,947 INFO L225 Difference]: With dead ends: 83255 [2021-02-19 17:30:16,947 INFO L226 Difference]: Without dead ends: 83254 [2021-02-19 17:30:16,947 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:30:17,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83254 states. [2021-02-19 17:30:18,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83254 to 82202. [2021-02-19 17:30:18,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82202 states, 82201 states have (on average 3.0162406783372466) internal successors, (247938), 82201 states have internal predecessors, (247938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82202 states to 82202 states and 247938 transitions. [2021-02-19 17:30:18,853 INFO L78 Accepts]: Start accepts. Automaton has 82202 states and 247938 transitions. Word has length 25 [2021-02-19 17:30:18,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:18,853 INFO L480 AbstractCegarLoop]: Abstraction has 82202 states and 247938 transitions. [2021-02-19 17:30:18,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:18,853 INFO L276 IsEmpty]: Start isEmpty. Operand 82202 states and 247938 transitions. [2021-02-19 17:30:18,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:18,916 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:18,916 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:19,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21848,457 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:19,117 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:19,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2141009677, now seen corresponding path program 456 times [2021-02-19 17:30:19,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:19,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942914518] [2021-02-19 17:30:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:19,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942914518] [2021-02-19 17:30:19,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372244082] [2021-02-19 17:30:19,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:19,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 17:30:19,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:19,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:19,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:19,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:19,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-02-19 17:30:19,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277724317] [2021-02-19 17:30:19,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:30:19,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:19,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:30:19,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:30:19,299 INFO L87 Difference]: Start difference. First operand 82202 states and 247938 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:19,737 INFO L93 Difference]: Finished difference Result 90826 states and 272458 transitions. [2021-02-19 17:30:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:30:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:19,892 INFO L225 Difference]: With dead ends: 90826 [2021-02-19 17:30:19,892 INFO L226 Difference]: Without dead ends: 90826 [2021-02-19 17:30:19,893 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:30:19,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90826 states. [2021-02-19 17:30:21,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90826 to 54686. [2021-02-19 17:30:21,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54686 states, 54685 states have (on average 2.9790253268720854) internal successors, (162908), 54685 states have internal predecessors, (162908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:21,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54686 states to 54686 states and 162908 transitions. [2021-02-19 17:30:21,658 INFO L78 Accepts]: Start accepts. Automaton has 54686 states and 162908 transitions. Word has length 25 [2021-02-19 17:30:21,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:21,658 INFO L480 AbstractCegarLoop]: Abstraction has 54686 states and 162908 transitions. [2021-02-19 17:30:21,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:21,659 INFO L276 IsEmpty]: Start isEmpty. Operand 54686 states and 162908 transitions. [2021-02-19 17:30:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:21,694 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:21,694 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:21,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21849,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:21,895 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:21,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:21,895 INFO L82 PathProgramCache]: Analyzing trace with hash -657874739, now seen corresponding path program 457 times [2021-02-19 17:30:21,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:21,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308135630] [2021-02-19 17:30:21,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:21,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308135630] [2021-02-19 17:30:21,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711133564] [2021-02-19 17:30:21,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:22,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:22,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:22,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:22,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-02-19 17:30:22,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976068365] [2021-02-19 17:30:22,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:30:22,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:22,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:30:22,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:30:22,081 INFO L87 Difference]: Start difference. First operand 54686 states and 162908 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:22,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:22,563 INFO L93 Difference]: Finished difference Result 77656 states and 229939 transitions. [2021-02-19 17:30:22,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:30:22,564 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:22,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:22,700 INFO L225 Difference]: With dead ends: 77656 [2021-02-19 17:30:22,700 INFO L226 Difference]: Without dead ends: 77656 [2021-02-19 17:30:22,700 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:30:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77656 states. [2021-02-19 17:30:23,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77656 to 43900. [2021-02-19 17:30:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43900 states, 43899 states have (on average 2.9658306567347776) internal successors, (130197), 43899 states have internal predecessors, (130197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:23,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43900 states to 43900 states and 130197 transitions. [2021-02-19 17:30:23,823 INFO L78 Accepts]: Start accepts. Automaton has 43900 states and 130197 transitions. Word has length 25 [2021-02-19 17:30:23,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:23,823 INFO L480 AbstractCegarLoop]: Abstraction has 43900 states and 130197 transitions. [2021-02-19 17:30:23,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:23,823 INFO L276 IsEmpty]: Start isEmpty. Operand 43900 states and 130197 transitions. [2021-02-19 17:30:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:23,857 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:23,857 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:24,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21850,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:24,058 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1086489267, now seen corresponding path program 458 times [2021-02-19 17:30:24,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:24,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448803595] [2021-02-19 17:30:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:24,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448803595] [2021-02-19 17:30:24,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558527678] [2021-02-19 17:30:24,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:24,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:30:24,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:24,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:24,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:24,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:24,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-02-19 17:30:24,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560985817] [2021-02-19 17:30:24,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:30:24,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:24,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:30:24,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:30:24,247 INFO L87 Difference]: Start difference. First operand 43900 states and 130197 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:24,690 INFO L93 Difference]: Finished difference Result 74220 states and 219991 transitions. [2021-02-19 17:30:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:30:24,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:24,814 INFO L225 Difference]: With dead ends: 74220 [2021-02-19 17:30:24,814 INFO L226 Difference]: Without dead ends: 74220 [2021-02-19 17:30:24,814 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=370, Invalid=686, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:30:24,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74220 states. [2021-02-19 17:30:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74220 to 67881. [2021-02-19 17:30:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67881 states, 67880 states have (on average 2.9857248084855628) internal successors, (202671), 67880 states have internal predecessors, (202671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67881 states to 67881 states and 202671 transitions. [2021-02-19 17:30:26,294 INFO L78 Accepts]: Start accepts. Automaton has 67881 states and 202671 transitions. Word has length 25 [2021-02-19 17:30:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:26,294 INFO L480 AbstractCegarLoop]: Abstraction has 67881 states and 202671 transitions. [2021-02-19 17:30:26,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 67881 states and 202671 transitions. [2021-02-19 17:30:26,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:26,339 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:26,339 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:26,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21851,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:26,540 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:26,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:26,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1007536239, now seen corresponding path program 459 times [2021-02-19 17:30:26,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:26,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451813718] [2021-02-19 17:30:26,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:26,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451813718] [2021-02-19 17:30:26,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886032972] [2021-02-19 17:30:26,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:26,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:30:26,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:26,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:26,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:30:26,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:26,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:30:26,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629126638] [2021-02-19 17:30:26,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:30:26,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:26,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:30:26,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:30:26,691 INFO L87 Difference]: Start difference. First operand 67881 states and 202671 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:27,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:27,117 INFO L93 Difference]: Finished difference Result 68391 states and 203359 transitions. [2021-02-19 17:30:27,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:30:27,118 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:27,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:27,244 INFO L225 Difference]: With dead ends: 68391 [2021-02-19 17:30:27,244 INFO L226 Difference]: Without dead ends: 68387 [2021-02-19 17:30:27,244 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:30:27,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68387 states. [2021-02-19 17:30:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68387 to 67895. [2021-02-19 17:30:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67895 states, 67894 states have (on average 2.9853006156655963) internal successors, (202684), 67894 states have internal predecessors, (202684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67895 states to 67895 states and 202684 transitions. [2021-02-19 17:30:28,617 INFO L78 Accepts]: Start accepts. Automaton has 67895 states and 202684 transitions. Word has length 25 [2021-02-19 17:30:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:28,617 INFO L480 AbstractCegarLoop]: Abstraction has 67895 states and 202684 transitions. [2021-02-19 17:30:28,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand 67895 states and 202684 transitions. [2021-02-19 17:30:28,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:28,664 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:28,664 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:28,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21852 [2021-02-19 17:30:28,865 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:28,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1569681997, now seen corresponding path program 460 times [2021-02-19 17:30:28,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:28,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022144595] [2021-02-19 17:30:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:30:29,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022144595] [2021-02-19 17:30:29,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683348799] [2021-02-19 17:30:29,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:29,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:30:29,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:29,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:29,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:30:29,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:29,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:30:29,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971017832] [2021-02-19 17:30:29,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:30:29,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:29,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:30:29,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:30:29,368 INFO L87 Difference]: Start difference. First operand 67895 states and 202684 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:29,696 INFO L93 Difference]: Finished difference Result 74332 states and 220544 transitions. [2021-02-19 17:30:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:30:29,697 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:29,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:29,817 INFO L225 Difference]: With dead ends: 74332 [2021-02-19 17:30:29,818 INFO L226 Difference]: Without dead ends: 74332 [2021-02-19 17:30:29,818 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:30:29,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74332 states. [2021-02-19 17:30:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74332 to 67926. [2021-02-19 17:30:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67926 states, 67925 states have (on average 2.9852042694147958) internal successors, (202770), 67925 states have internal predecessors, (202770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67926 states to 67926 states and 202770 transitions. [2021-02-19 17:30:31,144 INFO L78 Accepts]: Start accepts. Automaton has 67926 states and 202770 transitions. Word has length 25 [2021-02-19 17:30:31,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:31,144 INFO L480 AbstractCegarLoop]: Abstraction has 67926 states and 202770 transitions. [2021-02-19 17:30:31,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:31,144 INFO L276 IsEmpty]: Start isEmpty. Operand 67926 states and 202770 transitions. [2021-02-19 17:30:31,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:31,190 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:31,190 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:31,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21853 [2021-02-19 17:30:31,390 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:31,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:31,390 INFO L82 PathProgramCache]: Analyzing trace with hash 996237965, now seen corresponding path program 461 times [2021-02-19 17:30:31,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:31,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363629052] [2021-02-19 17:30:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:31,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363629052] [2021-02-19 17:30:31,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531463740] [2021-02-19 17:30:31,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:31,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:30:31,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:31,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:31,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:31,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:31,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:30:31,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412773776] [2021-02-19 17:30:31,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:30:31,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:31,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:30:31,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:30:31,551 INFO L87 Difference]: Start difference. First operand 67926 states and 202770 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:32,185 INFO L93 Difference]: Finished difference Result 78841 states and 233840 transitions. [2021-02-19 17:30:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:30:32,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:32,322 INFO L225 Difference]: With dead ends: 78841 [2021-02-19 17:30:32,322 INFO L226 Difference]: Without dead ends: 78841 [2021-02-19 17:30:32,322 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=215, Invalid=337, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:30:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78841 states. [2021-02-19 17:30:33,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78841 to 67947. [2021-02-19 17:30:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67947 states, 67946 states have (on average 2.9851205368969476) internal successors, (202827), 67946 states have internal predecessors, (202827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67947 states to 67947 states and 202827 transitions. [2021-02-19 17:30:33,608 INFO L78 Accepts]: Start accepts. Automaton has 67947 states and 202827 transitions. Word has length 25 [2021-02-19 17:30:33,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:33,608 INFO L480 AbstractCegarLoop]: Abstraction has 67947 states and 202827 transitions. [2021-02-19 17:30:33,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:33,608 INFO L276 IsEmpty]: Start isEmpty. Operand 67947 states and 202827 transitions. [2021-02-19 17:30:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:33,652 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:33,652 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:33,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21854,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:33,852 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:33,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:33,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1064621837, now seen corresponding path program 462 times [2021-02-19 17:30:33,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:33,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086066780] [2021-02-19 17:30:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:30:33,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086066780] [2021-02-19 17:30:33,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899326387] [2021-02-19 17:30:33,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:33,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:30:33,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:33,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:33,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:30:34,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:34,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:30:34,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253530494] [2021-02-19 17:30:34,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:30:34,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:34,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:30:34,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:30:34,043 INFO L87 Difference]: Start difference. First operand 67947 states and 202827 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:34,552 INFO L93 Difference]: Finished difference Result 114383 states and 343734 transitions. [2021-02-19 17:30:34,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:30:34,553 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:34,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:34,774 INFO L225 Difference]: With dead ends: 114383 [2021-02-19 17:30:34,774 INFO L226 Difference]: Without dead ends: 114383 [2021-02-19 17:30:34,774 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:30:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114383 states. [2021-02-19 17:30:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114383 to 104064. [2021-02-19 17:30:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104064 states, 104063 states have (on average 3.0234665539144556) internal successors, (314631), 104063 states have internal predecessors, (314631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104064 states to 104064 states and 314631 transitions. [2021-02-19 17:30:37,174 INFO L78 Accepts]: Start accepts. Automaton has 104064 states and 314631 transitions. Word has length 25 [2021-02-19 17:30:37,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:37,174 INFO L480 AbstractCegarLoop]: Abstraction has 104064 states and 314631 transitions. [2021-02-19 17:30:37,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:37,174 INFO L276 IsEmpty]: Start isEmpty. Operand 104064 states and 314631 transitions. [2021-02-19 17:30:37,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:37,239 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:37,239 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:37,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21855 [2021-02-19 17:30:37,439 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:37,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:37,439 INFO L82 PathProgramCache]: Analyzing trace with hash -526766259, now seen corresponding path program 463 times [2021-02-19 17:30:37,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:37,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737008301] [2021-02-19 17:30:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:37,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737008301] [2021-02-19 17:30:37,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019650207] [2021-02-19 17:30:37,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:37,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:37,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:37,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:37,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:30:37,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454736035] [2021-02-19 17:30:37,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:30:37,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:30:37,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:30:37,610 INFO L87 Difference]: Start difference. First operand 104064 states and 314631 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:38,502 INFO L93 Difference]: Finished difference Result 110227 states and 331406 transitions. [2021-02-19 17:30:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:30:38,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:38,715 INFO L225 Difference]: With dead ends: 110227 [2021-02-19 17:30:38,715 INFO L226 Difference]: Without dead ends: 110227 [2021-02-19 17:30:38,715 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:30:38,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110227 states. [2021-02-19 17:30:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110227 to 102316. [2021-02-19 17:30:40,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102316 states, 102315 states have (on average 3.0208082881297953) internal successors, (309074), 102315 states have internal predecessors, (309074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:41,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102316 states to 102316 states and 309074 transitions. [2021-02-19 17:30:41,007 INFO L78 Accepts]: Start accepts. Automaton has 102316 states and 309074 transitions. Word has length 25 [2021-02-19 17:30:41,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:41,007 INFO L480 AbstractCegarLoop]: Abstraction has 102316 states and 309074 transitions. [2021-02-19 17:30:41,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 102316 states and 309074 transitions. [2021-02-19 17:30:41,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:41,071 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:41,071 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:41,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21856,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:41,272 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:41,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1033112525, now seen corresponding path program 464 times [2021-02-19 17:30:41,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:41,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73799563] [2021-02-19 17:30:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:30:41,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73799563] [2021-02-19 17:30:41,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245214014] [2021-02-19 17:30:41,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:41,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:30:41,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:41,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:41,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:30:41,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:41,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:30:41,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614011594] [2021-02-19 17:30:41,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:30:41,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:41,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:30:41,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:30:41,448 INFO L87 Difference]: Start difference. First operand 102316 states and 309074 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:42,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:42,159 INFO L93 Difference]: Finished difference Result 187537 states and 567903 transitions. [2021-02-19 17:30:42,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:30:42,160 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:43,059 INFO L225 Difference]: With dead ends: 187537 [2021-02-19 17:30:43,059 INFO L226 Difference]: Without dead ends: 187537 [2021-02-19 17:30:43,060 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:30:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187537 states. [2021-02-19 17:30:46,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187537 to 185932. [2021-02-19 17:30:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185932 states, 185931 states have (on average 3.0352281222604085) internal successors, (564343), 185931 states have internal predecessors, (564343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:46,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185932 states to 185932 states and 564343 transitions. [2021-02-19 17:30:46,988 INFO L78 Accepts]: Start accepts. Automaton has 185932 states and 564343 transitions. Word has length 25 [2021-02-19 17:30:46,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:46,988 INFO L480 AbstractCegarLoop]: Abstraction has 185932 states and 564343 transitions. [2021-02-19 17:30:46,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 185932 states and 564343 transitions. [2021-02-19 17:30:47,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:47,078 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:47,078 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:47,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21857,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:47,278 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:47,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:47,278 INFO L82 PathProgramCache]: Analyzing trace with hash 450022413, now seen corresponding path program 465 times [2021-02-19 17:30:47,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:47,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266840341] [2021-02-19 17:30:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:47,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266840341] [2021-02-19 17:30:47,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673598966] [2021-02-19 17:30:47,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:47,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 17:30:47,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:47,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:47,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:47,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:47,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-02-19 17:30:47,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147383899] [2021-02-19 17:30:47,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:30:47,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:47,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:30:47,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:30:47,472 INFO L87 Difference]: Start difference. First operand 185932 states and 564343 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:49,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:49,003 INFO L93 Difference]: Finished difference Result 189592 states and 573821 transitions. [2021-02-19 17:30:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:30:49,004 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:49,388 INFO L225 Difference]: With dead ends: 189592 [2021-02-19 17:30:49,388 INFO L226 Difference]: Without dead ends: 189592 [2021-02-19 17:30:49,389 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:30:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189592 states. [2021-02-19 17:30:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189592 to 184805. [2021-02-19 17:30:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184805 states, 184804 states have (on average 3.034934308781195) internal successors, (560868), 184804 states have internal predecessors, (560868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184805 states to 184805 states and 560868 transitions. [2021-02-19 17:30:53,430 INFO L78 Accepts]: Start accepts. Automaton has 184805 states and 560868 transitions. Word has length 25 [2021-02-19 17:30:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:30:53,430 INFO L480 AbstractCegarLoop]: Abstraction has 184805 states and 560868 transitions. [2021-02-19 17:30:53,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 184805 states and 560868 transitions. [2021-02-19 17:30:53,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:30:53,520 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:30:53,520 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:30:53,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21858,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:53,720 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:30:53,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:30:53,720 INFO L82 PathProgramCache]: Analyzing trace with hash -817434765, now seen corresponding path program 466 times [2021-02-19 17:30:53,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:30:53,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877919131] [2021-02-19 17:30:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:30:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:30:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:53,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877919131] [2021-02-19 17:30:53,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093057666] [2021-02-19 17:30:53,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:30:53,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:30:53,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:30:53,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:30:53,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:30:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:30:53,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:30:53,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-02-19 17:30:53,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162632417] [2021-02-19 17:30:53,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:30:53,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:30:53,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:30:53,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:30:53,910 INFO L87 Difference]: Start difference. First operand 184805 states and 560868 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:30:55,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:30:55,837 INFO L93 Difference]: Finished difference Result 276166 states and 836199 transitions. [2021-02-19 17:30:55,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:30:55,838 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:30:55,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:30:56,440 INFO L225 Difference]: With dead ends: 276166 [2021-02-19 17:30:56,440 INFO L226 Difference]: Without dead ends: 276166 [2021-02-19 17:30:56,440 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=535, Invalid=1025, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 17:30:56,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276166 states. [2021-02-19 17:31:01,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276166 to 269031. [2021-02-19 17:31:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269031 states, 269030 states have (on average 3.0357803962383376) internal successors, (816716), 269030 states have internal predecessors, (816716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:02,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269031 states to 269031 states and 816716 transitions. [2021-02-19 17:31:02,769 INFO L78 Accepts]: Start accepts. Automaton has 269031 states and 816716 transitions. Word has length 25 [2021-02-19 17:31:02,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:02,769 INFO L480 AbstractCegarLoop]: Abstraction has 269031 states and 816716 transitions. [2021-02-19 17:31:02,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:02,769 INFO L276 IsEmpty]: Start isEmpty. Operand 269031 states and 816716 transitions. [2021-02-19 17:31:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:02,870 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:02,870 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:03,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21859,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:03,070 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:03,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:03,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1837645381, now seen corresponding path program 467 times [2021-02-19 17:31:03,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:03,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645069084] [2021-02-19 17:31:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:03,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645069084] [2021-02-19 17:31:03,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766109335] [2021-02-19 17:31:03,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:03,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 17:31:03,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:31:03,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:03,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:03,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:03,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-02-19 17:31:03,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234025502] [2021-02-19 17:31:03,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:31:03,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:03,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:31:03,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:31:03,274 INFO L87 Difference]: Start difference. First operand 269031 states and 816716 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:05,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:05,292 INFO L93 Difference]: Finished difference Result 314989 states and 953656 transitions. [2021-02-19 17:31:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:31:05,293 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:05,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:05,948 INFO L225 Difference]: With dead ends: 314989 [2021-02-19 17:31:05,948 INFO L226 Difference]: Without dead ends: 314989 [2021-02-19 17:31:05,948 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=369, Invalid=687, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:31:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314989 states. [2021-02-19 17:31:09,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314989 to 143799. [2021-02-19 17:31:09,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143799 states, 143798 states have (on average 3.011975131782083) internal successors, (433116), 143798 states have internal predecessors, (433116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143799 states to 143799 states and 433116 transitions. [2021-02-19 17:31:10,839 INFO L78 Accepts]: Start accepts. Automaton has 143799 states and 433116 transitions. Word has length 25 [2021-02-19 17:31:10,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:10,839 INFO L480 AbstractCegarLoop]: Abstraction has 143799 states and 433116 transitions. [2021-02-19 17:31:10,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:10,839 INFO L276 IsEmpty]: Start isEmpty. Operand 143799 states and 433116 transitions. [2021-02-19 17:31:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:10,916 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:10,916 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:11,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21860,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:11,117 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:11,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:11,117 INFO L82 PathProgramCache]: Analyzing trace with hash -313465723, now seen corresponding path program 468 times [2021-02-19 17:31:11,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:11,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041294405] [2021-02-19 17:31:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:31:11,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041294405] [2021-02-19 17:31:11,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018555527] [2021-02-19 17:31:11,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:11,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:31:11,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:31:11,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:11,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:31:11,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:11,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 17:31:11,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353779332] [2021-02-19 17:31:11,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:31:11,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:11,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:31:11,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:31:11,282 INFO L87 Difference]: Start difference. First operand 143799 states and 433116 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:12,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:12,010 INFO L93 Difference]: Finished difference Result 173301 states and 520076 transitions. [2021-02-19 17:31:12,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:31:12,011 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:12,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:12,361 INFO L225 Difference]: With dead ends: 173301 [2021-02-19 17:31:12,361 INFO L226 Difference]: Without dead ends: 173301 [2021-02-19 17:31:12,361 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:31:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173301 states. [2021-02-19 17:31:15,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173301 to 143983. [2021-02-19 17:31:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143983 states, 143982 states have (on average 3.0117723048714424) internal successors, (433641), 143982 states have internal predecessors, (433641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143983 states to 143983 states and 433641 transitions. [2021-02-19 17:31:16,144 INFO L78 Accepts]: Start accepts. Automaton has 143983 states and 433641 transitions. Word has length 25 [2021-02-19 17:31:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:16,144 INFO L480 AbstractCegarLoop]: Abstraction has 143983 states and 433641 transitions. [2021-02-19 17:31:16,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:16,144 INFO L276 IsEmpty]: Start isEmpty. Operand 143983 states and 433641 transitions. [2021-02-19 17:31:16,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:16,216 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:16,216 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:16,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21861 [2021-02-19 17:31:16,417 INFO L428 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:16,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:16,417 INFO L82 PathProgramCache]: Analyzing trace with hash 224389855, now seen corresponding path program 469 times [2021-02-19 17:31:16,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:16,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17546155] [2021-02-19 17:31:16,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:16,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17546155] [2021-02-19 17:31:16,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802673297] [2021-02-19 17:31:16,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:16,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:16,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:16,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:16,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:31:16,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13411448] [2021-02-19 17:31:16,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:31:16,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:16,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:31:16,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:31:16,589 INFO L87 Difference]: Start difference. First operand 143983 states and 433641 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:17,848 INFO L93 Difference]: Finished difference Result 165005 states and 495288 transitions. [2021-02-19 17:31:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:31:17,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:18,201 INFO L225 Difference]: With dead ends: 165005 [2021-02-19 17:31:18,201 INFO L226 Difference]: Without dead ends: 165005 [2021-02-19 17:31:18,201 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:31:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165005 states. [2021-02-19 17:31:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165005 to 98505. [2021-02-19 17:31:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98505 states, 98504 states have (on average 2.9995634695037765) internal successors, (295469), 98504 states have internal predecessors, (295469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:21,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98505 states to 98505 states and 295469 transitions. [2021-02-19 17:31:21,047 INFO L78 Accepts]: Start accepts. Automaton has 98505 states and 295469 transitions. Word has length 25 [2021-02-19 17:31:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:21,047 INFO L480 AbstractCegarLoop]: Abstraction has 98505 states and 295469 transitions. [2021-02-19 17:31:21,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:21,047 INFO L276 IsEmpty]: Start isEmpty. Operand 98505 states and 295469 transitions. [2021-02-19 17:31:21,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:21,095 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:21,095 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:21,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21862 [2021-02-19 17:31:21,295 INFO L428 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:21,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:21,295 INFO L82 PathProgramCache]: Analyzing trace with hash -281956411, now seen corresponding path program 470 times [2021-02-19 17:31:21,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:21,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372463080] [2021-02-19 17:31:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:31:21,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372463080] [2021-02-19 17:31:21,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581889390] [2021-02-19 17:31:21,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:21,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:31:21,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:31:21,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:21,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:31:21,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:21,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-02-19 17:31:21,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941884119] [2021-02-19 17:31:21,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:31:21,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:21,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:31:21,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:31:21,473 INFO L87 Difference]: Start difference. First operand 98505 states and 295469 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:22,558 INFO L93 Difference]: Finished difference Result 159451 states and 477830 transitions. [2021-02-19 17:31:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:31:22,558 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:22,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:22,900 INFO L225 Difference]: With dead ends: 159451 [2021-02-19 17:31:22,900 INFO L226 Difference]: Without dead ends: 159451 [2021-02-19 17:31:22,900 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:31:23,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159451 states. [2021-02-19 17:31:25,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159451 to 140783. [2021-02-19 17:31:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140783 states, 140782 states have (on average 3.006570442244037) internal successors, (423271), 140782 states have internal predecessors, (423271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140783 states to 140783 states and 423271 transitions. [2021-02-19 17:31:25,740 INFO L78 Accepts]: Start accepts. Automaton has 140783 states and 423271 transitions. Word has length 25 [2021-02-19 17:31:25,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:25,740 INFO L480 AbstractCegarLoop]: Abstraction has 140783 states and 423271 transitions. [2021-02-19 17:31:25,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:25,740 INFO L276 IsEmpty]: Start isEmpty. Operand 140783 states and 423271 transitions. [2021-02-19 17:31:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:25,809 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:25,809 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:26,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21863,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:26,010 INFO L428 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:26,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:26,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1201178527, now seen corresponding path program 471 times [2021-02-19 17:31:26,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:26,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517599957] [2021-02-19 17:31:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:26,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517599957] [2021-02-19 17:31:26,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522890089] [2021-02-19 17:31:26,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:26,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:31:26,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:31:26,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:26,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:26,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:26,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-02-19 17:31:26,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441101392] [2021-02-19 17:31:26,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:31:26,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:26,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:31:26,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:31:26,205 INFO L87 Difference]: Start difference. First operand 140783 states and 423271 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:27,873 INFO L93 Difference]: Finished difference Result 166536 states and 498805 transitions. [2021-02-19 17:31:27,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:31:27,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:27,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:28,392 INFO L225 Difference]: With dead ends: 166536 [2021-02-19 17:31:28,393 INFO L226 Difference]: Without dead ends: 166536 [2021-02-19 17:31:28,393 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:31:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166536 states. [2021-02-19 17:31:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166536 to 88648. [2021-02-19 17:31:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88648 states, 88647 states have (on average 2.994258124922445) internal successors, (265432), 88647 states have internal predecessors, (265432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88648 states to 88648 states and 265432 transitions. [2021-02-19 17:31:30,853 INFO L78 Accepts]: Start accepts. Automaton has 88648 states and 265432 transitions. Word has length 25 [2021-02-19 17:31:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:30,853 INFO L480 AbstractCegarLoop]: Abstraction has 88648 states and 265432 transitions. [2021-02-19 17:31:30,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 88648 states and 265432 transitions. [2021-02-19 17:31:30,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:30,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:30,906 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:31,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21864,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:31,107 INFO L428 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:31,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:31,107 INFO L82 PathProgramCache]: Analyzing trace with hash -66278651, now seen corresponding path program 472 times [2021-02-19 17:31:31,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:31,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040203083] [2021-02-19 17:31:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:31,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040203083] [2021-02-19 17:31:31,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65409237] [2021-02-19 17:31:31,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:31,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:31:31,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:31:31,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:31,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:31,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-02-19 17:31:31,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851609922] [2021-02-19 17:31:31,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:31:31,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:31,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:31:31,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:31:31,305 INFO L87 Difference]: Start difference. First operand 88648 states and 265432 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:32,119 INFO L93 Difference]: Finished difference Result 132223 states and 394978 transitions. [2021-02-19 17:31:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:31:32,120 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:32,388 INFO L225 Difference]: With dead ends: 132223 [2021-02-19 17:31:32,388 INFO L226 Difference]: Without dead ends: 132223 [2021-02-19 17:31:32,388 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=534, Invalid=1026, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 17:31:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132223 states. [2021-02-19 17:31:34,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132223 to 74963. [2021-02-19 17:31:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74963 states, 74962 states have (on average 3.000667004615672) internal successors, (224936), 74962 states have internal predecessors, (224936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74963 states to 74963 states and 224936 transitions. [2021-02-19 17:31:34,655 INFO L78 Accepts]: Start accepts. Automaton has 74963 states and 224936 transitions. Word has length 25 [2021-02-19 17:31:34,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:34,655 INFO L480 AbstractCegarLoop]: Abstraction has 74963 states and 224936 transitions. [2021-02-19 17:31:34,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:34,655 INFO L276 IsEmpty]: Start isEmpty. Operand 74963 states and 224936 transitions. [2021-02-19 17:31:34,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:34,702 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:34,702 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:34,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21865 [2021-02-19 17:31:34,902 INFO L428 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:34,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:34,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1014607915, now seen corresponding path program 473 times [2021-02-19 17:31:34,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:34,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747975990] [2021-02-19 17:31:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:31:35,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747975990] [2021-02-19 17:31:35,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149463544] [2021-02-19 17:31:35,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:35,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 17:31:35,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:31:35,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:35,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:31:35,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:35,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-02-19 17:31:35,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190463171] [2021-02-19 17:31:35,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:31:35,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:35,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:31:35,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:31:35,106 INFO L87 Difference]: Start difference. First operand 74963 states and 224936 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:35,450 INFO L93 Difference]: Finished difference Result 75400 states and 225378 transitions. [2021-02-19 17:31:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:31:35,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:35,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:35,582 INFO L225 Difference]: With dead ends: 75400 [2021-02-19 17:31:35,582 INFO L226 Difference]: Without dead ends: 75398 [2021-02-19 17:31:35,582 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:31:35,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75398 states. [2021-02-19 17:31:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75398 to 74545. [2021-02-19 17:31:37,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74545 states, 74544 states have (on average 2.9994634041639836) internal successors, (223592), 74544 states have internal predecessors, (223592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74545 states to 74545 states and 223592 transitions. [2021-02-19 17:31:37,291 INFO L78 Accepts]: Start accepts. Automaton has 74545 states and 223592 transitions. Word has length 25 [2021-02-19 17:31:37,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:37,291 INFO L480 AbstractCegarLoop]: Abstraction has 74545 states and 223592 transitions. [2021-02-19 17:31:37,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:37,291 INFO L276 IsEmpty]: Start isEmpty. Operand 74545 states and 223592 transitions. [2021-02-19 17:31:37,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:37,335 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:37,335 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:37,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21866,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:37,535 INFO L428 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:37,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:37,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1797224443, now seen corresponding path program 474 times [2021-02-19 17:31:37,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:37,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358090218] [2021-02-19 17:31:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:37,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358090218] [2021-02-19 17:31:37,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017669524] [2021-02-19 17:31:37,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:37,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 17:31:37,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:31:37,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:37,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:37,735 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:37,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:37,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-02-19 17:31:37,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066825625] [2021-02-19 17:31:37,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:31:37,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:37,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:31:37,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:31:37,736 INFO L87 Difference]: Start difference. First operand 74545 states and 223592 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:38,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:38,179 INFO L93 Difference]: Finished difference Result 83529 states and 249472 transitions. [2021-02-19 17:31:38,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:31:38,180 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:38,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:38,329 INFO L225 Difference]: With dead ends: 83529 [2021-02-19 17:31:38,329 INFO L226 Difference]: Without dead ends: 83529 [2021-02-19 17:31:38,330 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:31:38,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83529 states. [2021-02-19 17:31:39,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83529 to 52824. [2021-02-19 17:31:39,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52824 states, 52823 states have (on average 2.984968668951025) internal successors, (157675), 52823 states have internal predecessors, (157675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52824 states to 52824 states and 157675 transitions. [2021-02-19 17:31:39,742 INFO L78 Accepts]: Start accepts. Automaton has 52824 states and 157675 transitions. Word has length 25 [2021-02-19 17:31:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:39,742 INFO L480 AbstractCegarLoop]: Abstraction has 52824 states and 157675 transitions. [2021-02-19 17:31:39,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 52824 states and 157675 transitions. [2021-02-19 17:31:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:39,780 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:39,780 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:39,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21867,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:39,981 INFO L428 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:39,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1230285675, now seen corresponding path program 475 times [2021-02-19 17:31:39,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:39,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492912476] [2021-02-19 17:31:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:40,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492912476] [2021-02-19 17:31:40,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705936588] [2021-02-19 17:31:40,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:40,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:40,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:40,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:40,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-02-19 17:31:40,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967583200] [2021-02-19 17:31:40,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:31:40,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:40,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:31:40,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:31:40,469 INFO L87 Difference]: Start difference. First operand 52824 states and 157675 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:41,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:41,034 INFO L93 Difference]: Finished difference Result 77991 states and 231345 transitions. [2021-02-19 17:31:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:31:41,035 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:41,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:41,178 INFO L225 Difference]: With dead ends: 77991 [2021-02-19 17:31:41,178 INFO L226 Difference]: Without dead ends: 77991 [2021-02-19 17:31:41,178 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=541, Invalid=1019, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 17:31:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77991 states. [2021-02-19 17:31:42,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77991 to 41244. [2021-02-19 17:31:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41244 states, 41243 states have (on average 2.985549062871275) internal successors, (123133), 41243 states have internal predecessors, (123133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41244 states to 41244 states and 123133 transitions. [2021-02-19 17:31:42,272 INFO L78 Accepts]: Start accepts. Automaton has 41244 states and 123133 transitions. Word has length 25 [2021-02-19 17:31:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:42,272 INFO L480 AbstractCegarLoop]: Abstraction has 41244 states and 123133 transitions. [2021-02-19 17:31:42,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:42,272 INFO L276 IsEmpty]: Start isEmpty. Operand 41244 states and 123133 transitions. [2021-02-19 17:31:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:42,307 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:42,307 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:42,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21868,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:42,507 INFO L428 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:42,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:42,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2035492293, now seen corresponding path program 476 times [2021-02-19 17:31:42,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:42,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59709042] [2021-02-19 17:31:42,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:31:42,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59709042] [2021-02-19 17:31:42,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983167590] [2021-02-19 17:31:42,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:42,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:31:42,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:31:42,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:42,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 17:31:42,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:42,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 17:31:42,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796555140] [2021-02-19 17:31:42,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:31:42,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:42,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:31:42,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:31:42,650 INFO L87 Difference]: Start difference. First operand 41244 states and 123133 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:42,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:42,954 INFO L93 Difference]: Finished difference Result 41616 states and 123571 transitions. [2021-02-19 17:31:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:31:42,955 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:42,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:43,014 INFO L225 Difference]: With dead ends: 41616 [2021-02-19 17:31:43,014 INFO L226 Difference]: Without dead ends: 41612 [2021-02-19 17:31:43,014 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:31:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41612 states. [2021-02-19 17:31:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41612 to 41244. [2021-02-19 17:31:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41244 states, 41243 states have (on average 2.985427830177242) internal successors, (123128), 41243 states have internal predecessors, (123128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41244 states to 41244 states and 123128 transitions. [2021-02-19 17:31:43,770 INFO L78 Accepts]: Start accepts. Automaton has 41244 states and 123128 transitions. Word has length 25 [2021-02-19 17:31:43,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:43,770 INFO L480 AbstractCegarLoop]: Abstraction has 41244 states and 123128 transitions. [2021-02-19 17:31:43,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:43,770 INFO L276 IsEmpty]: Start isEmpty. Operand 41244 states and 123128 transitions. [2021-02-19 17:31:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:43,804 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:43,804 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:44,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21869 [2021-02-19 17:31:44,005 INFO L428 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:44,005 INFO L82 PathProgramCache]: Analyzing trace with hash -529004987, now seen corresponding path program 477 times [2021-02-19 17:31:44,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:44,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415534821] [2021-02-19 17:31:44,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:44,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415534821] [2021-02-19 17:31:44,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784239564] [2021-02-19 17:31:44,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:44,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:31:44,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:31:44,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:44,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:44,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:44,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-02-19 17:31:44,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286581362] [2021-02-19 17:31:44,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:31:44,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:44,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:31:44,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:31:44,208 INFO L87 Difference]: Start difference. First operand 41244 states and 123128 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:44,687 INFO L93 Difference]: Finished difference Result 67947 states and 201535 transitions. [2021-02-19 17:31:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:31:44,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:44,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:44,806 INFO L225 Difference]: With dead ends: 67947 [2021-02-19 17:31:44,807 INFO L226 Difference]: Without dead ends: 67947 [2021-02-19 17:31:44,807 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=460, Invalid=872, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 17:31:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67947 states. [2021-02-19 17:31:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67947 to 59973. [2021-02-19 17:31:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59973 states, 59972 states have (on average 2.9907957046621756) internal successors, (179364), 59972 states have internal predecessors, (179364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59973 states to 59973 states and 179364 transitions. [2021-02-19 17:31:46,264 INFO L78 Accepts]: Start accepts. Automaton has 59973 states and 179364 transitions. Word has length 25 [2021-02-19 17:31:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:46,264 INFO L480 AbstractCegarLoop]: Abstraction has 59973 states and 179364 transitions. [2021-02-19 17:31:46,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:46,264 INFO L276 IsEmpty]: Start isEmpty. Operand 59973 states and 179364 transitions. [2021-02-19 17:31:46,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:46,303 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:46,303 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:46,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21870 [2021-02-19 17:31:46,504 INFO L428 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:46,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:46,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1254637273, now seen corresponding path program 478 times [2021-02-19 17:31:46,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:46,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151850519] [2021-02-19 17:31:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:46,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151850519] [2021-02-19 17:31:46,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67220848] [2021-02-19 17:31:46,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:46,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:31:46,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:31:46,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:46,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:31:46,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:46,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:31:46,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610755666] [2021-02-19 17:31:46,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:31:46,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:46,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:31:46,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:31:46,652 INFO L87 Difference]: Start difference. First operand 59973 states and 179364 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:47,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:47,031 INFO L93 Difference]: Finished difference Result 60431 states and 179971 transitions. [2021-02-19 17:31:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:31:47,032 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:47,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:47,128 INFO L225 Difference]: With dead ends: 60431 [2021-02-19 17:31:47,128 INFO L226 Difference]: Without dead ends: 60427 [2021-02-19 17:31:47,128 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:31:47,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60427 states. [2021-02-19 17:31:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60427 to 59989. [2021-02-19 17:31:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59989 states, 59988 states have (on average 2.99041474961659) internal successors, (179389), 59988 states have internal predecessors, (179389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59989 states to 59989 states and 179389 transitions. [2021-02-19 17:31:48,283 INFO L78 Accepts]: Start accepts. Automaton has 59989 states and 179389 transitions. Word has length 25 [2021-02-19 17:31:48,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:48,283 INFO L480 AbstractCegarLoop]: Abstraction has 59989 states and 179389 transitions. [2021-02-19 17:31:48,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 59989 states and 179389 transitions. [2021-02-19 17:31:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:48,324 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:48,324 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:48,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21871 [2021-02-19 17:31:48,524 INFO L428 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:48,524 INFO L82 PathProgramCache]: Analyzing trace with hash 463111787, now seen corresponding path program 479 times [2021-02-19 17:31:48,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:48,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393997710] [2021-02-19 17:31:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:48,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393997710] [2021-02-19 17:31:48,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434952632] [2021-02-19 17:31:48,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:48,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:31:48,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:31:48,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:48,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:48,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:48,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 17:31:48,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882828339] [2021-02-19 17:31:48,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:31:48,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:48,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:31:48,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:31:48,680 INFO L87 Difference]: Start difference. First operand 59989 states and 179389 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:49,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:49,006 INFO L93 Difference]: Finished difference Result 65586 states and 194861 transitions. [2021-02-19 17:31:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:31:49,007 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:49,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:49,112 INFO L225 Difference]: With dead ends: 65586 [2021-02-19 17:31:49,112 INFO L226 Difference]: Without dead ends: 65586 [2021-02-19 17:31:49,113 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:31:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65586 states. [2021-02-19 17:31:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65586 to 59999. [2021-02-19 17:31:50,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59999 states, 59998 states have (on average 2.9903496783226107) internal successors, (179415), 59998 states have internal predecessors, (179415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59999 states to 59999 states and 179415 transitions. [2021-02-19 17:31:50,671 INFO L78 Accepts]: Start accepts. Automaton has 59999 states and 179415 transitions. Word has length 25 [2021-02-19 17:31:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:50,671 INFO L480 AbstractCegarLoop]: Abstraction has 59999 states and 179415 transitions. [2021-02-19 17:31:50,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 59999 states and 179415 transitions. [2021-02-19 17:31:50,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:50,708 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:50,708 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:50,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 481 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21872 [2021-02-19 17:31:50,908 INFO L428 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:50,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1265935547, now seen corresponding path program 480 times [2021-02-19 17:31:50,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:50,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123544511] [2021-02-19 17:31:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:31:50,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123544511] [2021-02-19 17:31:50,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538610109] [2021-02-19 17:31:50,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:51,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 17:31:51,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:31:51,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:51,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:31:51,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:51,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-02-19 17:31:51,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880027258] [2021-02-19 17:31:51,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:31:51,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:51,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:31:51,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:31:51,074 INFO L87 Difference]: Start difference. First operand 59999 states and 179415 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:51,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:51,435 INFO L93 Difference]: Finished difference Result 70151 states and 208280 transitions. [2021-02-19 17:31:51,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:31:51,436 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:51,554 INFO L225 Difference]: With dead ends: 70151 [2021-02-19 17:31:51,554 INFO L226 Difference]: Without dead ends: 70151 [2021-02-19 17:31:51,554 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:31:51,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70151 states. [2021-02-19 17:31:52,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70151 to 60037. [2021-02-19 17:31:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60037 states, 60036 states have (on average 2.990355786528083) internal successors, (179529), 60036 states have internal predecessors, (179529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60037 states to 60037 states and 179529 transitions. [2021-02-19 17:31:52,799 INFO L78 Accepts]: Start accepts. Automaton has 60037 states and 179529 transitions. Word has length 25 [2021-02-19 17:31:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:52,799 INFO L480 AbstractCegarLoop]: Abstraction has 60037 states and 179529 transitions. [2021-02-19 17:31:52,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 60037 states and 179529 transitions. [2021-02-19 17:31:52,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:52,841 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:52,841 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:53,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21873 [2021-02-19 17:31:53,041 INFO L428 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:53,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:53,042 INFO L82 PathProgramCache]: Analyzing trace with hash 968171947, now seen corresponding path program 481 times [2021-02-19 17:31:53,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:53,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889855666] [2021-02-19 17:31:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:53,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889855666] [2021-02-19 17:31:53,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541589712] [2021-02-19 17:31:53,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:53,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:53,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:53,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:53,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:31:53,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430788152] [2021-02-19 17:31:53,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:31:53,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:53,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:31:53,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:31:53,211 INFO L87 Difference]: Start difference. First operand 60037 states and 179529 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:53,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:53,609 INFO L93 Difference]: Finished difference Result 72545 states and 215390 transitions. [2021-02-19 17:31:53,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:31:53,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:53,730 INFO L225 Difference]: With dead ends: 72545 [2021-02-19 17:31:53,730 INFO L226 Difference]: Without dead ends: 72545 [2021-02-19 17:31:53,731 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=302, Invalid=510, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:31:54,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72545 states. [2021-02-19 17:31:55,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72545 to 59787. [2021-02-19 17:31:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59787 states, 59786 states have (on average 2.9894958685979995) internal successors, (178730), 59786 states have internal predecessors, (178730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59787 states to 59787 states and 178730 transitions. [2021-02-19 17:31:55,202 INFO L78 Accepts]: Start accepts. Automaton has 59787 states and 178730 transitions. Word has length 25 [2021-02-19 17:31:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:55,202 INFO L480 AbstractCegarLoop]: Abstraction has 59787 states and 178730 transitions. [2021-02-19 17:31:55,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 59787 states and 178730 transitions. [2021-02-19 17:31:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:55,246 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:55,246 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:55,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21874,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:55,447 INFO L428 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:55,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:55,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1506027525, now seen corresponding path program 482 times [2021-02-19 17:31:55,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:55,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133301209] [2021-02-19 17:31:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:31:55,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133301209] [2021-02-19 17:31:55,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510137712] [2021-02-19 17:31:55,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:55,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:31:55,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:31:55,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:55,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:31:55,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:55,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-02-19 17:31:55,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375187922] [2021-02-19 17:31:55,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:31:55,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:55,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:31:55,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:31:55,628 INFO L87 Difference]: Start difference. First operand 59787 states and 178730 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:56,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:56,112 INFO L93 Difference]: Finished difference Result 93551 states and 279952 transitions. [2021-02-19 17:31:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:31:56,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:56,282 INFO L225 Difference]: With dead ends: 93551 [2021-02-19 17:31:56,282 INFO L226 Difference]: Without dead ends: 93551 [2021-02-19 17:31:56,282 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=293, Invalid=519, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:31:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93551 states. [2021-02-19 17:31:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93551 to 82951. [2021-02-19 17:31:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82951 states, 82950 states have (on average 3.0136949969861364) internal successors, (249986), 82950 states have internal predecessors, (249986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82951 states to 82951 states and 249986 transitions. [2021-02-19 17:31:58,205 INFO L78 Accepts]: Start accepts. Automaton has 82951 states and 249986 transitions. Word has length 25 [2021-02-19 17:31:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:31:58,205 INFO L480 AbstractCegarLoop]: Abstraction has 82951 states and 249986 transitions. [2021-02-19 17:31:58,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:58,205 INFO L276 IsEmpty]: Start isEmpty. Operand 82951 states and 249986 transitions. [2021-02-19 17:31:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:31:58,248 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:31:58,248 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:31:58,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21875 [2021-02-19 17:31:58,448 INFO L428 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:31:58,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:31:58,449 INFO L82 PathProgramCache]: Analyzing trace with hash 999681259, now seen corresponding path program 483 times [2021-02-19 17:31:58,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:31:58,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047756059] [2021-02-19 17:31:58,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:31:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:31:58,544 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:58,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047756059] [2021-02-19 17:31:58,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242212250] [2021-02-19 17:31:58,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:31:58,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 17:31:58,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:31:58,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:31:58,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:31:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:31:58,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:31:58,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-02-19 17:31:58,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731219592] [2021-02-19 17:31:58,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:31:58,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:31:58,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:31:58,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:31:58,638 INFO L87 Difference]: Start difference. First operand 82951 states and 249986 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:31:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:31:59,117 INFO L93 Difference]: Finished difference Result 90340 states and 270481 transitions. [2021-02-19 17:31:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:31:59,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:31:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:31:59,285 INFO L225 Difference]: With dead ends: 90340 [2021-02-19 17:31:59,285 INFO L226 Difference]: Without dead ends: 90340 [2021-02-19 17:31:59,285 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:31:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90340 states. [2021-02-19 17:32:00,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90340 to 81109. [2021-02-19 17:32:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81109 states, 81108 states have (on average 3.0119100458647727) internal successors, (244290), 81108 states have internal predecessors, (244290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:32:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81109 states to 81109 states and 244290 transitions. [2021-02-19 17:32:00,831 INFO L78 Accepts]: Start accepts. Automaton has 81109 states and 244290 transitions. Word has length 25 [2021-02-19 17:32:00,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:32:00,831 INFO L480 AbstractCegarLoop]: Abstraction has 81109 states and 244290 transitions. [2021-02-19 17:32:00,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:32:00,831 INFO L276 IsEmpty]: Start isEmpty. Operand 81109 states and 244290 transitions. [2021-02-19 17:32:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:32:01,187 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:32:01,187 INFO L506 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:32:01,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21876,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:32:01,387 INFO L428 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:32:01,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:32:01,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1812151099, now seen corresponding path program 484 times [2021-02-19 17:32:01,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:32:01,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774915506] [2021-02-19 17:32:01,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:32:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:32:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:32:01,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774915506] [2021-02-19 17:32:01,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348576215] [2021-02-19 17:32:01,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:32:01,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:32:01,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:32:01,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 17:32:01,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:32:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:32:01,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:32:01,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-02-19 17:32:01,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991668411] [2021-02-19 17:32:01,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:32:01,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:32:01,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:32:01,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:32:01,585 INFO L87 Difference]: Start difference. First operand 81109 states and 244290 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:32:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:32:02,214 INFO L93 Difference]: Finished difference Result 141566 states and 426101 transitions. [2021-02-19 17:32:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:32:02,215 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:32:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:32:02,518 INFO L225 Difference]: With dead ends: 141566 [2021-02-19 17:32:02,518 INFO L226 Difference]: Without dead ends: 141566 [2021-02-19 17:32:02,518 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:32:02,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141566 states. Received shutdown request... [2021-02-19 17:32:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141566 to 133763. [2021-02-19 17:32:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133763 states, 133762 states have (on average 3.0207682301400998) internal successors, (404064), 133762 states have internal predecessors, (404064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:32:05,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21877,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:32:05,162 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 17:32:05,166 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 17:32:05,166 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:32:05 BasicIcfg [2021-02-19 17:32:05,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:32:05,167 INFO L168 Benchmark]: Toolchain (without parser) took 559481.35 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.5 MB in the beginning and 11.8 GB in the end (delta: -11.6 GB). Peak memory consumption was 4.4 GB. Max. memory is 16.0 GB. [2021-02-19 17:32:05,167 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:32:05,167 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.74 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 17:32:05,167 INFO L168 Benchmark]: Boogie Preprocessor took 15.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.6 MB in the end (delta: 797.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 17:32:05,167 INFO L168 Benchmark]: RCFGBuilder took 256.69 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 235.7 MB in the end (delta: -2.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-02-19 17:32:05,167 INFO L168 Benchmark]: TraceAbstraction took 559174.69 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 235.7 MB in the beginning and 11.8 GB in the end (delta: -11.6 GB). Peak memory consumption was 4.4 GB. Max. memory is 16.0 GB. [2021-02-19 17:32:05,167 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.74 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.6 MB in the end (delta: 797.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 256.69 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 235.7 MB in the end (delta: -2.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 559174.69 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 235.7 MB in the beginning and 11.8 GB in the end (delta: -11.6 GB). Peak memory consumption was 4.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 52). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 559.1s, OverallIterations: 488, TraceHistogramMax: 11, AutomataDifference: 134.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10211 SDtfs, 42110 SDslu, 64472 SDs, 0 SdLazy, 75757 SolverSat, 14066 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 31.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21002 GetRequests, 10011 SyntacticMatches, 219 SemanticMatches, 10772 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70189 ImplicationChecksByTransitivity, 75.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=269031occurred in iteration=470, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 158.5s AutomataMinimizationTime, 488 MinimizatonAttempts, 1135321 StatesRemovedByMinimization, 483 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 147.1s InterpolantComputationTime, 20489 NumberOfCodeBlocks, 20485 NumberOfCodeBlocksAsserted, 2174 NumberOfCheckSat, 19516 ConstructedInterpolants, 0 QuantifiedInterpolants, 1841046 SizeOfPredicates, 288 NumberOfNonLiveVariables, 41915 ConjunctsInSsa, 7299 ConjunctsInUnsatCore, 973 InterpolantComputations, 3 PerfectInterpolantSequences, 19136/48208 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown