/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/clever.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:13:24,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:13:24,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:13:24,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:13:24,266 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 [2021-03-10 21:13:24,285 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:13:24,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:13:24,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:13:24,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:13:24,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:13:24,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:13:24,287 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:13:24,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:13:24,287 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:13:24,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:13:24,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:13:24,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:13:24,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:13:24,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:13:24,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:13:24,288 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:13:24,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:13:24,289 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:13:24,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:13:24,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:13:24,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:13:24,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:13:24,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:13:24,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:13:24,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:13:24,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:13:24,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:13:24,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:13:24,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:13:24,291 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:13:24,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:13:24,291 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:13:24,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:13:24,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:13:24,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:13:24,641 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:13:24,642 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:13:24,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl [2021-03-10 21:13:24,643 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl' [2021-03-10 21:13:24,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:13:24,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:13:24,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:13:24,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:13:24,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:13:24,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:24" (1/1) ... [2021-03-10 21:13:24,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:24" (1/1) ... [2021-03-10 21:13:24,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:13:24,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:13:24,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:13:24,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:13:24,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:24" (1/1) ... [2021-03-10 21:13:24,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:24" (1/1) ... [2021-03-10 21:13:24,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:24" (1/1) ... [2021-03-10 21:13:24,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:24" (1/1) ... [2021-03-10 21:13:24,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:24" (1/1) ... [2021-03-10 21:13:24,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:24" (1/1) ... [2021-03-10 21:13:24,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:24" (1/1) ... [2021-03-10 21:13:24,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:13:24,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:13:24,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:13:24,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:13:24,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:24" (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 [2021-03-10 21:13:24,799 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:13:24,799 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:13:24,799 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:13:24,800 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:13:24,800 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:13:24,800 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:13:24,800 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:13:24,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:13:24,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:13:24,801 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:13:24,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:13:24,990 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 21:13:24,992 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:13:24 BoogieIcfgContainer [2021-03-10 21:13:24,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:13:24,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:13:24,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:13:24,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:13:24,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:13:24" (1/2) ... [2021-03-10 21:13:24,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282351a2 and model type clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:13:24, skipping insertion in model container [2021-03-10 21:13:24,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:13:24" (2/2) ... [2021-03-10 21:13:25,000 INFO L111 eAbstractionObserver]: Analyzing ICFG clever.wvr.bpl [2021-03-10 21:13:25,007 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:13:25,008 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:13:25,013 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:13:25,014 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:13:25,082 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 21:13:25,107 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 21:13:25,129 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:13:25,130 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:13:25,130 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:13:25,130 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:13:25,130 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:13:25,130 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:13:25,130 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:13:25,130 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:13:25,136 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 26 transitions, 68 flow [2021-03-10 21:13:25,160 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:25,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:13:25,168 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:25,168 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:25,169 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:25,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1207424972, now seen corresponding path program 1 times [2021-03-10 21:13:25,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:25,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467084462] [2021-03-10 21:13:25,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:25,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467084462] [2021-03-10 21:13:25,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:25,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 21:13:25,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348189912] [2021-03-10 21:13:25,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 21:13:25,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:25,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 21:13:25,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:13:25,329 INFO L87 Difference]: Start difference. First operand has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:25,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:25,349 INFO L93 Difference]: Finished difference Result 99 states and 202 transitions. [2021-03-10 21:13:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 21:13:25,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:25,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:25,358 INFO L225 Difference]: With dead ends: 99 [2021-03-10 21:13:25,358 INFO L226 Difference]: Without dead ends: 92 [2021-03-10 21:13:25,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:13:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-03-10 21:13:25,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-03-10 21:13:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-03-10 21:13:25,390 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 12 [2021-03-10 21:13:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:25,390 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-03-10 21:13:25,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-03-10 21:13:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:25,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:25,392 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:25,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:13:25,392 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:25,393 INFO L82 PathProgramCache]: Analyzing trace with hash -680974379, now seen corresponding path program 1 times [2021-03-10 21:13:25,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:25,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954732829] [2021-03-10 21:13:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:25,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954732829] [2021-03-10 21:13:25,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:25,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:13:25,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735908775] [2021-03-10 21:13:25,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:13:25,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:25,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:13:25,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:13:25,427 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:25,484 INFO L93 Difference]: Finished difference Result 138 states and 284 transitions. [2021-03-10 21:13:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:13:25,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:25,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:25,487 INFO L225 Difference]: With dead ends: 138 [2021-03-10 21:13:25,487 INFO L226 Difference]: Without dead ends: 131 [2021-03-10 21:13:25,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-03-10 21:13:25,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-03-10 21:13:25,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 92 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 189 transitions. [2021-03-10 21:13:25,499 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 189 transitions. Word has length 15 [2021-03-10 21:13:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:25,499 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 189 transitions. [2021-03-10 21:13:25,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 189 transitions. [2021-03-10 21:13:25,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:13:25,500 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:25,500 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:25,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 21:13:25,500 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:25,501 INFO L82 PathProgramCache]: Analyzing trace with hash -606254835, now seen corresponding path program 2 times [2021-03-10 21:13:25,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:25,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919502990] [2021-03-10 21:13:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:25,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919502990] [2021-03-10 21:13:25,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090482052] [2021-03-10 21:13:25,552 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 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 [2021-03-10 21:13:25,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:25,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:25,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 21:13:25,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:25,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:25,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-03-10 21:13:25,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575385308] [2021-03-10 21:13:25,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:13:25,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:25,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:13:25,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:13:25,656 INFO L87 Difference]: Start difference. First operand 93 states and 189 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-03-10 21:13:25,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:25,716 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-03-10 21:13:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:13:25,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 15 [2021-03-10 21:13:25,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:25,717 INFO L225 Difference]: With dead ends: 139 [2021-03-10 21:13:25,718 INFO L226 Difference]: Without dead ends: 139 [2021-03-10 21:13:25,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:13:25,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-03-10 21:13:25,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 101. [2021-03-10 21:13:25,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-03-10 21:13:25,727 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 15 [2021-03-10 21:13:25,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:25,728 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-03-10 21:13:25,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-03-10 21:13:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-03-10 21:13:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:13:25,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:25,729 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:25,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-10 21:13:25,943 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:25,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:25,944 INFO L82 PathProgramCache]: Analyzing trace with hash 554535225, now seen corresponding path program 1 times [2021-03-10 21:13:25,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:25,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185772755] [2021-03-10 21:13:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:26,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185772755] [2021-03-10 21:13:26,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073659470] [2021-03-10 21:13:26,171 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) [2021-03-10 21:13:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:26,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:13:26,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:26,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:26,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:13:26,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952209425] [2021-03-10 21:13:26,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:13:26,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:26,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:13:26,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:26,365 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-03-10 21:13:26,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:26,586 INFO L93 Difference]: Finished difference Result 174 states and 366 transitions. [2021-03-10 21:13:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:26,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 19 [2021-03-10 21:13:26,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:26,588 INFO L225 Difference]: With dead ends: 174 [2021-03-10 21:13:26,588 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 21:13:26,588 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:13:26,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 21:13:26,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2021-03-10 21:13:26,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1652173913043478) internal successors, (249), 115 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:26,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 249 transitions. [2021-03-10 21:13:26,598 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 249 transitions. Word has length 19 [2021-03-10 21:13:26,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:26,598 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 249 transitions. [2021-03-10 21:13:26,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-03-10 21:13:26,599 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 249 transitions. [2021-03-10 21:13:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:13:26,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:26,600 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:26,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:26,815 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:26,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1442580746, now seen corresponding path program 1 times [2021-03-10 21:13:26,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:26,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982485883] [2021-03-10 21:13:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:26,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982485883] [2021-03-10 21:13:26,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:13:26,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:13:26,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379067830] [2021-03-10 21:13:26,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:13:26,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:26,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:13:26,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:26,850 INFO L87 Difference]: Start difference. First operand 116 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2021-03-10 21:13:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:26,872 INFO L93 Difference]: Finished difference Result 139 states and 299 transitions. [2021-03-10 21:13:26,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:13:26,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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 19 [2021-03-10 21:13:26,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:26,874 INFO L225 Difference]: With dead ends: 139 [2021-03-10 21:13:26,874 INFO L226 Difference]: Without dead ends: 139 [2021-03-10 21:13:26,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:13:26,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-03-10 21:13:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2021-03-10 21:13:26,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1610169491525424) internal successors, (255), 118 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:26,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 255 transitions. [2021-03-10 21:13:26,883 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 255 transitions. Word has length 19 [2021-03-10 21:13:26,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:26,884 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 255 transitions. [2021-03-10 21:13:26,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2021-03-10 21:13:26,884 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 255 transitions. [2021-03-10 21:13:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:13:26,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:26,885 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:26,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 21:13:26,885 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:26,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1722529490, now seen corresponding path program 2 times [2021-03-10 21:13:26,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:26,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501347326] [2021-03-10 21:13:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:26,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501347326] [2021-03-10 21:13:26,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953002113] [2021-03-10 21:13:26,931 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:26,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:26,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:26,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:13:26,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:27,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:27,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:13:27,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945831452] [2021-03-10 21:13:27,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:13:27,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:27,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:13:27,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:13:27,075 INFO L87 Difference]: Start difference. First operand 119 states and 255 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-03-10 21:13:27,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:27,168 INFO L93 Difference]: Finished difference Result 323 states and 674 transitions. [2021-03-10 21:13:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:27,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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 [2021-03-10 21:13:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:27,172 INFO L225 Difference]: With dead ends: 323 [2021-03-10 21:13:27,172 INFO L226 Difference]: Without dead ends: 323 [2021-03-10 21:13:27,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:27,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-03-10 21:13:27,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 214. [2021-03-10 21:13:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2816901408450705) internal successors, (486), 213 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:27,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 486 transitions. [2021-03-10 21:13:27,183 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 486 transitions. Word has length 22 [2021-03-10 21:13:27,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:27,183 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 486 transitions. [2021-03-10 21:13:27,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-03-10 21:13:27,184 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 486 transitions. [2021-03-10 21:13:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:13:27,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:27,185 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:27,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:27,399 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:27,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:27,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1469628671, now seen corresponding path program 1 times [2021-03-10 21:13:27,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:27,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345799168] [2021-03-10 21:13:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:27,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345799168] [2021-03-10 21:13:27,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571699376] [2021-03-10 21:13:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-03-10 21:13:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:27,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:27,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:27,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:27,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-03-10 21:13:27,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397466847] [2021-03-10 21:13:27,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:13:27,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:27,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:13:27,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:27,822 INFO L87 Difference]: Start difference. First operand 214 states and 486 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:28,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:28,223 INFO L93 Difference]: Finished difference Result 526 states and 1173 transitions. [2021-03-10 21:13:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:13:28,224 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:28,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:28,227 INFO L225 Difference]: With dead ends: 526 [2021-03-10 21:13:28,227 INFO L226 Difference]: Without dead ends: 519 [2021-03-10 21:13:28,227 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 402.0ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:13:28,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-03-10 21:13:28,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 379. [2021-03-10 21:13:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.3412698412698414) internal successors, (885), 378 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:28,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 885 transitions. [2021-03-10 21:13:28,242 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 885 transitions. Word has length 22 [2021-03-10 21:13:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:28,242 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 885 transitions. [2021-03-10 21:13:28,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:28,242 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 885 transitions. [2021-03-10 21:13:28,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:13:28,243 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:28,243 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:28,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:28,459 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:28,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:28,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1564569345, now seen corresponding path program 2 times [2021-03-10 21:13:28,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:28,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993517255] [2021-03-10 21:13:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:28,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993517255] [2021-03-10 21:13:28,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371468224] [2021-03-10 21:13:28,596 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:28,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:28,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:13:28,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:28,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:28,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-03-10 21:13:28,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007145704] [2021-03-10 21:13:28,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:13:28,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:28,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:13:28,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:28,796 INFO L87 Difference]: Start difference. First operand 379 states and 885 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:29,176 INFO L93 Difference]: Finished difference Result 636 states and 1439 transitions. [2021-03-10 21:13:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:29,177 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:29,181 INFO L225 Difference]: With dead ends: 636 [2021-03-10 21:13:29,181 INFO L226 Difference]: Without dead ends: 629 [2021-03-10 21:13:29,181 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:13:29,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-03-10 21:13:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 503. [2021-03-10 21:13:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.364541832669323) internal successors, (1187), 502 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1187 transitions. [2021-03-10 21:13:29,198 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1187 transitions. Word has length 22 [2021-03-10 21:13:29,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:29,200 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 1187 transitions. [2021-03-10 21:13:29,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:29,200 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1187 transitions. [2021-03-10 21:13:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:13:29,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:29,202 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:29,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:29,419 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:29,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:29,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1884591873, now seen corresponding path program 3 times [2021-03-10 21:13:29,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:29,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749575061] [2021-03-10 21:13:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:29,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749575061] [2021-03-10 21:13:29,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634109132] [2021-03-10 21:13:29,518 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:29,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:13:29,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:29,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:13:29,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:29,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:29,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-03-10 21:13:29,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194979157] [2021-03-10 21:13:29,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:13:29,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:29,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:13:29,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:29,708 INFO L87 Difference]: Start difference. First operand 503 states and 1187 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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) [2021-03-10 21:13:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:29,981 INFO L93 Difference]: Finished difference Result 772 states and 1773 transitions. [2021-03-10 21:13:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:13:29,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 22 [2021-03-10 21:13:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:29,985 INFO L225 Difference]: With dead ends: 772 [2021-03-10 21:13:29,985 INFO L226 Difference]: Without dead ends: 758 [2021-03-10 21:13:29,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:13:29,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-03-10 21:13:30,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 650. [2021-03-10 21:13:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.391371340523883) internal successors, (1552), 649 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1552 transitions. [2021-03-10 21:13:30,010 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1552 transitions. Word has length 22 [2021-03-10 21:13:30,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:30,010 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 1552 transitions. [2021-03-10 21:13:30,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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) [2021-03-10 21:13:30,011 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1552 transitions. [2021-03-10 21:13:30,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:13:30,013 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:30,013 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:30,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:30,227 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:30,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:30,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1462940773, now seen corresponding path program 4 times [2021-03-10 21:13:30,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:30,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183730355] [2021-03-10 21:13:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:30,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183730355] [2021-03-10 21:13:30,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422623263] [2021-03-10 21:13:30,405 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 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 [2021-03-10 21:13:30,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:30,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:30,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:13:30,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:30,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:30,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-03-10 21:13:30,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332030615] [2021-03-10 21:13:30,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:13:30,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:30,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:13:30,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:30,577 INFO L87 Difference]: Start difference. First operand 650 states and 1552 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:30,854 INFO L93 Difference]: Finished difference Result 760 states and 1794 transitions. [2021-03-10 21:13:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:13:30,855 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:30,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:30,858 INFO L225 Difference]: With dead ends: 760 [2021-03-10 21:13:30,858 INFO L226 Difference]: Without dead ends: 753 [2021-03-10 21:13:30,859 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:13:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-03-10 21:13:30,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 695. [2021-03-10 21:13:30,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.403458213256484) internal successors, (1668), 694 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1668 transitions. [2021-03-10 21:13:30,877 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1668 transitions. Word has length 22 [2021-03-10 21:13:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:30,878 INFO L480 AbstractCegarLoop]: Abstraction has 695 states and 1668 transitions. [2021-03-10 21:13:30,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:30,878 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1668 transitions. [2021-03-10 21:13:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:13:30,880 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:30,880 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:31,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 21:13:31,091 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:31,092 INFO L82 PathProgramCache]: Analyzing trace with hash 402162683, now seen corresponding path program 5 times [2021-03-10 21:13:31,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:31,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119499903] [2021-03-10 21:13:31,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:31,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119499903] [2021-03-10 21:13:31,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146460221] [2021-03-10 21:13:31,229 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:31,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:13:31,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:31,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:13:31,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:31,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:31,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-03-10 21:13:31,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63034929] [2021-03-10 21:13:31,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:13:31,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:31,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:13:31,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:31,402 INFO L87 Difference]: Start difference. First operand 695 states and 1668 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:31,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:31,714 INFO L93 Difference]: Finished difference Result 812 states and 1925 transitions. [2021-03-10 21:13:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:13:31,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:31,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:31,717 INFO L225 Difference]: With dead ends: 812 [2021-03-10 21:13:31,718 INFO L226 Difference]: Without dead ends: 805 [2021-03-10 21:13:31,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:13:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-03-10 21:13:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 745. [2021-03-10 21:13:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.413978494623656) internal successors, (1796), 744 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1796 transitions. [2021-03-10 21:13:31,737 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1796 transitions. Word has length 22 [2021-03-10 21:13:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:31,737 INFO L480 AbstractCegarLoop]: Abstraction has 745 states and 1796 transitions. [2021-03-10 21:13:31,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:31,738 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1796 transitions. [2021-03-10 21:13:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:13:31,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:31,740 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:31,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-10 21:13:31,956 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:31,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1433916551, now seen corresponding path program 6 times [2021-03-10 21:13:31,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:31,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597816701] [2021-03-10 21:13:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:32,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597816701] [2021-03-10 21:13:32,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927815902] [2021-03-10 21:13:32,116 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 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 [2021-03-10 21:13:32,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:13:32,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:32,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:32,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:32,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:32,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:13:32,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916561826] [2021-03-10 21:13:32,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:13:32,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:32,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:13:32,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:32,321 INFO L87 Difference]: Start difference. First operand 745 states and 1796 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:33,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:33,037 INFO L93 Difference]: Finished difference Result 1425 states and 3333 transitions. [2021-03-10 21:13:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:13:33,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:33,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:33,043 INFO L225 Difference]: With dead ends: 1425 [2021-03-10 21:13:33,043 INFO L226 Difference]: Without dead ends: 1411 [2021-03-10 21:13:33,044 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 552.0ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:13:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-03-10 21:13:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1030. [2021-03-10 21:13:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.445092322643343) internal successors, (2516), 1029 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:33,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2516 transitions. [2021-03-10 21:13:33,069 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2516 transitions. Word has length 25 [2021-03-10 21:13:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:33,069 INFO L480 AbstractCegarLoop]: Abstraction has 1030 states and 2516 transitions. [2021-03-10 21:13:33,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2516 transitions. [2021-03-10 21:13:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:13:33,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:33,072 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:33,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:33,287 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:33,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:33,288 INFO L82 PathProgramCache]: Analyzing trace with hash -589865018, now seen corresponding path program 7 times [2021-03-10 21:13:33,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:33,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985356622] [2021-03-10 21:13:33,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:33,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985356622] [2021-03-10 21:13:33,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328888338] [2021-03-10 21:13:33,326 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 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 [2021-03-10 21:13:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:33,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:13:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:33,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:33,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 21:13:33,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617678343] [2021-03-10 21:13:33,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:13:33,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:33,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:13:33,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:13:33,386 INFO L87 Difference]: Start difference. First operand 1030 states and 2516 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-03-10 21:13:33,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:33,440 INFO L93 Difference]: Finished difference Result 1306 states and 3010 transitions. [2021-03-10 21:13:33,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:13:33,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 25 [2021-03-10 21:13:33,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:33,445 INFO L225 Difference]: With dead ends: 1306 [2021-03-10 21:13:33,445 INFO L226 Difference]: Without dead ends: 1303 [2021-03-10 21:13:33,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:33,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-03-10 21:13:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1033. [2021-03-10 21:13:33,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.435077519379845) internal successors, (2513), 1032 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2513 transitions. [2021-03-10 21:13:33,471 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2513 transitions. Word has length 25 [2021-03-10 21:13:33,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:33,471 INFO L480 AbstractCegarLoop]: Abstraction has 1033 states and 2513 transitions. [2021-03-10 21:13:33,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-03-10 21:13:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2513 transitions. [2021-03-10 21:13:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:13:33,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:33,473 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:33,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:33,687 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:33,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1073972118, now seen corresponding path program 8 times [2021-03-10 21:13:33,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:33,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224286166] [2021-03-10 21:13:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:33,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224286166] [2021-03-10 21:13:33,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913345250] [2021-03-10 21:13:33,724 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 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 [2021-03-10 21:13:33,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:33,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:33,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:13:33,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:33,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:33,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 21:13:33,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960831305] [2021-03-10 21:13:33,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:13:33,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:33,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:13:33,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:13:33,796 INFO L87 Difference]: Start difference. First operand 1033 states and 2513 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:33,857 INFO L93 Difference]: Finished difference Result 1948 states and 4632 transitions. [2021-03-10 21:13:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:33,857 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:33,864 INFO L225 Difference]: With dead ends: 1948 [2021-03-10 21:13:33,864 INFO L226 Difference]: Without dead ends: 1948 [2021-03-10 21:13:33,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-03-10 21:13:33,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1621. [2021-03-10 21:13:33,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.504938271604938) internal successors, (4058), 1620 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:33,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4058 transitions. [2021-03-10 21:13:33,902 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4058 transitions. Word has length 25 [2021-03-10 21:13:33,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:33,902 INFO L480 AbstractCegarLoop]: Abstraction has 1621 states and 4058 transitions. [2021-03-10 21:13:33,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:33,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4058 transitions. [2021-03-10 21:13:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:13:33,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:33,905 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:34,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 21:13:34,127 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:34,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:34,127 INFO L82 PathProgramCache]: Analyzing trace with hash -396917486, now seen corresponding path program 9 times [2021-03-10 21:13:34,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:34,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633923773] [2021-03-10 21:13:34,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:34,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633923773] [2021-03-10 21:13:34,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474398557] [2021-03-10 21:13:34,168 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 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 [2021-03-10 21:13:34,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:13:34,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:34,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:13:34,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:34,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:34,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 21:13:34,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970908745] [2021-03-10 21:13:34,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:13:34,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:34,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:13:34,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:13:34,239 INFO L87 Difference]: Start difference. First operand 1621 states and 4058 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:34,297 INFO L93 Difference]: Finished difference Result 1941 states and 4622 transitions. [2021-03-10 21:13:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:13:34,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:34,305 INFO L225 Difference]: With dead ends: 1941 [2021-03-10 21:13:34,305 INFO L226 Difference]: Without dead ends: 1938 [2021-03-10 21:13:34,307 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:34,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-03-10 21:13:34,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1621. [2021-03-10 21:13:34,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.5) internal successors, (4050), 1620 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4050 transitions. [2021-03-10 21:13:34,346 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4050 transitions. Word has length 25 [2021-03-10 21:13:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:34,346 INFO L480 AbstractCegarLoop]: Abstraction has 1621 states and 4050 transitions. [2021-03-10 21:13:34,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:34,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4050 transitions. [2021-03-10 21:13:34,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:13:34,350 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:34,350 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:34,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 21:13:34,571 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2034489942, now seen corresponding path program 10 times [2021-03-10 21:13:34,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:34,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489631657] [2021-03-10 21:13:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:34,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489631657] [2021-03-10 21:13:34,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058014937] [2021-03-10 21:13:34,595 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 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 [2021-03-10 21:13:34,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:34,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:34,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:13:34,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:34,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:34,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:13:34,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101080343] [2021-03-10 21:13:34,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:13:34,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:34,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:13:34,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:13:34,675 INFO L87 Difference]: Start difference. First operand 1621 states and 4050 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:34,756 INFO L93 Difference]: Finished difference Result 1932 states and 4596 transitions. [2021-03-10 21:13:34,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:34,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:34,763 INFO L225 Difference]: With dead ends: 1932 [2021-03-10 21:13:34,763 INFO L226 Difference]: Without dead ends: 1918 [2021-03-10 21:13:34,763 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:34,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-03-10 21:13:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1635. [2021-03-10 21:13:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 2.4871481028151776) internal successors, (4064), 1634 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 4064 transitions. [2021-03-10 21:13:34,801 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 4064 transitions. Word has length 25 [2021-03-10 21:13:34,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:34,802 INFO L480 AbstractCegarLoop]: Abstraction has 1635 states and 4064 transitions. [2021-03-10 21:13:34,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 4064 transitions. [2021-03-10 21:13:34,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:13:34,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:34,805 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:35,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 21:13:35,019 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:35,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:35,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1747780543, now seen corresponding path program 11 times [2021-03-10 21:13:35,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:35,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694696539] [2021-03-10 21:13:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:35,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694696539] [2021-03-10 21:13:35,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186406546] [2021-03-10 21:13:35,215 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 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 [2021-03-10 21:13:35,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:13:35,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:35,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:35,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:35,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:35,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:13:35,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024955959] [2021-03-10 21:13:35,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:13:35,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:35,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:13:35,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:35,399 INFO L87 Difference]: Start difference. First operand 1635 states and 4064 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:36,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:36,034 INFO L93 Difference]: Finished difference Result 2667 states and 6496 transitions. [2021-03-10 21:13:36,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:13:36,035 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:36,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:36,044 INFO L225 Difference]: With dead ends: 2667 [2021-03-10 21:13:36,044 INFO L226 Difference]: Without dead ends: 2634 [2021-03-10 21:13:36,045 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 527.6ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:13:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-03-10 21:13:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2167. [2021-03-10 21:13:36,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.5203139427516157) internal successors, (5459), 2166 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 5459 transitions. [2021-03-10 21:13:36,090 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 5459 transitions. Word has length 25 [2021-03-10 21:13:36,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:36,090 INFO L480 AbstractCegarLoop]: Abstraction has 2167 states and 5459 transitions. [2021-03-10 21:13:36,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:36,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 5459 transitions. [2021-03-10 21:13:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:13:36,094 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:36,094 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:36,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:36,307 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:36,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1345299591, now seen corresponding path program 12 times [2021-03-10 21:13:36,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:36,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277696612] [2021-03-10 21:13:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:36,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277696612] [2021-03-10 21:13:36,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079954910] [2021-03-10 21:13:36,456 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 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 [2021-03-10 21:13:36,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:13:36,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:36,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:36,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:36,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:36,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:36,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:13:36,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566729275] [2021-03-10 21:13:36,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:13:36,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:36,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:13:36,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:36,657 INFO L87 Difference]: Start difference. First operand 2167 states and 5459 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:37,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:37,311 INFO L93 Difference]: Finished difference Result 2799 states and 6877 transitions. [2021-03-10 21:13:37,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:13:37,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:37,320 INFO L225 Difference]: With dead ends: 2799 [2021-03-10 21:13:37,320 INFO L226 Difference]: Without dead ends: 2766 [2021-03-10 21:13:37,321 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:13:37,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-03-10 21:13:37,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2353. [2021-03-10 21:13:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2353 states, 2352 states have (on average 2.5357142857142856) internal successors, (5964), 2352 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 5964 transitions. [2021-03-10 21:13:37,371 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 5964 transitions. Word has length 25 [2021-03-10 21:13:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:37,371 INFO L480 AbstractCegarLoop]: Abstraction has 2353 states and 5964 transitions. [2021-03-10 21:13:37,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 5964 transitions. [2021-03-10 21:13:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:13:37,375 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:37,375 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:37,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 21:13:37,597 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:37,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:37,598 INFO L82 PathProgramCache]: Analyzing trace with hash -2025191615, now seen corresponding path program 13 times [2021-03-10 21:13:37,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:37,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646313182] [2021-03-10 21:13:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:37,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646313182] [2021-03-10 21:13:37,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569883471] [2021-03-10 21:13:37,738 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 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 [2021-03-10 21:13:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:37,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:37,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:37,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:37,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:13:37,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659729397] [2021-03-10 21:13:37,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:13:37,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:37,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:13:37,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:37,987 INFO L87 Difference]: Start difference. First operand 2353 states and 5964 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:38,681 INFO L93 Difference]: Finished difference Result 3085 states and 7606 transitions. [2021-03-10 21:13:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:13:38,682 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:38,691 INFO L225 Difference]: With dead ends: 3085 [2021-03-10 21:13:38,691 INFO L226 Difference]: Without dead ends: 3052 [2021-03-10 21:13:38,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 542.3ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:13:38,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-03-10 21:13:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2653. [2021-03-10 21:13:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2652 states have (on average 2.5448717948717947) internal successors, (6749), 2652 states have internal predecessors, (6749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 6749 transitions. [2021-03-10 21:13:38,744 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 6749 transitions. Word has length 25 [2021-03-10 21:13:38,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:38,744 INFO L480 AbstractCegarLoop]: Abstraction has 2653 states and 6749 transitions. [2021-03-10 21:13:38,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 6749 transitions. [2021-03-10 21:13:38,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:13:38,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:38,748 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:38,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:38,969 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:38,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:38,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1949753153, now seen corresponding path program 14 times [2021-03-10 21:13:38,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:38,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808366249] [2021-03-10 21:13:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:39,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808366249] [2021-03-10 21:13:39,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381783828] [2021-03-10 21:13:39,097 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 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 [2021-03-10 21:13:39,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:39,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:39,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:39,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:39,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:39,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:13:39,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456780436] [2021-03-10 21:13:39,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:13:39,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:39,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:13:39,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:39,272 INFO L87 Difference]: Start difference. First operand 2653 states and 6749 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:39,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:39,875 INFO L93 Difference]: Finished difference Result 3403 states and 8493 transitions. [2021-03-10 21:13:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:13:39,876 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:39,881 INFO L225 Difference]: With dead ends: 3403 [2021-03-10 21:13:39,881 INFO L226 Difference]: Without dead ends: 3367 [2021-03-10 21:13:39,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 470.1ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:13:39,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2021-03-10 21:13:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 2970. [2021-03-10 21:13:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.560794880431122) internal successors, (7603), 2969 states have internal predecessors, (7603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 7603 transitions. [2021-03-10 21:13:39,934 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 7603 transitions. Word has length 25 [2021-03-10 21:13:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:39,934 INFO L480 AbstractCegarLoop]: Abstraction has 2970 states and 7603 transitions. [2021-03-10 21:13:39,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 7603 transitions. [2021-03-10 21:13:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:13:39,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:39,938 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:40,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:40,152 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:40,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1002318503, now seen corresponding path program 15 times [2021-03-10 21:13:40,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:40,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437710837] [2021-03-10 21:13:40,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:40,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437710837] [2021-03-10 21:13:40,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16776169] [2021-03-10 21:13:40,304 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 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 [2021-03-10 21:13:40,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:13:40,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:40,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:40,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:40,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:40,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:13:40,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849178354] [2021-03-10 21:13:40,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:13:40,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:40,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:13:40,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:40,527 INFO L87 Difference]: Start difference. First operand 2970 states and 7603 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:41,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:41,016 INFO L93 Difference]: Finished difference Result 3443 states and 8662 transitions. [2021-03-10 21:13:41,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:13:41,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:41,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:41,021 INFO L225 Difference]: With dead ends: 3443 [2021-03-10 21:13:41,021 INFO L226 Difference]: Without dead ends: 3410 [2021-03-10 21:13:41,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 458.2ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:13:41,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-03-10 21:13:41,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 3167. [2021-03-10 21:13:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 3166 states have (on average 2.5634870499052433) internal successors, (8116), 3166 states have internal predecessors, (8116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 8116 transitions. [2021-03-10 21:13:41,071 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 8116 transitions. Word has length 25 [2021-03-10 21:13:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:41,071 INFO L480 AbstractCegarLoop]: Abstraction has 3167 states and 8116 transitions. [2021-03-10 21:13:41,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 8116 transitions. [2021-03-10 21:13:41,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:13:41,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:41,075 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:41,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 21:13:41,291 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:41,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:41,291 INFO L82 PathProgramCache]: Analyzing trace with hash -58459587, now seen corresponding path program 16 times [2021-03-10 21:13:41,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:41,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576912587] [2021-03-10 21:13:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:41,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576912587] [2021-03-10 21:13:41,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101512922] [2021-03-10 21:13:41,447 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 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 [2021-03-10 21:13:41,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:41,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:41,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:41,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:41,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:41,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:13:41,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959384014] [2021-03-10 21:13:41,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:13:41,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:41,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:13:41,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:41,596 INFO L87 Difference]: Start difference. First operand 3167 states and 8116 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:42,076 INFO L93 Difference]: Finished difference Result 3520 states and 8898 transitions. [2021-03-10 21:13:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:13:42,076 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:42,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:42,083 INFO L225 Difference]: With dead ends: 3520 [2021-03-10 21:13:42,084 INFO L226 Difference]: Without dead ends: 3507 [2021-03-10 21:13:42,084 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:13:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-03-10 21:13:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3303. [2021-03-10 21:13:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.562992125984252) internal successors, (8463), 3302 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 8463 transitions. [2021-03-10 21:13:42,142 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 8463 transitions. Word has length 25 [2021-03-10 21:13:42,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:42,142 INFO L480 AbstractCegarLoop]: Abstraction has 3303 states and 8463 transitions. [2021-03-10 21:13:42,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 8463 transitions. [2021-03-10 21:13:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:13:42,147 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:42,147 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:42,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:42,363 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:42,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1190377043, now seen corresponding path program 17 times [2021-03-10 21:13:42,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:42,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168780245] [2021-03-10 21:13:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:42,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168780245] [2021-03-10 21:13:42,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767962095] [2021-03-10 21:13:42,506 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:42,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:13:42,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:42,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:42,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:42,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:42,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:13:42,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775326958] [2021-03-10 21:13:42,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:13:42,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:42,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:13:42,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:13:42,729 INFO L87 Difference]: Start difference. First operand 3303 states and 8463 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:43,196 INFO L93 Difference]: Finished difference Result 3850 states and 9692 transitions. [2021-03-10 21:13:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:13:43,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:13:43,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:43,204 INFO L225 Difference]: With dead ends: 3850 [2021-03-10 21:13:43,204 INFO L226 Difference]: Without dead ends: 3817 [2021-03-10 21:13:43,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 407.6ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:13:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-03-10 21:13:43,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3492. [2021-03-10 21:13:43,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.5665998281294757) internal successors, (8960), 3491 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:43,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 8960 transitions. [2021-03-10 21:13:43,263 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 8960 transitions. Word has length 25 [2021-03-10 21:13:43,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:43,263 INFO L480 AbstractCegarLoop]: Abstraction has 3492 states and 8960 transitions. [2021-03-10 21:13:43,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 8960 transitions. [2021-03-10 21:13:43,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 21:13:43,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:43,269 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:43,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 21:13:43,490 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:43,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:43,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1196506414, now seen corresponding path program 3 times [2021-03-10 21:13:43,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:43,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290681937] [2021-03-10 21:13:43,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:43,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290681937] [2021-03-10 21:13:43,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205841644] [2021-03-10 21:13:43,599 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 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 [2021-03-10 21:13:43,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:13:43,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:43,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:13:43,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:43,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:43,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:13:43,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880313924] [2021-03-10 21:13:43,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:13:43,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:43,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:13:43,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:13:43,709 INFO L87 Difference]: Start difference. First operand 3492 states and 8960 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:43,931 INFO L93 Difference]: Finished difference Result 3385 states and 8558 transitions. [2021-03-10 21:13:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:13:43,931 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 21:13:43,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:43,936 INFO L225 Difference]: With dead ends: 3385 [2021-03-10 21:13:43,936 INFO L226 Difference]: Without dead ends: 3093 [2021-03-10 21:13:43,936 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:13:43,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-03-10 21:13:43,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 3088. [2021-03-10 21:13:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.557823129251701) internal successors, (7896), 3087 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 7896 transitions. [2021-03-10 21:13:43,985 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 7896 transitions. Word has length 26 [2021-03-10 21:13:43,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:43,985 INFO L480 AbstractCegarLoop]: Abstraction has 3088 states and 7896 transitions. [2021-03-10 21:13:43,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 7896 transitions. [2021-03-10 21:13:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 21:13:44,015 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:44,015 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:44,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 21:13:44,216 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:44,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:44,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1322834441, now seen corresponding path program 18 times [2021-03-10 21:13:44,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:44,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584040406] [2021-03-10 21:13:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:44,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584040406] [2021-03-10 21:13:44,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725334271] [2021-03-10 21:13:44,378 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 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 [2021-03-10 21:13:44,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:13:44,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:44,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:13:44,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:44,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:44,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-10 21:13:44,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323036164] [2021-03-10 21:13:44,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:13:44,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:44,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:13:44,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:13:44,610 INFO L87 Difference]: Start difference. First operand 3088 states and 7896 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:45,380 INFO L93 Difference]: Finished difference Result 3805 states and 9503 transitions. [2021-03-10 21:13:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:13:45,380 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 21:13:45,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:45,384 INFO L225 Difference]: With dead ends: 3805 [2021-03-10 21:13:45,384 INFO L226 Difference]: Without dead ends: 3772 [2021-03-10 21:13:45,384 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 551.1ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:13:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-03-10 21:13:45,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3327. [2021-03-10 21:13:45,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.5673481659651234) internal successors, (8539), 3326 states have internal predecessors, (8539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:45,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8539 transitions. [2021-03-10 21:13:45,433 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8539 transitions. Word has length 28 [2021-03-10 21:13:45,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:45,433 INFO L480 AbstractCegarLoop]: Abstraction has 3327 states and 8539 transitions. [2021-03-10 21:13:45,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:45,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8539 transitions. [2021-03-10 21:13:45,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 21:13:45,437 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:45,437 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:45,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:45,651 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:45,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:45,652 INFO L82 PathProgramCache]: Analyzing trace with hash -35994437, now seen corresponding path program 19 times [2021-03-10 21:13:45,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:45,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175847971] [2021-03-10 21:13:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:45,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175847971] [2021-03-10 21:13:45,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628759785] [2021-03-10 21:13:45,868 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 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 [2021-03-10 21:13:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:45,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:13:45,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:46,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:46,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-10 21:13:46,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959262152] [2021-03-10 21:13:46,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:13:46,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:46,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:13:46,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:13:46,126 INFO L87 Difference]: Start difference. First operand 3327 states and 8539 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:46,848 INFO L93 Difference]: Finished difference Result 3901 states and 9836 transitions. [2021-03-10 21:13:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:13:46,849 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 21:13:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:46,852 INFO L225 Difference]: With dead ends: 3901 [2021-03-10 21:13:46,852 INFO L226 Difference]: Without dead ends: 3868 [2021-03-10 21:13:46,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 618.1ms TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:13:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-03-10 21:13:46,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3566. [2021-03-10 21:13:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3565 states have (on average 2.571669004207574) internal successors, (9168), 3565 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 9168 transitions. [2021-03-10 21:13:46,903 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 9168 transitions. Word has length 28 [2021-03-10 21:13:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:46,904 INFO L480 AbstractCegarLoop]: Abstraction has 3566 states and 9168 transitions. [2021-03-10 21:13:46,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 9168 transitions. [2021-03-10 21:13:46,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 21:13:46,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:46,909 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:47,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 21:13:47,123 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:47,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:47,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1212842193, now seen corresponding path program 20 times [2021-03-10 21:13:47,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:47,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060662771] [2021-03-10 21:13:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:47,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060662771] [2021-03-10 21:13:47,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400679993] [2021-03-10 21:13:47,314 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 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 [2021-03-10 21:13:47,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:47,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:47,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:13:47,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:47,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:47,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-03-10 21:13:47,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320742316] [2021-03-10 21:13:47,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:13:47,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:47,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:13:47,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:13:47,579 INFO L87 Difference]: Start difference. First operand 3566 states and 9168 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:48,448 INFO L93 Difference]: Finished difference Result 4372 states and 10996 transitions. [2021-03-10 21:13:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:13:48,448 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 21:13:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:48,452 INFO L225 Difference]: With dead ends: 4372 [2021-03-10 21:13:48,452 INFO L226 Difference]: Without dead ends: 4339 [2021-03-10 21:13:48,452 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 669.7ms TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:13:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-03-10 21:13:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 3961. [2021-03-10 21:13:48,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3961 states, 3960 states have (on average 2.5717171717171716) internal successors, (10184), 3960 states have internal predecessors, (10184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:48,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 10184 transitions. [2021-03-10 21:13:48,502 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 10184 transitions. Word has length 28 [2021-03-10 21:13:48,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:48,502 INFO L480 AbstractCegarLoop]: Abstraction has 3961 states and 10184 transitions. [2021-03-10 21:13:48,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 10184 transitions. [2021-03-10 21:13:48,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:13:48,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:48,508 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:48,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:48,723 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:48,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:48,724 INFO L82 PathProgramCache]: Analyzing trace with hash -257747651, now seen corresponding path program 4 times [2021-03-10 21:13:48,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:48,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061597885] [2021-03-10 21:13:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:48,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061597885] [2021-03-10 21:13:48,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197570915] [2021-03-10 21:13:48,767 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:48,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:48,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:48,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:13:48,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:48,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:48,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:13:48,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110467788] [2021-03-10 21:13:48,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:13:48,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:48,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:13:48,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:48,852 INFO L87 Difference]: Start difference. First operand 3961 states and 10184 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-03-10 21:13:48,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:48,951 INFO L93 Difference]: Finished difference Result 4649 states and 11665 transitions. [2021-03-10 21:13:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:13:48,951 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 29 [2021-03-10 21:13:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:48,954 INFO L225 Difference]: With dead ends: 4649 [2021-03-10 21:13:48,954 INFO L226 Difference]: Without dead ends: 4649 [2021-03-10 21:13:48,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2021-03-10 21:13:48,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 4178. [2021-03-10 21:13:48,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.573617428776634) internal successors, (10750), 4177 states have internal predecessors, (10750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 10750 transitions. [2021-03-10 21:13:49,002 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 10750 transitions. Word has length 29 [2021-03-10 21:13:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:49,002 INFO L480 AbstractCegarLoop]: Abstraction has 4178 states and 10750 transitions. [2021-03-10 21:13:49,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-03-10 21:13:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 10750 transitions. [2021-03-10 21:13:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:13:49,008 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:49,008 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:49,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 21:13:49,223 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:49,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2058011506, now seen corresponding path program 21 times [2021-03-10 21:13:49,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:49,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639510879] [2021-03-10 21:13:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:49,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639510879] [2021-03-10 21:13:49,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476408763] [2021-03-10 21:13:49,289 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:13:49,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:13:49,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:49,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 21:13:49,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:49,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:49,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-03-10 21:13:49,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640156537] [2021-03-10 21:13:49,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:13:49,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:49,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:13:49,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:49,375 INFO L87 Difference]: Start difference. First operand 4178 states and 10750 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:49,459 INFO L93 Difference]: Finished difference Result 3822 states and 9413 transitions. [2021-03-10 21:13:49,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:13:49,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 21:13:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:49,467 INFO L225 Difference]: With dead ends: 3822 [2021-03-10 21:13:49,467 INFO L226 Difference]: Without dead ends: 3822 [2021-03-10 21:13:49,468 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:13:49,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-03-10 21:13:49,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3081. [2021-03-10 21:13:49,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 2.523701298701299) internal successors, (7773), 3080 states have internal predecessors, (7773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 7773 transitions. [2021-03-10 21:13:49,510 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 7773 transitions. Word has length 29 [2021-03-10 21:13:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:49,510 INFO L480 AbstractCegarLoop]: Abstraction has 3081 states and 7773 transitions. [2021-03-10 21:13:49,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 7773 transitions. [2021-03-10 21:13:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:13:49,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:49,513 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:49,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 21:13:49,727 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:49,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:49,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1837908011, now seen corresponding path program 22 times [2021-03-10 21:13:49,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:49,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617134179] [2021-03-10 21:13:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:49,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617134179] [2021-03-10 21:13:49,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582396464] [2021-03-10 21:13:49,755 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:49,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:49,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:49,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:13:49,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:49,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:49,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:13:49,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987501094] [2021-03-10 21:13:49,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:13:49,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:49,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:13:49,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:13:49,819 INFO L87 Difference]: Start difference. First operand 3081 states and 7773 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-03-10 21:13:49,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:49,886 INFO L93 Difference]: Finished difference Result 3755 states and 9365 transitions. [2021-03-10 21:13:49,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:49,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 29 [2021-03-10 21:13:49,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:49,890 INFO L225 Difference]: With dead ends: 3755 [2021-03-10 21:13:49,890 INFO L226 Difference]: Without dead ends: 3743 [2021-03-10 21:13:49,890 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:13:49,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3743 states. [2021-03-10 21:13:49,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3743 to 3644. [2021-03-10 21:13:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 2.4888827889102387) internal successors, (9067), 3643 states have internal predecessors, (9067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 9067 transitions. [2021-03-10 21:13:49,927 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 9067 transitions. Word has length 29 [2021-03-10 21:13:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:49,927 INFO L480 AbstractCegarLoop]: Abstraction has 3644 states and 9067 transitions. [2021-03-10 21:13:49,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-03-10 21:13:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 9067 transitions. [2021-03-10 21:13:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:13:49,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:49,931 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:50,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:50,147 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:50,147 INFO L82 PathProgramCache]: Analyzing trace with hash 432491545, now seen corresponding path program 23 times [2021-03-10 21:13:50,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:50,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660985448] [2021-03-10 21:13:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:50,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660985448] [2021-03-10 21:13:50,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712904581] [2021-03-10 21:13:50,179 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 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 [2021-03-10 21:13:50,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:13:50,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:50,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:13:50,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:50,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:50,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 21:13:50,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575506967] [2021-03-10 21:13:50,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:13:50,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:50,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:13:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:13:50,256 INFO L87 Difference]: Start difference. First operand 3644 states and 9067 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-03-10 21:13:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:50,315 INFO L93 Difference]: Finished difference Result 3731 states and 9053 transitions. [2021-03-10 21:13:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:50,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 29 [2021-03-10 21:13:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:50,320 INFO L225 Difference]: With dead ends: 3731 [2021-03-10 21:13:50,320 INFO L226 Difference]: Without dead ends: 3731 [2021-03-10 21:13:50,320 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:50,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-03-10 21:13:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3636. [2021-03-10 21:13:50,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.4434662998624486) internal successors, (8882), 3635 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 8882 transitions. [2021-03-10 21:13:50,368 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 8882 transitions. Word has length 29 [2021-03-10 21:13:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:50,368 INFO L480 AbstractCegarLoop]: Abstraction has 3636 states and 8882 transitions. [2021-03-10 21:13:50,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-03-10 21:13:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 8882 transitions. [2021-03-10 21:13:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:13:50,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:50,372 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:50,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:50,587 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:50,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1962584287, now seen corresponding path program 24 times [2021-03-10 21:13:50,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:50,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602960496] [2021-03-10 21:13:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:50,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602960496] [2021-03-10 21:13:50,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988148008] [2021-03-10 21:13:50,621 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 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 [2021-03-10 21:13:50,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:13:50,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:50,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:13:50,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:50,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:50,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 21:13:50,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945400773] [2021-03-10 21:13:50,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:13:50,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:50,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:13:50,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:13:50,683 INFO L87 Difference]: Start difference. First operand 3636 states and 8882 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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) [2021-03-10 21:13:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:50,736 INFO L93 Difference]: Finished difference Result 3810 states and 9235 transitions. [2021-03-10 21:13:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:13:50,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 29 [2021-03-10 21:13:50,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:50,740 INFO L225 Difference]: With dead ends: 3810 [2021-03-10 21:13:50,740 INFO L226 Difference]: Without dead ends: 3808 [2021-03-10 21:13:50,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:13:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2021-03-10 21:13:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3714. [2021-03-10 21:13:50,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.4368435227578775) internal successors, (9048), 3713 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 9048 transitions. [2021-03-10 21:13:50,775 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 9048 transitions. Word has length 29 [2021-03-10 21:13:50,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:50,775 INFO L480 AbstractCegarLoop]: Abstraction has 3714 states and 9048 transitions. [2021-03-10 21:13:50,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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) [2021-03-10 21:13:50,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 9048 transitions. [2021-03-10 21:13:50,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:13:50,779 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:50,779 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:50,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-03-10 21:13:50,989 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:50,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:50,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1927015269, now seen corresponding path program 25 times [2021-03-10 21:13:50,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:50,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562437420] [2021-03-10 21:13:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:51,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562437420] [2021-03-10 21:13:51,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199065987] [2021-03-10 21:13:51,010 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 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 [2021-03-10 21:13:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:51,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:13:51,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:13:51,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:51,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 21:13:51,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270074740] [2021-03-10 21:13:51,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:13:51,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:51,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:13:51,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:13:51,094 INFO L87 Difference]: Start difference. First operand 3714 states and 9048 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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) [2021-03-10 21:13:51,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:51,149 INFO L93 Difference]: Finished difference Result 3976 states and 9563 transitions. [2021-03-10 21:13:51,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:51,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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 29 [2021-03-10 21:13:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:51,152 INFO L225 Difference]: With dead ends: 3976 [2021-03-10 21:13:51,152 INFO L226 Difference]: Without dead ends: 3973 [2021-03-10 21:13:51,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:13:51,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2021-03-10 21:13:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3873. [2021-03-10 21:13:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3872 states have (on average 2.424586776859504) internal successors, (9388), 3872 states have internal predecessors, (9388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 9388 transitions. [2021-03-10 21:13:51,212 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 9388 transitions. Word has length 29 [2021-03-10 21:13:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:51,212 INFO L480 AbstractCegarLoop]: Abstraction has 3873 states and 9388 transitions. [2021-03-10 21:13:51,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 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) [2021-03-10 21:13:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 9388 transitions. [2021-03-10 21:13:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 21:13:51,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:51,215 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:51,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:51,418 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:51,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:51,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1902637985, now seen corresponding path program 26 times [2021-03-10 21:13:51,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:51,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548313064] [2021-03-10 21:13:51,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:51,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548313064] [2021-03-10 21:13:51,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913520845] [2021-03-10 21:13:51,440 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 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 [2021-03-10 21:13:51,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:51,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:51,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:13:51,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:51,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:51,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-10 21:13:51,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130903494] [2021-03-10 21:13:51,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:13:51,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:51,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:13:51,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:13:51,514 INFO L87 Difference]: Start difference. First operand 3873 states and 9388 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-03-10 21:13:51,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:51,594 INFO L93 Difference]: Finished difference Result 3970 states and 9396 transitions. [2021-03-10 21:13:51,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:13:51,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 29 [2021-03-10 21:13:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:51,597 INFO L225 Difference]: With dead ends: 3970 [2021-03-10 21:13:51,597 INFO L226 Difference]: Without dead ends: 3967 [2021-03-10 21:13:51,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:13:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-03-10 21:13:51,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 3722. [2021-03-10 21:13:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 2.3931738779897875) internal successors, (8905), 3721 states have internal predecessors, (8905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:51,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 8905 transitions. [2021-03-10 21:13:51,627 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 8905 transitions. Word has length 29 [2021-03-10 21:13:51,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:51,627 INFO L480 AbstractCegarLoop]: Abstraction has 3722 states and 8905 transitions. [2021-03-10 21:13:51,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-03-10 21:13:51,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 8905 transitions. [2021-03-10 21:13:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 21:13:51,632 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:51,632 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:51,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 21:13:51,839 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:51,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:51,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1685054023, now seen corresponding path program 27 times [2021-03-10 21:13:51,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:51,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759786762] [2021-03-10 21:13:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:52,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759786762] [2021-03-10 21:13:52,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929724390] [2021-03-10 21:13:52,003 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 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 [2021-03-10 21:13:52,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:13:52,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:52,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:13:52,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:52,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:52,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:13:52,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977437395] [2021-03-10 21:13:52,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:13:52,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:52,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:13:52,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:13:52,268 INFO L87 Difference]: Start difference. First operand 3722 states and 8905 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:53,432 INFO L93 Difference]: Finished difference Result 4929 states and 11573 transitions. [2021-03-10 21:13:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:13:53,432 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 21:13:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:53,438 INFO L225 Difference]: With dead ends: 4929 [2021-03-10 21:13:53,438 INFO L226 Difference]: Without dead ends: 4855 [2021-03-10 21:13:53,438 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 943.9ms TimeCoverageRelationStatistics Valid=257, Invalid=2193, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:13:53,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2021-03-10 21:13:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 4204. [2021-03-10 21:13:53,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4204 states, 4203 states have (on average 2.3925767309064954) internal successors, (10056), 4203 states have internal predecessors, (10056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:53,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 10056 transitions. [2021-03-10 21:13:53,489 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 10056 transitions. Word has length 31 [2021-03-10 21:13:53,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:53,489 INFO L480 AbstractCegarLoop]: Abstraction has 4204 states and 10056 transitions. [2021-03-10 21:13:53,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:53,490 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 10056 transitions. [2021-03-10 21:13:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 21:13:53,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:53,494 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:53,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 21:13:53,705 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1536626305, now seen corresponding path program 28 times [2021-03-10 21:13:53,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:53,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146302505] [2021-03-10 21:13:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:53,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146302505] [2021-03-10 21:13:53,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035389531] [2021-03-10 21:13:53,858 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 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 [2021-03-10 21:13:53,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:13:53,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:53,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:13:53,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:54,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:54,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:13:54,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525851702] [2021-03-10 21:13:54,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:13:54,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:54,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:13:54,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:13:54,115 INFO L87 Difference]: Start difference. First operand 4204 states and 10056 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:55,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:55,091 INFO L93 Difference]: Finished difference Result 5234 states and 12282 transitions. [2021-03-10 21:13:55,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:13:55,091 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 21:13:55,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:55,096 INFO L225 Difference]: With dead ends: 5234 [2021-03-10 21:13:55,096 INFO L226 Difference]: Without dead ends: 5194 [2021-03-10 21:13:55,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 773.7ms TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:13:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-03-10 21:13:55,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4469. [2021-03-10 21:13:55,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4469 states, 4468 states have (on average 2.3983885407341092) internal successors, (10716), 4468 states have internal predecessors, (10716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 10716 transitions. [2021-03-10 21:13:55,135 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 10716 transitions. Word has length 31 [2021-03-10 21:13:55,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:55,135 INFO L480 AbstractCegarLoop]: Abstraction has 4469 states and 10716 transitions. [2021-03-10 21:13:55,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:55,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 10716 transitions. [2021-03-10 21:13:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 21:13:55,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:55,139 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:55,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 21:13:55,340 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:55,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1216603777, now seen corresponding path program 29 times [2021-03-10 21:13:55,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:55,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261156599] [2021-03-10 21:13:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:55,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261156599] [2021-03-10 21:13:55,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234928304] [2021-03-10 21:13:55,471 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 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 [2021-03-10 21:13:55,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:13:55,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:55,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:13:55,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:13:55,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:55,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:13:55,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578615131] [2021-03-10 21:13:55,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:13:55,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:55,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:13:55,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:13:55,742 INFO L87 Difference]: Start difference. First operand 4469 states and 10716 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:56,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:56,904 INFO L93 Difference]: Finished difference Result 5435 states and 12809 transitions. [2021-03-10 21:13:56,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:13:56,905 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 21:13:56,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:56,909 INFO L225 Difference]: With dead ends: 5435 [2021-03-10 21:13:56,910 INFO L226 Difference]: Without dead ends: 5402 [2021-03-10 21:13:56,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 926.0ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:13:56,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-03-10 21:13:56,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 4799. [2021-03-10 21:13:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 2.4022509378907877) internal successors, (11526), 4798 states have internal predecessors, (11526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 11526 transitions. [2021-03-10 21:13:56,974 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 11526 transitions. Word has length 31 [2021-03-10 21:13:56,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:56,974 INFO L480 AbstractCegarLoop]: Abstraction has 4799 states and 11526 transitions. [2021-03-10 21:13:56,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 11526 transitions. [2021-03-10 21:13:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 21:13:56,978 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:56,978 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:57,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 21:13:57,191 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:57,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:57,191 INFO L82 PathProgramCache]: Analyzing trace with hash 269169127, now seen corresponding path program 30 times [2021-03-10 21:13:57,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:57,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738400044] [2021-03-10 21:13:57,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:13:57,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738400044] [2021-03-10 21:13:57,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161972824] [2021-03-10 21:13:57,335 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 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 [2021-03-10 21:13:57,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:13:57,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:57,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 21:13:57,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:57,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:57,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 21:13:57,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853053740] [2021-03-10 21:13:57,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:13:57,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:57,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:13:57,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:13:57,585 INFO L87 Difference]: Start difference. First operand 4799 states and 11526 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:58,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:58,480 INFO L93 Difference]: Finished difference Result 5530 states and 13106 transitions. [2021-03-10 21:13:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:13:58,481 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 21:13:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:58,487 INFO L225 Difference]: With dead ends: 5530 [2021-03-10 21:13:58,487 INFO L226 Difference]: Without dead ends: 5486 [2021-03-10 21:13:58,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 733.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:13:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-03-10 21:13:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5052. [2021-03-10 21:13:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 5051 states have (on average 2.404474361512572) internal successors, (12145), 5051 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 12145 transitions. [2021-03-10 21:13:58,549 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 12145 transitions. Word has length 31 [2021-03-10 21:13:58,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:58,550 INFO L480 AbstractCegarLoop]: Abstraction has 5052 states and 12145 transitions. [2021-03-10 21:13:58,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 12145 transitions. [2021-03-10 21:13:58,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:13:58,553 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:58,553 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:58,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 21:13:58,771 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:58,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:58,771 INFO L82 PathProgramCache]: Analyzing trace with hash 192336266, now seen corresponding path program 31 times [2021-03-10 21:13:58,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:58,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194401509] [2021-03-10 21:13:58,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:58,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194401509] [2021-03-10 21:13:58,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209456190] [2021-03-10 21:13:58,884 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 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 [2021-03-10 21:13:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:58,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:13:59,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:59,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-10 21:13:59,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142895273] [2021-03-10 21:13:59,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:13:59,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:59,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:13:59,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:13:59,122 INFO L87 Difference]: Start difference. First operand 5052 states and 12145 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:59,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:59,474 INFO L93 Difference]: Finished difference Result 5662 states and 13472 transitions. [2021-03-10 21:13:59,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:13:59,475 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:13:59,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:59,480 INFO L225 Difference]: With dead ends: 5662 [2021-03-10 21:13:59,480 INFO L226 Difference]: Without dead ends: 5648 [2021-03-10 21:13:59,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 336.2ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:13:59,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5648 states. [2021-03-10 21:13:59,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5648 to 5352. [2021-03-10 21:13:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 2.4075873668473182) internal successors, (12883), 5351 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 12883 transitions. [2021-03-10 21:13:59,527 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 12883 transitions. Word has length 32 [2021-03-10 21:13:59,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:59,527 INFO L480 AbstractCegarLoop]: Abstraction has 5352 states and 12883 transitions. [2021-03-10 21:13:59,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:59,527 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 12883 transitions. [2021-03-10 21:13:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:13:59,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:59,530 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:59,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 21:13:59,731 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:59,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:59,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1042547118, now seen corresponding path program 32 times [2021-03-10 21:13:59,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:59,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947673690] [2021-03-10 21:13:59,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:59,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947673690] [2021-03-10 21:13:59,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999297712] [2021-03-10 21:13:59,855 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:59,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:13:59,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:59,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:13:59,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:00,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:00,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-10 21:14:00,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004539234] [2021-03-10 21:14:00,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:14:00,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:00,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:14:00,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:00,055 INFO L87 Difference]: Start difference. First operand 5352 states and 12883 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:00,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:00,462 INFO L93 Difference]: Finished difference Result 5807 states and 13850 transitions. [2021-03-10 21:14:00,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:14:00,463 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:14:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:00,469 INFO L225 Difference]: With dead ends: 5807 [2021-03-10 21:14:00,469 INFO L226 Difference]: Without dead ends: 5793 [2021-03-10 21:14:00,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 401.3ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:14:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5793 states. [2021-03-10 21:14:00,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5793 to 5524. [2021-03-10 21:14:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 2.4110085098678256) internal successors, (13316), 5523 states have internal predecessors, (13316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 13316 transitions. [2021-03-10 21:14:00,551 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 13316 transitions. Word has length 32 [2021-03-10 21:14:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:00,551 INFO L480 AbstractCegarLoop]: Abstraction has 5524 states and 13316 transitions. [2021-03-10 21:14:00,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:00,551 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 13316 transitions. [2021-03-10 21:14:00,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:14:00,556 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:00,556 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:00,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 21:14:00,756 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:00,757 INFO L82 PathProgramCache]: Analyzing trace with hash -785972854, now seen corresponding path program 33 times [2021-03-10 21:14:00,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:00,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803044907] [2021-03-10 21:14:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:00,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803044907] [2021-03-10 21:14:00,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11876905] [2021-03-10 21:14:00,892 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 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 [2021-03-10 21:14:00,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:00,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:00,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:00,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:01,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:01,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:14:01,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934062124] [2021-03-10 21:14:01,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:14:01,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:01,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:14:01,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:01,140 INFO L87 Difference]: Start difference. First operand 5524 states and 13316 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:01,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:01,710 INFO L93 Difference]: Finished difference Result 6674 states and 15890 transitions. [2021-03-10 21:14:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:14:01,711 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:14:01,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:01,717 INFO L225 Difference]: With dead ends: 6674 [2021-03-10 21:14:01,717 INFO L226 Difference]: Without dead ends: 6644 [2021-03-10 21:14:01,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 517.3ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:14:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2021-03-10 21:14:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 5926. [2021-03-10 21:14:01,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 2.416877637130802) internal successors, (14320), 5925 states have internal predecessors, (14320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:01,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 14320 transitions. [2021-03-10 21:14:01,807 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 14320 transitions. Word has length 32 [2021-03-10 21:14:01,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:01,807 INFO L480 AbstractCegarLoop]: Abstraction has 5926 states and 14320 transitions. [2021-03-10 21:14:01,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 14320 transitions. [2021-03-10 21:14:01,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:14:01,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:01,813 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:02,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:02,035 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:02,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1229434194, now seen corresponding path program 34 times [2021-03-10 21:14:02,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:02,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732215650] [2021-03-10 21:14:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:02,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732215650] [2021-03-10 21:14:02,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757475152] [2021-03-10 21:14:02,170 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:14:02,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:02,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:02,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:02,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:02,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:02,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:14:02,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193303483] [2021-03-10 21:14:02,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:14:02,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:02,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:14:02,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:02,400 INFO L87 Difference]: Start difference. First operand 5926 states and 14320 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:02,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:02,769 INFO L93 Difference]: Finished difference Result 7466 states and 17775 transitions. [2021-03-10 21:14:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:14:02,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:14:02,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:02,776 INFO L225 Difference]: With dead ends: 7466 [2021-03-10 21:14:02,776 INFO L226 Difference]: Without dead ends: 7426 [2021-03-10 21:14:02,776 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:14:02,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-03-10 21:14:02,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 6811. [2021-03-10 21:14:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6811 states, 6810 states have (on average 2.4252569750367106) internal successors, (16516), 6810 states have internal predecessors, (16516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6811 states to 6811 states and 16516 transitions. [2021-03-10 21:14:02,884 INFO L78 Accepts]: Start accepts. Automaton has 6811 states and 16516 transitions. Word has length 32 [2021-03-10 21:14:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:02,884 INFO L480 AbstractCegarLoop]: Abstraction has 6811 states and 16516 transitions. [2021-03-10 21:14:02,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 6811 states and 16516 transitions. [2021-03-10 21:14:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:14:02,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:02,888 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:03,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:03,088 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:03,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:03,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1606884228, now seen corresponding path program 35 times [2021-03-10 21:14:03,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:03,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625270140] [2021-03-10 21:14:03,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:03,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625270140] [2021-03-10 21:14:03,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537109214] [2021-03-10 21:14:03,216 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 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 [2021-03-10 21:14:03,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:14:03,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:03,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:03,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:03,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:03,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 21:14:03,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602793410] [2021-03-10 21:14:03,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:14:03,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:03,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:14:03,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:03,414 INFO L87 Difference]: Start difference. First operand 6811 states and 16516 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:03,779 INFO L93 Difference]: Finished difference Result 7186 states and 17309 transitions. [2021-03-10 21:14:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:14:03,780 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:14:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:03,786 INFO L225 Difference]: With dead ends: 7186 [2021-03-10 21:14:03,787 INFO L226 Difference]: Without dead ends: 7172 [2021-03-10 21:14:03,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:14:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7172 states. [2021-03-10 21:14:03,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7172 to 6996. [2021-03-10 21:14:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6996 states, 6995 states have (on average 2.4264474624731953) internal successors, (16973), 6995 states have internal predecessors, (16973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 16973 transitions. [2021-03-10 21:14:03,859 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 16973 transitions. Word has length 32 [2021-03-10 21:14:03,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:03,859 INFO L480 AbstractCegarLoop]: Abstraction has 6996 states and 16973 transitions. [2021-03-10 21:14:03,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:03,859 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 16973 transitions. [2021-03-10 21:14:03,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:14:03,864 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:03,864 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:04,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:04,065 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:04,065 INFO L82 PathProgramCache]: Analyzing trace with hash 665097084, now seen corresponding path program 36 times [2021-03-10 21:14:04,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:04,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633627519] [2021-03-10 21:14:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:04,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633627519] [2021-03-10 21:14:04,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51867153] [2021-03-10 21:14:04,180 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 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 [2021-03-10 21:14:04,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:14:04,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:04,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:04,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:04,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:04,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:14:04,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373154149] [2021-03-10 21:14:04,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:14:04,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:04,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:14:04,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:04,369 INFO L87 Difference]: Start difference. First operand 6996 states and 16973 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:04,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:04,817 INFO L93 Difference]: Finished difference Result 8381 states and 20098 transitions. [2021-03-10 21:14:04,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:14:04,817 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:14:04,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:04,824 INFO L225 Difference]: With dead ends: 8381 [2021-03-10 21:14:04,824 INFO L226 Difference]: Without dead ends: 8341 [2021-03-10 21:14:04,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:14:04,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8341 states. [2021-03-10 21:14:04,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8341 to 7795. [2021-03-10 21:14:04,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7795 states, 7794 states have (on average 2.4280215550423403) internal successors, (18924), 7794 states have internal predecessors, (18924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 18924 transitions. [2021-03-10 21:14:04,920 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 18924 transitions. Word has length 32 [2021-03-10 21:14:04,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:04,920 INFO L480 AbstractCegarLoop]: Abstraction has 7795 states and 18924 transitions. [2021-03-10 21:14:04,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:04,921 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 18924 transitions. [2021-03-10 21:14:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:14:04,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:04,926 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:05,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-03-10 21:14:05,127 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:05,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:05,127 INFO L82 PathProgramCache]: Analyzing trace with hash -781323630, now seen corresponding path program 37 times [2021-03-10 21:14:05,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:05,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666263265] [2021-03-10 21:14:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:05,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666263265] [2021-03-10 21:14:05,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431475340] [2021-03-10 21:14:05,238 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:05,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:05,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:05,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:05,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-10 21:14:05,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057235278] [2021-03-10 21:14:05,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:14:05,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:05,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:14:05,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:05,428 INFO L87 Difference]: Start difference. First operand 7795 states and 18924 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:05,985 INFO L93 Difference]: Finished difference Result 9510 states and 22724 transitions. [2021-03-10 21:14:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:14:05,986 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:14:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:05,994 INFO L225 Difference]: With dead ends: 9510 [2021-03-10 21:14:05,995 INFO L226 Difference]: Without dead ends: 9476 [2021-03-10 21:14:05,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:14:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9476 states. [2021-03-10 21:14:06,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9476 to 8348. [2021-03-10 21:14:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8348 states, 8347 states have (on average 2.434527375104828) internal successors, (20321), 8347 states have internal predecessors, (20321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8348 states to 8348 states and 20321 transitions. [2021-03-10 21:14:06,084 INFO L78 Accepts]: Start accepts. Automaton has 8348 states and 20321 transitions. Word has length 32 [2021-03-10 21:14:06,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:06,084 INFO L480 AbstractCegarLoop]: Abstraction has 8348 states and 20321 transitions. [2021-03-10 21:14:06,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:06,084 INFO L276 IsEmpty]: Start isEmpty. Operand 8348 states and 20321 transitions. [2021-03-10 21:14:06,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:14:06,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:06,089 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:06,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:06,291 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:06,291 INFO L82 PathProgramCache]: Analyzing trace with hash 914060890, now seen corresponding path program 38 times [2021-03-10 21:14:06,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:06,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274627702] [2021-03-10 21:14:06,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:06,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274627702] [2021-03-10 21:14:06,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607946469] [2021-03-10 21:14:06,399 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 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 [2021-03-10 21:14:06,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:06,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:06,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:06,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:06,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:06,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:14:06,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064824056] [2021-03-10 21:14:06,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:14:06,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:06,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:14:06,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:06,617 INFO L87 Difference]: Start difference. First operand 8348 states and 20321 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:07,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:07,073 INFO L93 Difference]: Finished difference Result 9488 states and 22893 transitions. [2021-03-10 21:14:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:14:07,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:14:07,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:07,082 INFO L225 Difference]: With dead ends: 9488 [2021-03-10 21:14:07,082 INFO L226 Difference]: Without dead ends: 9449 [2021-03-10 21:14:07,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 412.6ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:14:07,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2021-03-10 21:14:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 8723. [2021-03-10 21:14:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8723 states, 8722 states have (on average 2.4369410685622563) internal successors, (21255), 8722 states have internal predecessors, (21255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8723 states to 8723 states and 21255 transitions. [2021-03-10 21:14:07,172 INFO L78 Accepts]: Start accepts. Automaton has 8723 states and 21255 transitions. Word has length 32 [2021-03-10 21:14:07,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:07,172 INFO L480 AbstractCegarLoop]: Abstraction has 8723 states and 21255 transitions. [2021-03-10 21:14:07,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 8723 states and 21255 transitions. [2021-03-10 21:14:07,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:14:07,179 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:07,179 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:07,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:07,400 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:07,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:07,401 INFO L82 PathProgramCache]: Analyzing trace with hash 333478102, now seen corresponding path program 39 times [2021-03-10 21:14:07,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:07,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120817294] [2021-03-10 21:14:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:07,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120817294] [2021-03-10 21:14:07,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167212951] [2021-03-10 21:14:07,511 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 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 [2021-03-10 21:14:07,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:07,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:07,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:07,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:07,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:07,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:14:07,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237334547] [2021-03-10 21:14:07,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:14:07,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:07,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:14:07,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:07,721 INFO L87 Difference]: Start difference. First operand 8723 states and 21255 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:08,234 INFO L93 Difference]: Finished difference Result 11530 states and 27803 transitions. [2021-03-10 21:14:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:14:08,234 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:14:08,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:08,245 INFO L225 Difference]: With dead ends: 11530 [2021-03-10 21:14:08,245 INFO L226 Difference]: Without dead ends: 11490 [2021-03-10 21:14:08,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 370.2ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:14:08,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11490 states. [2021-03-10 21:14:08,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11490 to 9431. [2021-03-10 21:14:08,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9431 states, 9430 states have (on average 2.4407211028632028) internal successors, (23016), 9430 states have internal predecessors, (23016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:08,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9431 states to 9431 states and 23016 transitions. [2021-03-10 21:14:08,355 INFO L78 Accepts]: Start accepts. Automaton has 9431 states and 23016 transitions. Word has length 32 [2021-03-10 21:14:08,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:08,355 INFO L480 AbstractCegarLoop]: Abstraction has 9431 states and 23016 transitions. [2021-03-10 21:14:08,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:08,355 INFO L276 IsEmpty]: Start isEmpty. Operand 9431 states and 23016 transitions. [2021-03-10 21:14:08,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:14:08,363 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:08,363 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:08,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-10 21:14:08,579 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:08,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:08,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1184169596, now seen corresponding path program 40 times [2021-03-10 21:14:08,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:08,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912162264] [2021-03-10 21:14:08,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:08,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912162264] [2021-03-10 21:14:08,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048014837] [2021-03-10 21:14:08,696 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 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 [2021-03-10 21:14:08,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:08,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:08,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:08,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:08,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:08,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-03-10 21:14:08,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467793373] [2021-03-10 21:14:08,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:14:08,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:08,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:14:08,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:08,924 INFO L87 Difference]: Start difference. First operand 9431 states and 23016 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:09,269 INFO L93 Difference]: Finished difference Result 10586 states and 25593 transitions. [2021-03-10 21:14:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:14:09,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:14:09,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:09,279 INFO L225 Difference]: With dead ends: 10586 [2021-03-10 21:14:09,279 INFO L226 Difference]: Without dead ends: 10559 [2021-03-10 21:14:09,280 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 364.3ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:09,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-03-10 21:14:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 10133. [2021-03-10 21:14:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10133 states, 10132 states have (on average 2.438709040663245) internal successors, (24709), 10132 states have internal predecessors, (24709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 24709 transitions. [2021-03-10 21:14:09,383 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 24709 transitions. Word has length 32 [2021-03-10 21:14:09,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:09,383 INFO L480 AbstractCegarLoop]: Abstraction has 10133 states and 24709 transitions. [2021-03-10 21:14:09,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 24709 transitions. [2021-03-10 21:14:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:14:09,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:09,390 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:09,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 21:14:09,590 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:09,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:09,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1122464136, now seen corresponding path program 41 times [2021-03-10 21:14:09,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:09,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431908207] [2021-03-10 21:14:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:09,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431908207] [2021-03-10 21:14:09,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424205956] [2021-03-10 21:14:09,702 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:14:09,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:14:09,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:09,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:09,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:09,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:09,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-10 21:14:09,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534058011] [2021-03-10 21:14:09,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:14:09,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:09,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:14:09,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:14:09,926 INFO L87 Difference]: Start difference. First operand 10133 states and 24709 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:10,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:10,261 INFO L93 Difference]: Finished difference Result 11077 states and 26854 transitions. [2021-03-10 21:14:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:14:10,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:14:10,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:10,272 INFO L225 Difference]: With dead ends: 11077 [2021-03-10 21:14:10,272 INFO L226 Difference]: Without dead ends: 11043 [2021-03-10 21:14:10,273 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:14:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2021-03-10 21:14:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10335. [2021-03-10 21:14:10,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10334 states have (on average 2.439713566866654) internal successors, (25212), 10334 states have internal predecessors, (25212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 25212 transitions. [2021-03-10 21:14:10,384 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 25212 transitions. Word has length 32 [2021-03-10 21:14:10,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:10,384 INFO L480 AbstractCegarLoop]: Abstraction has 10335 states and 25212 transitions. [2021-03-10 21:14:10,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:10,384 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 25212 transitions. [2021-03-10 21:14:10,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 21:14:10,391 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:10,391 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:10,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 21:14:10,592 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:10,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:10,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1802356160, now seen corresponding path program 42 times [2021-03-10 21:14:10,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:10,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434210095] [2021-03-10 21:14:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:10,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434210095] [2021-03-10 21:14:10,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205538550] [2021-03-10 21:14:10,696 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:10,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:14:10,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:10,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:14:10,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:10,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:10,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-10 21:14:10,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503028132] [2021-03-10 21:14:10,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:14:10,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:10,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:14:10,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:10,898 INFO L87 Difference]: Start difference. First operand 10335 states and 25212 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:11,277 INFO L93 Difference]: Finished difference Result 11359 states and 27517 transitions. [2021-03-10 21:14:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:14:11,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 21:14:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:11,287 INFO L225 Difference]: With dead ends: 11359 [2021-03-10 21:14:11,288 INFO L226 Difference]: Without dead ends: 11319 [2021-03-10 21:14:11,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:14:11,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11319 states. [2021-03-10 21:14:11,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11319 to 10443. [2021-03-10 21:14:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10443 states, 10442 states have (on average 2.439666730511396) internal successors, (25475), 10442 states have internal predecessors, (25475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10443 states to 10443 states and 25475 transitions. [2021-03-10 21:14:11,397 INFO L78 Accepts]: Start accepts. Automaton has 10443 states and 25475 transitions. Word has length 32 [2021-03-10 21:14:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:11,397 INFO L480 AbstractCegarLoop]: Abstraction has 10443 states and 25475 transitions. [2021-03-10 21:14:11,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:11,397 INFO L276 IsEmpty]: Start isEmpty. Operand 10443 states and 25475 transitions. [2021-03-10 21:14:11,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 21:14:11,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:11,403 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:11,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:11,604 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:11,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:11,604 INFO L82 PathProgramCache]: Analyzing trace with hash -192221343, now seen corresponding path program 5 times [2021-03-10 21:14:11,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:11,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229008621] [2021-03-10 21:14:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-03-10 21:14:11,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229008621] [2021-03-10 21:14:11,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227867938] [2021-03-10 21:14:11,705 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 [2021-03-10 21:14:11,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:14:11,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:11,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:14:11,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-03-10 21:14:11,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:11,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:14:11,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124315008] [2021-03-10 21:14:11,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:14:11,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:11,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:14:11,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:11,846 INFO L87 Difference]: Start difference. First operand 10443 states and 25475 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:12,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:12,181 INFO L93 Difference]: Finished difference Result 10579 states and 25763 transitions. [2021-03-10 21:14:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:12,182 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-03-10 21:14:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:12,197 INFO L225 Difference]: With dead ends: 10579 [2021-03-10 21:14:12,198 INFO L226 Difference]: Without dead ends: 10480 [2021-03-10 21:14:12,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 348.3ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:14:12,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10480 states. [2021-03-10 21:14:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10480 to 10452. [2021-03-10 21:14:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10451 states have (on average 2.4395751602717444) internal successors, (25496), 10451 states have internal predecessors, (25496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:12,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 25496 transitions. [2021-03-10 21:14:12,366 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 25496 transitions. Word has length 33 [2021-03-10 21:14:12,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:12,366 INFO L480 AbstractCegarLoop]: Abstraction has 10452 states and 25496 transitions. [2021-03-10 21:14:12,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:12,367 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 25496 transitions. [2021-03-10 21:14:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:14:12,378 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:12,378 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:12,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:12,600 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:12,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:12,600 INFO L82 PathProgramCache]: Analyzing trace with hash -290320826, now seen corresponding path program 43 times [2021-03-10 21:14:12,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:12,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861405434] [2021-03-10 21:14:12,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:14:12,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861405434] [2021-03-10 21:14:12,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669909011] [2021-03-10 21:14:12,649 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 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 [2021-03-10 21:14:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:12,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:14:12,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:14:12,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:12,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-03-10 21:14:12,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976495433] [2021-03-10 21:14:12,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:12,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:12,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:12,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:12,750 INFO L87 Difference]: Start difference. First operand 10452 states and 25496 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:12,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:12,921 INFO L93 Difference]: Finished difference Result 13175 states and 31451 transitions. [2021-03-10 21:14:12,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:14:12,922 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:14:12,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:12,936 INFO L225 Difference]: With dead ends: 13175 [2021-03-10 21:14:12,936 INFO L226 Difference]: Without dead ends: 13175 [2021-03-10 21:14:12,936 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:14:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13175 states. [2021-03-10 21:14:13,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13175 to 10253. [2021-03-10 21:14:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 10252 states have (on average 2.4039211861100274) internal successors, (24645), 10252 states have internal predecessors, (24645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:13,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 24645 transitions. [2021-03-10 21:14:13,088 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 24645 transitions. Word has length 35 [2021-03-10 21:14:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:13,088 INFO L480 AbstractCegarLoop]: Abstraction has 10253 states and 24645 transitions. [2021-03-10 21:14:13,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 24645 transitions. [2021-03-10 21:14:13,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:14:13,096 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:13,096 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:13,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:13,297 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:13,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:13,297 INFO L82 PathProgramCache]: Analyzing trace with hash 158288654, now seen corresponding path program 44 times [2021-03-10 21:14:13,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:13,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408843988] [2021-03-10 21:14:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:14:13,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408843988] [2021-03-10 21:14:13,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319617498] [2021-03-10 21:14:13,339 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:14:13,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:13,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:13,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:14:13,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:14:13,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:13,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-03-10 21:14:13,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212138974] [2021-03-10 21:14:13,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:14:13,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:13,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:14:13,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:13,459 INFO L87 Difference]: Start difference. First operand 10253 states and 24645 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:13,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:13,616 INFO L93 Difference]: Finished difference Result 9582 states and 22134 transitions. [2021-03-10 21:14:13,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:14:13,617 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:14:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:13,626 INFO L225 Difference]: With dead ends: 9582 [2021-03-10 21:14:13,626 INFO L226 Difference]: Without dead ends: 9546 [2021-03-10 21:14:13,626 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:14:13,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2021-03-10 21:14:13,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8819. [2021-03-10 21:14:13,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 2.325243819460195) internal successors, (20504), 8818 states have internal predecessors, (20504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20504 transitions. [2021-03-10 21:14:13,719 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20504 transitions. Word has length 35 [2021-03-10 21:14:13,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:13,719 INFO L480 AbstractCegarLoop]: Abstraction has 8819 states and 20504 transitions. [2021-03-10 21:14:13,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:13,719 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20504 transitions. [2021-03-10 21:14:13,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:14:13,725 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:13,725 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:13,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:13,926 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:13,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:13,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1330535575, now seen corresponding path program 45 times [2021-03-10 21:14:13,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:13,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058584650] [2021-03-10 21:14:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:13,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058584650] [2021-03-10 21:14:13,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138669768] [2021-03-10 21:14:13,953 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 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 [2021-03-10 21:14:13,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:14:13,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:13,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:14:13,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:14,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:14,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:14:14,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427539071] [2021-03-10 21:14:14,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:14:14,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:14,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:14:14,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:14:14,039 INFO L87 Difference]: Start difference. First operand 8819 states and 20504 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2021-03-10 21:14:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:14,118 INFO L93 Difference]: Finished difference Result 9119 states and 20973 transitions. [2021-03-10 21:14:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 35 [2021-03-10 21:14:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:14,126 INFO L225 Difference]: With dead ends: 9119 [2021-03-10 21:14:14,126 INFO L226 Difference]: Without dead ends: 9116 [2021-03-10 21:14:14,126 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:14,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9116 states. [2021-03-10 21:14:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9116 to 8819. [2021-03-10 21:14:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 2.3236561578589248) internal successors, (20490), 8818 states have internal predecessors, (20490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20490 transitions. [2021-03-10 21:14:14,209 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20490 transitions. Word has length 35 [2021-03-10 21:14:14,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:14,209 INFO L480 AbstractCegarLoop]: Abstraction has 8819 states and 20490 transitions. [2021-03-10 21:14:14,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2021-03-10 21:14:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20490 transitions. [2021-03-10 21:14:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:14:14,216 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:14,216 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:14,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-03-10 21:14:14,416 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:14,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash 587893557, now seen corresponding path program 46 times [2021-03-10 21:14:14,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:14,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783148742] [2021-03-10 21:14:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:14,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783148742] [2021-03-10 21:14:14,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751169764] [2021-03-10 21:14:14,445 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 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 [2021-03-10 21:14:14,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:14,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:14,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:14:14,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:14:14,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:14,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:14:14,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984160465] [2021-03-10 21:14:14,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:14:14,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:14,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:14:14,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:14:14,523 INFO L87 Difference]: Start difference. First operand 8819 states and 20490 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-03-10 21:14:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:14,623 INFO L93 Difference]: Finished difference Result 11397 states and 26274 transitions. [2021-03-10 21:14:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:14,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 35 [2021-03-10 21:14:14,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:14,637 INFO L225 Difference]: With dead ends: 11397 [2021-03-10 21:14:14,638 INFO L226 Difference]: Without dead ends: 11397 [2021-03-10 21:14:14,638 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11397 states. [2021-03-10 21:14:14,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11397 to 10697. [2021-03-10 21:14:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10697 states, 10696 states have (on average 2.343025430067315) internal successors, (25061), 10696 states have internal predecessors, (25061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:14,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 25061 transitions. [2021-03-10 21:14:14,869 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 25061 transitions. Word has length 35 [2021-03-10 21:14:14,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:14,869 INFO L480 AbstractCegarLoop]: Abstraction has 10697 states and 25061 transitions. [2021-03-10 21:14:14,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-03-10 21:14:14,870 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 25061 transitions. [2021-03-10 21:14:14,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:14:14,879 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:14,879 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:15,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:15,100 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:15,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1264948189, now seen corresponding path program 47 times [2021-03-10 21:14:15,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:15,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673678843] [2021-03-10 21:14:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:15,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673678843] [2021-03-10 21:14:15,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446201631] [2021-03-10 21:14:15,130 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 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 [2021-03-10 21:14:15,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:15,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:15,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:14:15,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:14:15,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:15,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:14:15,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371917264] [2021-03-10 21:14:15,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:14:15,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:15,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:14:15,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:14:15,228 INFO L87 Difference]: Start difference. First operand 10697 states and 25061 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-03-10 21:14:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:15,339 INFO L93 Difference]: Finished difference Result 11244 states and 25951 transitions. [2021-03-10 21:14:15,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:15,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 35 [2021-03-10 21:14:15,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:15,354 INFO L225 Difference]: With dead ends: 11244 [2021-03-10 21:14:15,354 INFO L226 Difference]: Without dead ends: 11238 [2021-03-10 21:14:15,355 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:15,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11238 states. [2021-03-10 21:14:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11238 to 9395. [2021-03-10 21:14:15,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 9394 states have (on average 2.3070044709388973) internal successors, (21672), 9394 states have internal predecessors, (21672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 21672 transitions. [2021-03-10 21:14:15,511 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 21672 transitions. Word has length 35 [2021-03-10 21:14:15,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:15,511 INFO L480 AbstractCegarLoop]: Abstraction has 9395 states and 21672 transitions. [2021-03-10 21:14:15,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-03-10 21:14:15,511 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 21672 transitions. [2021-03-10 21:14:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:14:15,517 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:15,517 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:15,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-10 21:14:15,717 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:15,717 INFO L82 PathProgramCache]: Analyzing trace with hash -372624267, now seen corresponding path program 48 times [2021-03-10 21:14:15,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:15,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814001176] [2021-03-10 21:14:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:15,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814001176] [2021-03-10 21:14:15,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363331574] [2021-03-10 21:14:15,751 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 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 [2021-03-10 21:14:15,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:15,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:15,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:14:15,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:15,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:15,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:14:15,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008631378] [2021-03-10 21:14:15,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:14:15,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:15,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:14:15,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:14:15,844 INFO L87 Difference]: Start difference. First operand 9395 states and 21672 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2021-03-10 21:14:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:15,962 INFO L93 Difference]: Finished difference Result 9906 states and 22502 transitions. [2021-03-10 21:14:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:15,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 35 [2021-03-10 21:14:15,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:15,975 INFO L225 Difference]: With dead ends: 9906 [2021-03-10 21:14:15,975 INFO L226 Difference]: Without dead ends: 9894 [2021-03-10 21:14:15,975 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9894 states. [2021-03-10 21:14:16,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9894 to 9398. [2021-03-10 21:14:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 2.2974353517079917) internal successors, (21589), 9397 states have internal predecessors, (21589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21589 transitions. [2021-03-10 21:14:16,111 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21589 transitions. Word has length 35 [2021-03-10 21:14:16,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:16,111 INFO L480 AbstractCegarLoop]: Abstraction has 9398 states and 21589 transitions. [2021-03-10 21:14:16,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2021-03-10 21:14:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21589 transitions. [2021-03-10 21:14:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:14:16,120 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:16,120 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:16,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 21:14:16,341 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:16,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:16,342 INFO L82 PathProgramCache]: Analyzing trace with hash 130843265, now seen corresponding path program 49 times [2021-03-10 21:14:16,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:16,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281623532] [2021-03-10 21:14:16,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:16,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281623532] [2021-03-10 21:14:16,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712037204] [2021-03-10 21:14:16,373 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 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 [2021-03-10 21:14:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:16,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:14:16,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:14:16,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:16,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:14:16,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159849138] [2021-03-10 21:14:16,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:14:16,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:16,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:14:16,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:14:16,453 INFO L87 Difference]: Start difference. First operand 9398 states and 21589 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:16,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:16,562 INFO L93 Difference]: Finished difference Result 10139 states and 22898 transitions. [2021-03-10 21:14:16,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:16,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:14:16,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:16,575 INFO L225 Difference]: With dead ends: 10139 [2021-03-10 21:14:16,575 INFO L226 Difference]: Without dead ends: 10139 [2021-03-10 21:14:16,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:14:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10139 states. [2021-03-10 21:14:16,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10139 to 9398. [2021-03-10 21:14:16,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 2.295200595934873) internal successors, (21568), 9397 states have internal predecessors, (21568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21568 transitions. [2021-03-10 21:14:16,674 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21568 transitions. Word has length 35 [2021-03-10 21:14:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:16,674 INFO L480 AbstractCegarLoop]: Abstraction has 9398 states and 21568 transitions. [2021-03-10 21:14:16,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21568 transitions. [2021-03-10 21:14:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:14:16,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:16,680 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:16,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:16,880 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:16,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:16,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1826378957, now seen corresponding path program 50 times [2021-03-10 21:14:16,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:16,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561789946] [2021-03-10 21:14:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:16,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561789946] [2021-03-10 21:14:16,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545606760] [2021-03-10 21:14:16,907 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 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 [2021-03-10 21:14:16,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:16,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:16,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:14:16,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:17,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:17,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:14:17,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413765392] [2021-03-10 21:14:17,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:14:17,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:17,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:14:17,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:14:17,012 INFO L87 Difference]: Start difference. First operand 9398 states and 21568 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:17,117 INFO L93 Difference]: Finished difference Result 11101 states and 25290 transitions. [2021-03-10 21:14:17,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:17,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:14:17,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:17,131 INFO L225 Difference]: With dead ends: 11101 [2021-03-10 21:14:17,131 INFO L226 Difference]: Without dead ends: 11101 [2021-03-10 21:14:17,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2021-03-10 21:14:17,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 10511. [2021-03-10 21:14:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.312464319695528) internal successors, (24304), 10510 states have internal predecessors, (24304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24304 transitions. [2021-03-10 21:14:17,271 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24304 transitions. Word has length 35 [2021-03-10 21:14:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:17,272 INFO L480 AbstractCegarLoop]: Abstraction has 10511 states and 24304 transitions. [2021-03-10 21:14:17,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24304 transitions. [2021-03-10 21:14:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:14:17,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:17,278 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:17,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-10 21:14:17,479 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:17,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:17,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1149324325, now seen corresponding path program 51 times [2021-03-10 21:14:17,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:17,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787835047] [2021-03-10 21:14:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:17,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787835047] [2021-03-10 21:14:17,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454460888] [2021-03-10 21:14:17,504 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 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 [2021-03-10 21:14:17,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:17,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:17,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:14:17,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:17,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:17,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:14:17,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35285310] [2021-03-10 21:14:17,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:14:17,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:17,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:14:17,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:14:17,580 INFO L87 Difference]: Start difference. First operand 10511 states and 24304 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:17,656 INFO L93 Difference]: Finished difference Result 11074 states and 25227 transitions. [2021-03-10 21:14:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:14:17,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:14:17,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:17,666 INFO L225 Difference]: With dead ends: 11074 [2021-03-10 21:14:17,667 INFO L226 Difference]: Without dead ends: 11071 [2021-03-10 21:14:17,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:14:17,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2021-03-10 21:14:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 10511. [2021-03-10 21:14:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.3117031398667933) internal successors, (24296), 10510 states have internal predecessors, (24296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24296 transitions. [2021-03-10 21:14:17,772 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24296 transitions. Word has length 35 [2021-03-10 21:14:17,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:17,772 INFO L480 AbstractCegarLoop]: Abstraction has 10511 states and 24296 transitions. [2021-03-10 21:14:17,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24296 transitions. [2021-03-10 21:14:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:14:17,778 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:17,778 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:17,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:17,979 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:17,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1508070515, now seen corresponding path program 52 times [2021-03-10 21:14:17,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:17,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896689503] [2021-03-10 21:14:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:18,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896689503] [2021-03-10 21:14:18,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288898108] [2021-03-10 21:14:18,004 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 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 [2021-03-10 21:14:18,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:18,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:14:18,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:14:18,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:18,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:14:18,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77710999] [2021-03-10 21:14:18,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:14:18,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:18,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:14:18,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:14:18,072 INFO L87 Difference]: Start difference. First operand 10511 states and 24296 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:18,157 INFO L93 Difference]: Finished difference Result 11098 states and 25265 transitions. [2021-03-10 21:14:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:14:18,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:14:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:18,167 INFO L225 Difference]: With dead ends: 11098 [2021-03-10 21:14:18,167 INFO L226 Difference]: Without dead ends: 11086 [2021-03-10 21:14:18,167 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:14:18,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11086 states. [2021-03-10 21:14:18,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11086 to 10511. [2021-03-10 21:14:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.3078972407231206) internal successors, (24256), 10510 states have internal predecessors, (24256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24256 transitions. [2021-03-10 21:14:18,271 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24256 transitions. Word has length 35 [2021-03-10 21:14:18,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:18,271 INFO L480 AbstractCegarLoop]: Abstraction has 10511 states and 24256 transitions. [2021-03-10 21:14:18,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24256 transitions. [2021-03-10 21:14:18,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 21:14:18,277 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:18,277 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:18,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-03-10 21:14:18,477 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:18,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:18,478 INFO L82 PathProgramCache]: Analyzing trace with hash 452716695, now seen corresponding path program 53 times [2021-03-10 21:14:18,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:18,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415205859] [2021-03-10 21:14:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:18,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415205859] [2021-03-10 21:14:18,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705458023] [2021-03-10 21:14:18,524 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 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 [2021-03-10 21:14:18,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:14:18,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:18,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:14:18,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:18,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:18,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:14:18,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782991289] [2021-03-10 21:14:18,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:14:18,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:18,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:14:18,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:14:18,595 INFO L87 Difference]: Start difference. First operand 10511 states and 24256 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:18,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:18,705 INFO L93 Difference]: Finished difference Result 11062 states and 25159 transitions. [2021-03-10 21:14:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:14:18,705 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 21:14:18,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:18,715 INFO L225 Difference]: With dead ends: 11062 [2021-03-10 21:14:18,715 INFO L226 Difference]: Without dead ends: 11039 [2021-03-10 21:14:18,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:14:18,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11039 states. [2021-03-10 21:14:18,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11039 to 10526. [2021-03-10 21:14:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10526 states, 10525 states have (on average 2.3065083135391924) internal successors, (24276), 10525 states have internal predecessors, (24276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:18,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10526 states to 10526 states and 24276 transitions. [2021-03-10 21:14:18,825 INFO L78 Accepts]: Start accepts. Automaton has 10526 states and 24276 transitions. Word has length 35 [2021-03-10 21:14:18,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:18,825 INFO L480 AbstractCegarLoop]: Abstraction has 10526 states and 24276 transitions. [2021-03-10 21:14:18,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:18,825 INFO L276 IsEmpty]: Start isEmpty. Operand 10526 states and 24276 transitions. [2021-03-10 21:14:18,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 21:14:18,832 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:18,832 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:19,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:19,032 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:19,032 INFO L82 PathProgramCache]: Analyzing trace with hash 764681878, now seen corresponding path program 6 times [2021-03-10 21:14:19,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:19,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613078217] [2021-03-10 21:14:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:19,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613078217] [2021-03-10 21:14:19,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377391287] [2021-03-10 21:14:19,080 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 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 [2021-03-10 21:14:19,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:14:19,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:19,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:14:19,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:19,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:19,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:14:19,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960629443] [2021-03-10 21:14:19,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:14:19,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:19,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:14:19,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:14:19,171 INFO L87 Difference]: Start difference. First operand 10526 states and 24276 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:19,339 INFO L93 Difference]: Finished difference Result 11977 states and 27126 transitions. [2021-03-10 21:14:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:14:19,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-03-10 21:14:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:19,349 INFO L225 Difference]: With dead ends: 11977 [2021-03-10 21:14:19,349 INFO L226 Difference]: Without dead ends: 11977 [2021-03-10 21:14:19,349 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:14:19,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11977 states. [2021-03-10 21:14:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11977 to 10813. [2021-03-10 21:14:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10813 states, 10812 states have (on average 2.3063263041065483) internal successors, (24936), 10812 states have internal predecessors, (24936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10813 states to 10813 states and 24936 transitions. [2021-03-10 21:14:19,457 INFO L78 Accepts]: Start accepts. Automaton has 10813 states and 24936 transitions. Word has length 36 [2021-03-10 21:14:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:19,457 INFO L480 AbstractCegarLoop]: Abstraction has 10813 states and 24936 transitions. [2021-03-10 21:14:19,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,457 INFO L276 IsEmpty]: Start isEmpty. Operand 10813 states and 24936 transitions. [2021-03-10 21:14:19,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:19,465 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:19,465 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:19,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-03-10 21:14:19,679 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:19,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:19,680 INFO L82 PathProgramCache]: Analyzing trace with hash 871367890, now seen corresponding path program 54 times [2021-03-10 21:14:19,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:19,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197696877] [2021-03-10 21:14:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:19,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197696877] [2021-03-10 21:14:19,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731139709] [2021-03-10 21:14:19,846 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 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 [2021-03-10 21:14:19,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:14:19,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:19,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:19,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:20,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:20,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:14:20,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42713315] [2021-03-10 21:14:20,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:20,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:20,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:20,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:20,133 INFO L87 Difference]: Start difference. First operand 10813 states and 24936 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:20,767 INFO L93 Difference]: Finished difference Result 11896 states and 27360 transitions. [2021-03-10 21:14:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:14:20,768 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:20,779 INFO L225 Difference]: With dead ends: 11896 [2021-03-10 21:14:20,779 INFO L226 Difference]: Without dead ends: 11879 [2021-03-10 21:14:20,779 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 524.7ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:14:20,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11879 states. [2021-03-10 21:14:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11879 to 11426. [2021-03-10 21:14:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11426 states, 11425 states have (on average 2.312910284463895) internal successors, (26425), 11425 states have internal predecessors, (26425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11426 states to 11426 states and 26425 transitions. [2021-03-10 21:14:20,891 INFO L78 Accepts]: Start accepts. Automaton has 11426 states and 26425 transitions. Word has length 38 [2021-03-10 21:14:20,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:20,892 INFO L480 AbstractCegarLoop]: Abstraction has 11426 states and 26425 transitions. [2021-03-10 21:14:20,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:20,892 INFO L276 IsEmpty]: Start isEmpty. Operand 11426 states and 26425 transitions. [2021-03-10 21:14:20,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:20,900 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:20,900 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:21,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:21,100 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:21,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:21,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1331528806, now seen corresponding path program 55 times [2021-03-10 21:14:21,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:21,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293636099] [2021-03-10 21:14:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:21,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293636099] [2021-03-10 21:14:21,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521039119] [2021-03-10 21:14:21,304 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 [2021-03-10 21:14:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:21,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:21,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:21,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:14:21,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431290107] [2021-03-10 21:14:21,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:21,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:21,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:21,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:21,588 INFO L87 Difference]: Start difference. First operand 11426 states and 26425 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:22,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:22,161 INFO L93 Difference]: Finished difference Result 12194 states and 28106 transitions. [2021-03-10 21:14:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:14:22,161 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:22,172 INFO L225 Difference]: With dead ends: 12194 [2021-03-10 21:14:22,172 INFO L226 Difference]: Without dead ends: 12177 [2021-03-10 21:14:22,172 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 562.9ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:14:22,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-03-10 21:14:22,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 11804. [2021-03-10 21:14:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11804 states, 11803 states have (on average 2.3180547318478353) internal successors, (27360), 11803 states have internal predecessors, (27360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11804 states to 11804 states and 27360 transitions. [2021-03-10 21:14:22,283 INFO L78 Accepts]: Start accepts. Automaton has 11804 states and 27360 transitions. Word has length 38 [2021-03-10 21:14:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:22,283 INFO L480 AbstractCegarLoop]: Abstraction has 11804 states and 27360 transitions. [2021-03-10 21:14:22,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 11804 states and 27360 transitions. [2021-03-10 21:14:22,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:22,292 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:22,292 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:22,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-03-10 21:14:22,493 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:22,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:22,493 INFO L82 PathProgramCache]: Analyzing trace with hash 549205202, now seen corresponding path program 56 times [2021-03-10 21:14:22,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:22,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337233403] [2021-03-10 21:14:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:22,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337233403] [2021-03-10 21:14:22,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304318545] [2021-03-10 21:14:22,693 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) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:22,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:22,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:22,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:22,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:22,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:22,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:14:22,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295600531] [2021-03-10 21:14:22,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:22,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:22,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:22,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:22,953 INFO L87 Difference]: Start difference. First operand 11804 states and 27360 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:23,679 INFO L93 Difference]: Finished difference Result 12640 states and 29196 transitions. [2021-03-10 21:14:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:14:23,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:23,691 INFO L225 Difference]: With dead ends: 12640 [2021-03-10 21:14:23,691 INFO L226 Difference]: Without dead ends: 12623 [2021-03-10 21:14:23,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 572.5ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:14:23,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2021-03-10 21:14:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 12181. [2021-03-10 21:14:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12181 states, 12180 states have (on average 2.3230706075533663) internal successors, (28295), 12180 states have internal predecessors, (28295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:23,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 28295 transitions. [2021-03-10 21:14:23,809 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 28295 transitions. Word has length 38 [2021-03-10 21:14:23,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:23,809 INFO L480 AbstractCegarLoop]: Abstraction has 12181 states and 28295 transitions. [2021-03-10 21:14:23,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 28295 transitions. [2021-03-10 21:14:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:23,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:23,817 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:24,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:24,019 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:24,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:24,019 INFO L82 PathProgramCache]: Analyzing trace with hash -888682854, now seen corresponding path program 57 times [2021-03-10 21:14:24,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:24,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985048545] [2021-03-10 21:14:24,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:24,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985048545] [2021-03-10 21:14:24,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067632524] [2021-03-10 21:14:24,260 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 [2021-03-10 21:14:24,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:14:24,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:24,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:24,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:24,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:24,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-03-10 21:14:24,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723898335] [2021-03-10 21:14:24,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:14:24,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:24,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:14:24,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:14:24,585 INFO L87 Difference]: Start difference. First operand 12181 states and 28295 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:25,596 INFO L93 Difference]: Finished difference Result 15043 states and 34569 transitions. [2021-03-10 21:14:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:14:25,597 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:25,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:25,611 INFO L225 Difference]: With dead ends: 15043 [2021-03-10 21:14:25,612 INFO L226 Difference]: Without dead ends: 15009 [2021-03-10 21:14:25,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 825.4ms TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:14:25,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15009 states. [2021-03-10 21:14:25,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15009 to 12800. [2021-03-10 21:14:25,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12800 states, 12799 states have (on average 2.3282287678724902) internal successors, (29799), 12799 states have internal predecessors, (29799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12800 states to 12800 states and 29799 transitions. [2021-03-10 21:14:25,750 INFO L78 Accepts]: Start accepts. Automaton has 12800 states and 29799 transitions. Word has length 38 [2021-03-10 21:14:25,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:25,750 INFO L480 AbstractCegarLoop]: Abstraction has 12800 states and 29799 transitions. [2021-03-10 21:14:25,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:25,750 INFO L276 IsEmpty]: Start isEmpty. Operand 12800 states and 29799 transitions. [2021-03-10 21:14:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:25,757 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:25,758 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:25,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-10 21:14:25,958 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:25,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:25,958 INFO L82 PathProgramCache]: Analyzing trace with hash 754853330, now seen corresponding path program 58 times [2021-03-10 21:14:25,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:25,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779086317] [2021-03-10 21:14:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:26,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779086317] [2021-03-10 21:14:26,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883407503] [2021-03-10 21:14:26,136 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) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:26,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:26,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:26,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:26,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:26,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:26,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 21:14:26,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540520560] [2021-03-10 21:14:26,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:14:26,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:26,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:14:26,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:14:26,434 INFO L87 Difference]: Start difference. First operand 12800 states and 29799 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:26,981 INFO L93 Difference]: Finished difference Result 14047 states and 32541 transitions. [2021-03-10 21:14:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:14:26,982 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:26,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:26,995 INFO L225 Difference]: With dead ends: 14047 [2021-03-10 21:14:26,995 INFO L226 Difference]: Without dead ends: 14013 [2021-03-10 21:14:26,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 530.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:14:27,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14013 states. [2021-03-10 21:14:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14013 to 13526. [2021-03-10 21:14:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13526 states, 13525 states have (on average 2.3326432532347505) internal successors, (31549), 13525 states have internal predecessors, (31549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13526 states to 13526 states and 31549 transitions. [2021-03-10 21:14:27,180 INFO L78 Accepts]: Start accepts. Automaton has 13526 states and 31549 transitions. Word has length 38 [2021-03-10 21:14:27,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:27,180 INFO L480 AbstractCegarLoop]: Abstraction has 13526 states and 31549 transitions. [2021-03-10 21:14:27,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 13526 states and 31549 transitions. [2021-03-10 21:14:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:27,188 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:27,188 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:27,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-10 21:14:27,388 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:27,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:27,388 INFO L82 PathProgramCache]: Analyzing trace with hash 74961306, now seen corresponding path program 59 times [2021-03-10 21:14:27,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:27,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873819598] [2021-03-10 21:14:27,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:27,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873819598] [2021-03-10 21:14:27,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356099199] [2021-03-10 21:14:27,600 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) [2021-03-10 21:14:27,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:14:27,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:27,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:27,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:27,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-03-10 21:14:27,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542772062] [2021-03-10 21:14:27,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:14:27,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:27,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:14:27,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:14:27,981 INFO L87 Difference]: Start difference. First operand 13526 states and 31549 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:28,609 INFO L93 Difference]: Finished difference Result 16913 states and 39161 transitions. [2021-03-10 21:14:28,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:14:28,609 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:28,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:28,626 INFO L225 Difference]: With dead ends: 16913 [2021-03-10 21:14:28,626 INFO L226 Difference]: Without dead ends: 16870 [2021-03-10 21:14:28,626 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 614.5ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:14:28,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16870 states. [2021-03-10 21:14:28,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16870 to 15557. [2021-03-10 21:14:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15557 states, 15556 states have (on average 2.3482257649781433) internal successors, (36529), 15556 states have internal predecessors, (36529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15557 states to 15557 states and 36529 transitions. [2021-03-10 21:14:28,797 INFO L78 Accepts]: Start accepts. Automaton has 15557 states and 36529 transitions. Word has length 38 [2021-03-10 21:14:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:28,797 INFO L480 AbstractCegarLoop]: Abstraction has 15557 states and 36529 transitions. [2021-03-10 21:14:28,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:28,797 INFO L276 IsEmpty]: Start isEmpty. Operand 15557 states and 36529 transitions. [2021-03-10 21:14:28,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:28,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:28,806 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:29,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 21:14:29,011 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:29,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:29,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1894044010, now seen corresponding path program 60 times [2021-03-10 21:14:29,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:29,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469746223] [2021-03-10 21:14:29,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:29,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469746223] [2021-03-10 21:14:29,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73026567] [2021-03-10 21:14:29,164 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 [2021-03-10 21:14:29,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:14:29,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:29,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:29,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:29,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:29,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:14:29,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512133187] [2021-03-10 21:14:29,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:29,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:29,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:29,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:29,422 INFO L87 Difference]: Start difference. First operand 15557 states and 36529 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:30,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:30,149 INFO L93 Difference]: Finished difference Result 16313 states and 38191 transitions. [2021-03-10 21:14:30,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:14:30,149 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:30,168 INFO L225 Difference]: With dead ends: 16313 [2021-03-10 21:14:30,168 INFO L226 Difference]: Without dead ends: 16296 [2021-03-10 21:14:30,168 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 551.6ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:14:30,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-03-10 21:14:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 15947. [2021-03-10 21:14:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15947 states, 15946 states have (on average 2.3511225385676657) internal successors, (37491), 15946 states have internal predecessors, (37491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15947 states to 15947 states and 37491 transitions. [2021-03-10 21:14:30,358 INFO L78 Accepts]: Start accepts. Automaton has 15947 states and 37491 transitions. Word has length 38 [2021-03-10 21:14:30,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:30,358 INFO L480 AbstractCegarLoop]: Abstraction has 15947 states and 37491 transitions. [2021-03-10 21:14:30,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 15947 states and 37491 transitions. [2021-03-10 21:14:30,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:30,368 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:30,368 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:30,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:30,569 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:30,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:30,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1716041940, now seen corresponding path program 61 times [2021-03-10 21:14:30,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:30,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617285750] [2021-03-10 21:14:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:30,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617285750] [2021-03-10 21:14:30,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814560540] [2021-03-10 21:14:30,745 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 [2021-03-10 21:14:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:30,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:30,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:31,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:31,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:14:31,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513609757] [2021-03-10 21:14:31,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:31,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:31,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:31,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:31,005 INFO L87 Difference]: Start difference. First operand 15947 states and 37491 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:31,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:31,626 INFO L93 Difference]: Finished difference Result 16694 states and 39131 transitions. [2021-03-10 21:14:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:14:31,627 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:31,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:31,645 INFO L225 Difference]: With dead ends: 16694 [2021-03-10 21:14:31,646 INFO L226 Difference]: Without dead ends: 16677 [2021-03-10 21:14:31,646 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 530.4ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:14:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16677 states. [2021-03-10 21:14:31,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16677 to 16317. [2021-03-10 21:14:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16317 states, 16316 states have (on average 2.3539470458445697) internal successors, (38407), 16316 states have internal predecessors, (38407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16317 states to 16317 states and 38407 transitions. [2021-03-10 21:14:31,841 INFO L78 Accepts]: Start accepts. Automaton has 16317 states and 38407 transitions. Word has length 38 [2021-03-10 21:14:31,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:31,841 INFO L480 AbstractCegarLoop]: Abstraction has 16317 states and 38407 transitions. [2021-03-10 21:14:31,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand 16317 states and 38407 transitions. [2021-03-10 21:14:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:31,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:31,851 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:32,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:32,052 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:32,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:32,052 INFO L82 PathProgramCache]: Analyzing trace with hash -520054204, now seen corresponding path program 62 times [2021-03-10 21:14:32,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:32,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024814521] [2021-03-10 21:14:32,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:32,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024814521] [2021-03-10 21:14:32,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038688833] [2021-03-10 21:14:32,211 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) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:32,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:32,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:32,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:32,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:32,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:32,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:14:32,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705218152] [2021-03-10 21:14:32,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:32,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:32,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:32,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:32,483 INFO L87 Difference]: Start difference. First operand 16317 states and 38407 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:33,103 INFO L93 Difference]: Finished difference Result 16910 states and 39707 transitions. [2021-03-10 21:14:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:14:33,103 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:33,120 INFO L225 Difference]: With dead ends: 16910 [2021-03-10 21:14:33,120 INFO L226 Difference]: Without dead ends: 16893 [2021-03-10 21:14:33,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 562.4ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:14:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16893 states. [2021-03-10 21:14:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16893 to 16652. [2021-03-10 21:14:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16652 states, 16651 states have (on average 2.3558945408684164) internal successors, (39228), 16651 states have internal predecessors, (39228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16652 states to 16652 states and 39228 transitions. [2021-03-10 21:14:33,291 INFO L78 Accepts]: Start accepts. Automaton has 16652 states and 39228 transitions. Word has length 38 [2021-03-10 21:14:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:33,291 INFO L480 AbstractCegarLoop]: Abstraction has 16652 states and 39228 transitions. [2021-03-10 21:14:33,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 16652 states and 39228 transitions. [2021-03-10 21:14:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:33,300 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:33,300 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:33,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:33,501 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:33,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:33,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1360679804, now seen corresponding path program 63 times [2021-03-10 21:14:33,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:33,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917791808] [2021-03-10 21:14:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:33,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917791808] [2021-03-10 21:14:33,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548747406] [2021-03-10 21:14:33,683 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) [2021-03-10 21:14:33,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:14:33,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:33,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:33,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:34,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:34,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:14:34,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69376174] [2021-03-10 21:14:34,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:14:34,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:34,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:14:34,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:14:34,061 INFO L87 Difference]: Start difference. First operand 16652 states and 39228 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:35,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:35,170 INFO L93 Difference]: Finished difference Result 18935 states and 44264 transitions. [2021-03-10 21:14:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:14:35,170 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:35,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:35,191 INFO L225 Difference]: With dead ends: 18935 [2021-03-10 21:14:35,191 INFO L226 Difference]: Without dead ends: 18918 [2021-03-10 21:14:35,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 818.6ms TimeCoverageRelationStatistics Valid=155, Invalid=1567, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:14:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18918 states. [2021-03-10 21:14:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18918 to 17289. [2021-03-10 21:14:35,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17289 states, 17288 states have (on average 2.3604812586765385) internal successors, (40808), 17288 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) [2021-03-10 21:14:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17289 states to 17289 states and 40808 transitions. [2021-03-10 21:14:35,439 INFO L78 Accepts]: Start accepts. Automaton has 17289 states and 40808 transitions. Word has length 38 [2021-03-10 21:14:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:35,439 INFO L480 AbstractCegarLoop]: Abstraction has 17289 states and 40808 transitions. [2021-03-10 21:14:35,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 17289 states and 40808 transitions. [2021-03-10 21:14:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:35,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:35,451 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:35,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-03-10 21:14:35,655 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:35,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:35,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1566327932, now seen corresponding path program 64 times [2021-03-10 21:14:35,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:35,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208573991] [2021-03-10 21:14:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:35,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208573991] [2021-03-10 21:14:35,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344244812] [2021-03-10 21:14:35,858 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 [2021-03-10 21:14:35,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:35,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:35,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:35,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:36,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:36,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 21:14:36,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719078484] [2021-03-10 21:14:36,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:14:36,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:36,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:14:36,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:14:36,258 INFO L87 Difference]: Start difference. First operand 17289 states and 40808 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:36,894 INFO L93 Difference]: Finished difference Result 17863 states and 42004 transitions. [2021-03-10 21:14:36,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:14:36,895 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:36,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:36,913 INFO L225 Difference]: With dead ends: 17863 [2021-03-10 21:14:36,913 INFO L226 Difference]: Without dead ends: 17829 [2021-03-10 21:14:36,914 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 666.6ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:14:36,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17829 states. [2021-03-10 21:14:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17829 to 17547. [2021-03-10 21:14:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17547 states, 17546 states have (on average 2.358828222956799) internal successors, (41388), 17546 states have internal predecessors, (41388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17547 states to 17547 states and 41388 transitions. [2021-03-10 21:14:37,104 INFO L78 Accepts]: Start accepts. Automaton has 17547 states and 41388 transitions. Word has length 38 [2021-03-10 21:14:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:37,104 INFO L480 AbstractCegarLoop]: Abstraction has 17547 states and 41388 transitions. [2021-03-10 21:14:37,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 17547 states and 41388 transitions. [2021-03-10 21:14:37,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:37,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:37,114 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:37,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:37,315 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:37,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:37,315 INFO L82 PathProgramCache]: Analyzing trace with hash 886435908, now seen corresponding path program 65 times [2021-03-10 21:14:37,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:37,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948432334] [2021-03-10 21:14:37,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:37,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948432334] [2021-03-10 21:14:37,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844980989] [2021-03-10 21:14:37,490 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 [2021-03-10 21:14:37,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:14:37,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:37,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:37,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:37,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:37,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-03-10 21:14:37,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058513024] [2021-03-10 21:14:37,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:14:37,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:37,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:14:37,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:14:37,798 INFO L87 Difference]: Start difference. First operand 17547 states and 41388 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:38,463 INFO L93 Difference]: Finished difference Result 20211 states and 47310 transitions. [2021-03-10 21:14:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:14:38,463 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:38,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:38,484 INFO L225 Difference]: With dead ends: 20211 [2021-03-10 21:14:38,484 INFO L226 Difference]: Without dead ends: 20168 [2021-03-10 21:14:38,484 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 562.0ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:14:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20168 states. [2021-03-10 21:14:38,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20168 to 18863. [2021-03-10 21:14:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18863 states, 18862 states have (on average 2.360089067967342) internal successors, (44516), 18862 states have internal predecessors, (44516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18863 states to 18863 states and 44516 transitions. [2021-03-10 21:14:38,733 INFO L78 Accepts]: Start accepts. Automaton has 18863 states and 44516 transitions. Word has length 38 [2021-03-10 21:14:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:38,733 INFO L480 AbstractCegarLoop]: Abstraction has 18863 states and 44516 transitions. [2021-03-10 21:14:38,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 18863 states and 44516 transitions. [2021-03-10 21:14:38,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:38,743 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:38,744 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:38,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:38,965 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:38,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:38,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1082569408, now seen corresponding path program 66 times [2021-03-10 21:14:38,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:38,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933398456] [2021-03-10 21:14:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:39,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933398456] [2021-03-10 21:14:39,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997607723] [2021-03-10 21:14:39,117 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) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:39,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:14:39,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:39,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:39,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:39,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:14:39,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878852854] [2021-03-10 21:14:39,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:39,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:39,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:39,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:39,403 INFO L87 Difference]: Start difference. First operand 18863 states and 44516 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:40,018 INFO L93 Difference]: Finished difference Result 19446 states and 45799 transitions. [2021-03-10 21:14:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:14:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:40,039 INFO L225 Difference]: With dead ends: 19446 [2021-03-10 21:14:40,039 INFO L226 Difference]: Without dead ends: 19429 [2021-03-10 21:14:40,039 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 563.7ms TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:14:40,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19429 states. [2021-03-10 21:14:40,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19429 to 19214. [2021-03-10 21:14:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19214 states, 19213 states have (on average 2.3614219538853902) internal successors, (45370), 19213 states have internal predecessors, (45370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19214 states to 19214 states and 45370 transitions. [2021-03-10 21:14:40,243 INFO L78 Accepts]: Start accepts. Automaton has 19214 states and 45370 transitions. Word has length 38 [2021-03-10 21:14:40,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:40,243 INFO L480 AbstractCegarLoop]: Abstraction has 19214 states and 45370 transitions. [2021-03-10 21:14:40,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:40,243 INFO L276 IsEmpty]: Start isEmpty. Operand 19214 states and 45370 transitions. [2021-03-10 21:14:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:40,254 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:40,254 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:40,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:40,454 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:40,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:40,454 INFO L82 PathProgramCache]: Analyzing trace with hash -904567338, now seen corresponding path program 67 times [2021-03-10 21:14:40,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:40,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765565040] [2021-03-10 21:14:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:40,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765565040] [2021-03-10 21:14:40,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189372159] [2021-03-10 21:14:40,648 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 [2021-03-10 21:14:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:40,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:40,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:40,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:40,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:14:40,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995634184] [2021-03-10 21:14:40,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:40,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:40,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:40,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:40,950 INFO L87 Difference]: Start difference. First operand 19214 states and 45370 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:41,523 INFO L93 Difference]: Finished difference Result 19790 states and 46635 transitions. [2021-03-10 21:14:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:14:41,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:41,546 INFO L225 Difference]: With dead ends: 19790 [2021-03-10 21:14:41,546 INFO L226 Difference]: Without dead ends: 19773 [2021-03-10 21:14:41,546 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 580.3ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:14:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19773 states. [2021-03-10 21:14:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19773 to 19545. [2021-03-10 21:14:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19545 states, 19544 states have (on average 2.362771182971756) internal successors, (46178), 19544 states have internal predecessors, (46178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19545 states to 19545 states and 46178 transitions. [2021-03-10 21:14:41,824 INFO L78 Accepts]: Start accepts. Automaton has 19545 states and 46178 transitions. Word has length 38 [2021-03-10 21:14:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:41,824 INFO L480 AbstractCegarLoop]: Abstraction has 19545 states and 46178 transitions. [2021-03-10 21:14:41,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:41,825 INFO L276 IsEmpty]: Start isEmpty. Operand 19545 states and 46178 transitions. [2021-03-10 21:14:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:41,836 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:41,837 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:42,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-03-10 21:14:42,037 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1183039526, now seen corresponding path program 68 times [2021-03-10 21:14:42,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:42,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229479290] [2021-03-10 21:14:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:42,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229479290] [2021-03-10 21:14:42,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493191429] [2021-03-10 21:14:42,213 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 [2021-03-10 21:14:42,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:42,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:42,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:42,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:42,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:42,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:14:42,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185678318] [2021-03-10 21:14:42,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:42,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:42,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:42,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:42,485 INFO L87 Difference]: Start difference. First operand 19545 states and 46178 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:43,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:43,070 INFO L93 Difference]: Finished difference Result 20173 states and 47556 transitions. [2021-03-10 21:14:43,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:14:43,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:43,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:43,093 INFO L225 Difference]: With dead ends: 20173 [2021-03-10 21:14:43,094 INFO L226 Difference]: Without dead ends: 20156 [2021-03-10 21:14:43,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 545.8ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:14:43,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20156 states. [2021-03-10 21:14:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20156 to 19862. [2021-03-10 21:14:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19862 states, 19861 states have (on average 2.3641307084235437) internal successors, (46954), 19861 states have internal predecessors, (46954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19862 states to 19862 states and 46954 transitions. [2021-03-10 21:14:43,335 INFO L78 Accepts]: Start accepts. Automaton has 19862 states and 46954 transitions. Word has length 38 [2021-03-10 21:14:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:43,335 INFO L480 AbstractCegarLoop]: Abstraction has 19862 states and 46954 transitions. [2021-03-10 21:14:43,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 19862 states and 46954 transitions. [2021-03-10 21:14:43,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:43,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:43,347 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:43,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:43,547 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:43,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1674039714, now seen corresponding path program 69 times [2021-03-10 21:14:43,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:43,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468244808] [2021-03-10 21:14:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:43,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468244808] [2021-03-10 21:14:43,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678273999] [2021-03-10 21:14:43,699 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 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 [2021-03-10 21:14:43,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:14:43,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:43,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:43,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:43,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:43,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:14:43,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630837824] [2021-03-10 21:14:43,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:43,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:43,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:43,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:43,969 INFO L87 Difference]: Start difference. First operand 19862 states and 46954 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:44,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:44,673 INFO L93 Difference]: Finished difference Result 20811 states and 49049 transitions. [2021-03-10 21:14:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:14:44,674 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:44,695 INFO L225 Difference]: With dead ends: 20811 [2021-03-10 21:14:44,695 INFO L226 Difference]: Without dead ends: 20777 [2021-03-10 21:14:44,695 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 595.0ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:14:44,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20777 states. [2021-03-10 21:14:44,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20777 to 20322. [2021-03-10 21:14:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20322 states, 20321 states have (on average 2.3653855617341666) internal successors, (48067), 20321 states have internal predecessors, (48067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20322 states to 20322 states and 48067 transitions. [2021-03-10 21:14:44,957 INFO L78 Accepts]: Start accepts. Automaton has 20322 states and 48067 transitions. Word has length 38 [2021-03-10 21:14:44,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:44,957 INFO L480 AbstractCegarLoop]: Abstraction has 20322 states and 48067 transitions. [2021-03-10 21:14:44,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 20322 states and 48067 transitions. [2021-03-10 21:14:44,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:44,968 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:44,968 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:45,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:45,170 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:45,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:45,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1657283422, now seen corresponding path program 70 times [2021-03-10 21:14:45,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:45,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141715042] [2021-03-10 21:14:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:45,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141715042] [2021-03-10 21:14:45,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036245622] [2021-03-10 21:14:45,322 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 [2021-03-10 21:14:45,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:45,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:45,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:45,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:45,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:45,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-03-10 21:14:45,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860415660] [2021-03-10 21:14:45,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:14:45,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:45,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:14:45,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:14:45,680 INFO L87 Difference]: Start difference. First operand 20322 states and 48067 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:46,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:46,552 INFO L93 Difference]: Finished difference Result 23109 states and 54288 transitions. [2021-03-10 21:14:46,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:14:46,553 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:46,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:46,576 INFO L225 Difference]: With dead ends: 23109 [2021-03-10 21:14:46,576 INFO L226 Difference]: Without dead ends: 23066 [2021-03-10 21:14:46,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 646.8ms TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:14:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23066 states. [2021-03-10 21:14:46,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23066 to 21748. [2021-03-10 21:14:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21748 states, 21747 states have (on average 2.3661194647537593) internal successors, (51456), 21747 states have internal predecessors, (51456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21748 states to 21748 states and 51456 transitions. [2021-03-10 21:14:46,817 INFO L78 Accepts]: Start accepts. Automaton has 21748 states and 51456 transitions. Word has length 38 [2021-03-10 21:14:46,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:46,817 INFO L480 AbstractCegarLoop]: Abstraction has 21748 states and 51456 transitions. [2021-03-10 21:14:46,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:46,817 INFO L276 IsEmpty]: Start isEmpty. Operand 21748 states and 51456 transitions. [2021-03-10 21:14:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:46,830 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:46,830 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:47,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 21:14:47,031 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:47,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:47,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1558285236, now seen corresponding path program 71 times [2021-03-10 21:14:47,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:47,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794839152] [2021-03-10 21:14:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:47,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794839152] [2021-03-10 21:14:47,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879338450] [2021-03-10 21:14:47,219 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 [2021-03-10 21:14:47,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:14:47,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:47,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:47,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:47,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:47,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 21:14:47,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529371840] [2021-03-10 21:14:47,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:14:47,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:47,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:14:47,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:14:47,593 INFO L87 Difference]: Start difference. First operand 21748 states and 51456 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:48,411 INFO L93 Difference]: Finished difference Result 23617 states and 55513 transitions. [2021-03-10 21:14:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:14:48,412 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:48,436 INFO L225 Difference]: With dead ends: 23617 [2021-03-10 21:14:48,436 INFO L226 Difference]: Without dead ends: 23583 [2021-03-10 21:14:48,437 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 767.0ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:14:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23583 states. [2021-03-10 21:14:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23583 to 22217. [2021-03-10 21:14:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 2.3653222902412674) internal successors, (52548), 22216 states have internal predecessors, (52548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:48,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 52548 transitions. [2021-03-10 21:14:48,744 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 52548 transitions. Word has length 38 [2021-03-10 21:14:48,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:48,744 INFO L480 AbstractCegarLoop]: Abstraction has 22217 states and 52548 transitions. [2021-03-10 21:14:48,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 52548 transitions. [2021-03-10 21:14:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:48,757 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:48,757 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:48,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:48,957 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:48,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:48,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1362399864, now seen corresponding path program 72 times [2021-03-10 21:14:48,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:48,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605218518] [2021-03-10 21:14:48,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:49,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605218518] [2021-03-10 21:14:49,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319705939] [2021-03-10 21:14:49,125 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) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:49,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:14:49,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:49,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:49,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:49,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:49,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:14:49,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947867285] [2021-03-10 21:14:49,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:49,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:49,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:49,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:49,390 INFO L87 Difference]: Start difference. First operand 22217 states and 52548 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:50,007 INFO L93 Difference]: Finished difference Result 22805 states and 53843 transitions. [2021-03-10 21:14:50,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:14:50,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:50,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:50,032 INFO L225 Difference]: With dead ends: 22805 [2021-03-10 21:14:50,033 INFO L226 Difference]: Without dead ends: 22788 [2021-03-10 21:14:50,033 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 533.7ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:14:50,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22788 states. [2021-03-10 21:14:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22788 to 22542. [2021-03-10 21:14:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22542 states, 22541 states have (on average 2.3664433698593674) internal successors, (53342), 22541 states have internal predecessors, (53342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 53342 transitions. [2021-03-10 21:14:50,280 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 53342 transitions. Word has length 38 [2021-03-10 21:14:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:50,280 INFO L480 AbstractCegarLoop]: Abstraction has 22542 states and 53342 transitions. [2021-03-10 21:14:50,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:50,280 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 53342 transitions. [2021-03-10 21:14:50,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:50,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:50,293 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:50,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:50,493 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:50,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:50,494 INFO L82 PathProgramCache]: Analyzing trace with hash 668678558, now seen corresponding path program 73 times [2021-03-10 21:14:50,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:50,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988274418] [2021-03-10 21:14:50,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:50,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988274418] [2021-03-10 21:14:50,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563373357] [2021-03-10 21:14:50,643 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) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:50,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:50,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:50,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:50,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:14:50,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310379578] [2021-03-10 21:14:50,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:50,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:50,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:50,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:50,901 INFO L87 Difference]: Start difference. First operand 22542 states and 53342 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:51,514 INFO L93 Difference]: Finished difference Result 23126 states and 54628 transitions. [2021-03-10 21:14:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:14:51,515 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:51,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:51,539 INFO L225 Difference]: With dead ends: 23126 [2021-03-10 21:14:51,539 INFO L226 Difference]: Without dead ends: 23109 [2021-03-10 21:14:51,540 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 514.2ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:14:51,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23109 states. [2021-03-10 21:14:51,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23109 to 22863. [2021-03-10 21:14:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22863 states, 22862 states have (on average 2.367553144956697) internal successors, (54127), 22862 states have internal predecessors, (54127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22863 states to 22863 states and 54127 transitions. [2021-03-10 21:14:51,839 INFO L78 Accepts]: Start accepts. Automaton has 22863 states and 54127 transitions. Word has length 38 [2021-03-10 21:14:51,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:51,840 INFO L480 AbstractCegarLoop]: Abstraction has 22863 states and 54127 transitions. [2021-03-10 21:14:51,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 22863 states and 54127 transitions. [2021-03-10 21:14:51,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:51,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:51,853 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:52,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:52,054 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:52,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:52,054 INFO L82 PathProgramCache]: Analyzing trace with hash 109998596, now seen corresponding path program 74 times [2021-03-10 21:14:52,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:52,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891016490] [2021-03-10 21:14:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:52,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891016490] [2021-03-10 21:14:52,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517351312] [2021-03-10 21:14:52,210 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 [2021-03-10 21:14:52,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:52,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:52,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:52,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:52,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:52,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:14:52,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923414426] [2021-03-10 21:14:52,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:52,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:52,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:52,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:52,477 INFO L87 Difference]: Start difference. First operand 22863 states and 54127 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:53,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:53,262 INFO L93 Difference]: Finished difference Result 24322 states and 57349 transitions. [2021-03-10 21:14:53,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:14:53,263 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:53,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:53,288 INFO L225 Difference]: With dead ends: 24322 [2021-03-10 21:14:53,289 INFO L226 Difference]: Without dead ends: 24288 [2021-03-10 21:14:53,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 640.5ms TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:14:53,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24288 states. [2021-03-10 21:14:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24288 to 23374. [2021-03-10 21:14:53,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23374 states, 23373 states have (on average 2.3687588242844306) internal successors, (55365), 23373 states have internal predecessors, (55365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23374 states to 23374 states and 55365 transitions. [2021-03-10 21:14:53,543 INFO L78 Accepts]: Start accepts. Automaton has 23374 states and 55365 transitions. Word has length 38 [2021-03-10 21:14:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:53,543 INFO L480 AbstractCegarLoop]: Abstraction has 23374 states and 55365 transitions. [2021-03-10 21:14:53,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 23374 states and 55365 transitions. [2021-03-10 21:14:53,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:53,556 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:53,556 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:53,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:53,756 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:53,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:53,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1753534780, now seen corresponding path program 75 times [2021-03-10 21:14:53,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:53,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146974682] [2021-03-10 21:14:53,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:53,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146974682] [2021-03-10 21:14:53,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510507288] [2021-03-10 21:14:53,911 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 [2021-03-10 21:14:53,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:14:53,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:53,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:53,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:54,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:54,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-03-10 21:14:54,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404142638] [2021-03-10 21:14:54,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:14:54,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:54,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:14:54,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:14:54,221 INFO L87 Difference]: Start difference. First operand 23374 states and 55365 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:55,427 INFO L93 Difference]: Finished difference Result 27871 states and 65364 transitions. [2021-03-10 21:14:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:14:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:55,452 INFO L225 Difference]: With dead ends: 27871 [2021-03-10 21:14:55,453 INFO L226 Difference]: Without dead ends: 27837 [2021-03-10 21:14:55,453 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 702.7ms TimeCoverageRelationStatistics Valid=142, Invalid=1340, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:14:55,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27837 states. [2021-03-10 21:14:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27837 to 25120. [2021-03-10 21:14:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25120 states, 25119 states have (on average 2.3722281937975236) internal successors, (59588), 25119 states have internal predecessors, (59588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25120 states to 25120 states and 59588 transitions. [2021-03-10 21:14:55,740 INFO L78 Accepts]: Start accepts. Automaton has 25120 states and 59588 transitions. Word has length 38 [2021-03-10 21:14:55,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:55,740 INFO L480 AbstractCegarLoop]: Abstraction has 25120 states and 59588 transitions. [2021-03-10 21:14:55,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:55,740 INFO L276 IsEmpty]: Start isEmpty. Operand 25120 states and 59588 transitions. [2021-03-10 21:14:55,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:55,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:55,755 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:55,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:55,955 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:55,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:55,956 INFO L82 PathProgramCache]: Analyzing trace with hash 753620228, now seen corresponding path program 76 times [2021-03-10 21:14:55,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:55,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883135513] [2021-03-10 21:14:55,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:56,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883135513] [2021-03-10 21:14:56,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989309400] [2021-03-10 21:14:56,105 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 [2021-03-10 21:14:56,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:14:56,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:56,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:56,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:14:56,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:56,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-03-10 21:14:56,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129678115] [2021-03-10 21:14:56,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:14:56,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:56,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:14:56,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:14:56,412 INFO L87 Difference]: Start difference. First operand 25120 states and 59588 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:57,350 INFO L93 Difference]: Finished difference Result 28307 states and 66840 transitions. [2021-03-10 21:14:57,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:14:57,351 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:57,382 INFO L225 Difference]: With dead ends: 28307 [2021-03-10 21:14:57,383 INFO L226 Difference]: Without dead ends: 28255 [2021-03-10 21:14:57,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 691.0ms TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:14:57,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28255 states. [2021-03-10 21:14:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28255 to 26230. [2021-03-10 21:14:57,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26230 states, 26229 states have (on average 2.3725265927027337) internal successors, (62229), 26229 states have internal predecessors, (62229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26230 states to 26230 states and 62229 transitions. [2021-03-10 21:14:57,697 INFO L78 Accepts]: Start accepts. Automaton has 26230 states and 62229 transitions. Word has length 38 [2021-03-10 21:14:57,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:57,697 INFO L480 AbstractCegarLoop]: Abstraction has 26230 states and 62229 transitions. [2021-03-10 21:14:57,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:57,697 INFO L276 IsEmpty]: Start isEmpty. Operand 26230 states and 62229 transitions. [2021-03-10 21:14:57,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:57,712 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:57,712 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:57,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:57,912 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:57,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1813703360, now seen corresponding path program 77 times [2021-03-10 21:14:57,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:57,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863826972] [2021-03-10 21:14:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:58,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863826972] [2021-03-10 21:14:58,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68569539] [2021-03-10 21:14:58,106 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 [2021-03-10 21:14:58,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:14:58,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:58,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:58,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:58,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:58,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:14:58,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180714702] [2021-03-10 21:14:58,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:14:58,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:58,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:14:58,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:14:58,369 INFO L87 Difference]: Start difference. First operand 26230 states and 62229 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:59,025 INFO L93 Difference]: Finished difference Result 27788 states and 65761 transitions. [2021-03-10 21:14:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:14:59,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:14:59,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:59,056 INFO L225 Difference]: With dead ends: 27788 [2021-03-10 21:14:59,056 INFO L226 Difference]: Without dead ends: 27745 [2021-03-10 21:14:59,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 536.4ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:14:59,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27745 states. [2021-03-10 21:14:59,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27745 to 27377. [2021-03-10 21:14:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27377 states, 27376 states have (on average 2.3733927527761542) internal successors, (64974), 27376 states have internal predecessors, (64974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27377 states to 27377 states and 64974 transitions. [2021-03-10 21:14:59,375 INFO L78 Accepts]: Start accepts. Automaton has 27377 states and 64974 transitions. Word has length 38 [2021-03-10 21:14:59,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:59,375 INFO L480 AbstractCegarLoop]: Abstraction has 27377 states and 64974 transitions. [2021-03-10 21:14:59,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:59,375 INFO L276 IsEmpty]: Start isEmpty. Operand 27377 states and 64974 transitions. [2021-03-10 21:14:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:14:59,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:59,390 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:59,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-03-10 21:14:59,601 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:59,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1781515460, now seen corresponding path program 78 times [2021-03-10 21:14:59,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:59,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352309016] [2021-03-10 21:14:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:59,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352309016] [2021-03-10 21:14:59,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489060590] [2021-03-10 21:14:59,751 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 [2021-03-10 21:14:59,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:14:59,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:59,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:14:59,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:00,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:00,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:15:00,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492997603] [2021-03-10 21:15:00,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:15:00,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:00,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:15:00,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:15:00,123 INFO L87 Difference]: Start difference. First operand 27377 states and 64974 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:01,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:01,521 INFO L93 Difference]: Finished difference Result 36328 states and 85544 transitions. [2021-03-10 21:15:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:15:01,522 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:01,570 INFO L225 Difference]: With dead ends: 36328 [2021-03-10 21:15:01,570 INFO L226 Difference]: Without dead ends: 36251 [2021-03-10 21:15:01,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 935.5ms TimeCoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:15:01,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36251 states. [2021-03-10 21:15:02,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36251 to 31462. [2021-03-10 21:15:02,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31462 states, 31461 states have (on average 2.380757127872604) internal successors, (74901), 31461 states have internal predecessors, (74901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31462 states to 31462 states and 74901 transitions. [2021-03-10 21:15:02,171 INFO L78 Accepts]: Start accepts. Automaton has 31462 states and 74901 transitions. Word has length 38 [2021-03-10 21:15:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:02,171 INFO L480 AbstractCegarLoop]: Abstraction has 31462 states and 74901 transitions. [2021-03-10 21:15:02,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:02,171 INFO L276 IsEmpty]: Start isEmpty. Operand 31462 states and 74901 transitions. [2021-03-10 21:15:02,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:02,188 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:02,188 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:02,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:02,388 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:02,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:02,389 INFO L82 PathProgramCache]: Analyzing trace with hash -935549486, now seen corresponding path program 79 times [2021-03-10 21:15:02,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:02,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641262854] [2021-03-10 21:15:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:02,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641262854] [2021-03-10 21:15:02,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664164359] [2021-03-10 21:15:02,559 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 [2021-03-10 21:15:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:02,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:02,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:02,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:02,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 21:15:02,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102510058] [2021-03-10 21:15:02,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:15:02,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:02,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:15:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:15:02,846 INFO L87 Difference]: Start difference. First operand 31462 states and 74901 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:03,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:03,728 INFO L93 Difference]: Finished difference Result 33748 states and 79992 transitions. [2021-03-10 21:15:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:15:03,729 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:03,771 INFO L225 Difference]: With dead ends: 33748 [2021-03-10 21:15:03,771 INFO L226 Difference]: Without dead ends: 33715 [2021-03-10 21:15:03,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 536.4ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:15:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33715 states. [2021-03-10 21:15:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33715 to 32708. [2021-03-10 21:15:04,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32708 states, 32707 states have (on average 2.38224233344544) internal successors, (77916), 32707 states have internal predecessors, (77916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:04,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32708 states to 32708 states and 77916 transitions. [2021-03-10 21:15:04,185 INFO L78 Accepts]: Start accepts. Automaton has 32708 states and 77916 transitions. Word has length 38 [2021-03-10 21:15:04,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:04,185 INFO L480 AbstractCegarLoop]: Abstraction has 32708 states and 77916 transitions. [2021-03-10 21:15:04,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand 32708 states and 77916 transitions. [2021-03-10 21:15:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:04,200 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:04,201 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:04,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-03-10 21:15:04,401 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:04,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:04,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1172986756, now seen corresponding path program 80 times [2021-03-10 21:15:04,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:04,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469712412] [2021-03-10 21:15:04,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:04,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469712412] [2021-03-10 21:15:04,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663440792] [2021-03-10 21:15:04,556 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 [2021-03-10 21:15:04,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:04,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:04,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:04,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:15:04,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:04,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-03-10 21:15:04,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700317486] [2021-03-10 21:15:04,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:15:04,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:04,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:15:04,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:15:04,843 INFO L87 Difference]: Start difference. First operand 32708 states and 77916 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:05,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:05,463 INFO L93 Difference]: Finished difference Result 35110 states and 83307 transitions. [2021-03-10 21:15:05,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:15:05,464 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:05,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:05,506 INFO L225 Difference]: With dead ends: 35110 [2021-03-10 21:15:05,507 INFO L226 Difference]: Without dead ends: 35069 [2021-03-10 21:15:05,507 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 509.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:15:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35069 states. [2021-03-10 21:15:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35069 to 34187. [2021-03-10 21:15:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34187 states, 34186 states have (on average 2.3835780728953373) internal successors, (81485), 34186 states have internal predecessors, (81485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34187 states to 34187 states and 81485 transitions. [2021-03-10 21:15:06,007 INFO L78 Accepts]: Start accepts. Automaton has 34187 states and 81485 transitions. Word has length 38 [2021-03-10 21:15:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:06,007 INFO L480 AbstractCegarLoop]: Abstraction has 34187 states and 81485 transitions. [2021-03-10 21:15:06,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 34187 states and 81485 transitions. [2021-03-10 21:15:06,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:06,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:06,025 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:06,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-03-10 21:15:06,227 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:06,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2139718750, now seen corresponding path program 81 times [2021-03-10 21:15:06,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:06,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131355946] [2021-03-10 21:15:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:06,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131355946] [2021-03-10 21:15:06,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373472819] [2021-03-10 21:15:06,394 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 [2021-03-10 21:15:06,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:15:06,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:06,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:06,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:06,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:06,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-03-10 21:15:06,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27248379] [2021-03-10 21:15:06,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:15:06,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:06,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:15:06,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:15:06,756 INFO L87 Difference]: Start difference. First operand 34187 states and 81485 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:08,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:08,167 INFO L93 Difference]: Finished difference Result 40688 states and 96358 transitions. [2021-03-10 21:15:08,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:15:08,168 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:08,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:08,217 INFO L225 Difference]: With dead ends: 40688 [2021-03-10 21:15:08,217 INFO L226 Difference]: Without dead ends: 40654 [2021-03-10 21:15:08,218 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 927.2ms TimeCoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:15:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40654 states. [2021-03-10 21:15:08,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40654 to 37776. [2021-03-10 21:15:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37776 states, 37775 states have (on average 2.3929053606882857) internal successors, (90392), 37775 states have internal predecessors, (90392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37776 states to 37776 states and 90392 transitions. [2021-03-10 21:15:08,819 INFO L78 Accepts]: Start accepts. Automaton has 37776 states and 90392 transitions. Word has length 38 [2021-03-10 21:15:08,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:08,819 INFO L480 AbstractCegarLoop]: Abstraction has 37776 states and 90392 transitions. [2021-03-10 21:15:08,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 37776 states and 90392 transitions. [2021-03-10 21:15:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:08,837 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:08,837 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:09,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:09,038 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:09,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1191604386, now seen corresponding path program 82 times [2021-03-10 21:15:09,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:09,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59109343] [2021-03-10 21:15:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:09,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59109343] [2021-03-10 21:15:09,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580133022] [2021-03-10 21:15:09,210 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 [2021-03-10 21:15:09,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:09,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:09,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:09,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:15:09,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:09,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-03-10 21:15:09,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925133313] [2021-03-10 21:15:09,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:15:09,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:09,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:15:09,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:15:09,567 INFO L87 Difference]: Start difference. First operand 37776 states and 90392 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:10,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:10,603 INFO L93 Difference]: Finished difference Result 40320 states and 96087 transitions. [2021-03-10 21:15:10,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:15:10,604 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:10,651 INFO L225 Difference]: With dead ends: 40320 [2021-03-10 21:15:10,651 INFO L226 Difference]: Without dead ends: 40277 [2021-03-10 21:15:10,651 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 770.9ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:15:10,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40277 states. [2021-03-10 21:15:11,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40277 to 37806. [2021-03-10 21:15:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37806 states, 37805 states have (on average 2.3926464753339505) internal successors, (90454), 37805 states have internal predecessors, (90454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37806 states to 37806 states and 90454 transitions. [2021-03-10 21:15:11,141 INFO L78 Accepts]: Start accepts. Automaton has 37806 states and 90454 transitions. Word has length 38 [2021-03-10 21:15:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:11,141 INFO L480 AbstractCegarLoop]: Abstraction has 37806 states and 90454 transitions. [2021-03-10 21:15:11,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 37806 states and 90454 transitions. [2021-03-10 21:15:11,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:11,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:11,158 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:11,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:11,359 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:11,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:11,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2023964272, now seen corresponding path program 83 times [2021-03-10 21:15:11,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:11,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140235296] [2021-03-10 21:15:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:11,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140235296] [2021-03-10 21:15:11,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658769683] [2021-03-10 21:15:11,515 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 [2021-03-10 21:15:11,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:15:11,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:11,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:11,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:11,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:11,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 21:15:11,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410013897] [2021-03-10 21:15:11,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:15:11,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:11,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:15:11,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:15:11,815 INFO L87 Difference]: Start difference. First operand 37806 states and 90454 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:12,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:12,564 INFO L93 Difference]: Finished difference Result 39152 states and 93430 transitions. [2021-03-10 21:15:12,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:15:12,565 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:12,614 INFO L225 Difference]: With dead ends: 39152 [2021-03-10 21:15:12,614 INFO L226 Difference]: Without dead ends: 39118 [2021-03-10 21:15:12,615 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 620.1ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:15:12,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39118 states. [2021-03-10 21:15:13,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39118 to 38927. [2021-03-10 21:15:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38927 states, 38926 states have (on average 2.3894055387144837) internal successors, (93010), 38926 states have internal predecessors, (93010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38927 states to 38927 states and 93010 transitions. [2021-03-10 21:15:13,188 INFO L78 Accepts]: Start accepts. Automaton has 38927 states and 93010 transitions. Word has length 38 [2021-03-10 21:15:13,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:13,188 INFO L480 AbstractCegarLoop]: Abstraction has 38927 states and 93010 transitions. [2021-03-10 21:15:13,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:13,188 INFO L276 IsEmpty]: Start isEmpty. Operand 38927 states and 93010 transitions. [2021-03-10 21:15:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:13,207 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:13,207 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:13,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:13,428 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:13,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:13,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1797244792, now seen corresponding path program 84 times [2021-03-10 21:15:13,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:13,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811227380] [2021-03-10 21:15:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:13,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811227380] [2021-03-10 21:15:13,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961185379] [2021-03-10 21:15:13,600 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 [2021-03-10 21:15:13,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:15:13,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:13,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:13,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:13,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:13,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:15:13,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384665708] [2021-03-10 21:15:13,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:15:13,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:13,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:15:13,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:15:13,888 INFO L87 Difference]: Start difference. First operand 38927 states and 93010 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:14,673 INFO L93 Difference]: Finished difference Result 39710 states and 94740 transitions. [2021-03-10 21:15:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:15:14,674 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:14,726 INFO L225 Difference]: With dead ends: 39710 [2021-03-10 21:15:14,726 INFO L226 Difference]: Without dead ends: 39676 [2021-03-10 21:15:14,726 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 646.0ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:15:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39676 states. [2021-03-10 21:15:15,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39676 to 39279. [2021-03-10 21:15:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39279 states, 39278 states have (on average 2.390091145170324) internal successors, (93878), 39278 states have internal predecessors, (93878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39279 states to 39279 states and 93878 transitions. [2021-03-10 21:15:15,192 INFO L78 Accepts]: Start accepts. Automaton has 39279 states and 93878 transitions. Word has length 38 [2021-03-10 21:15:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:15,192 INFO L480 AbstractCegarLoop]: Abstraction has 39279 states and 93878 transitions. [2021-03-10 21:15:15,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 39279 states and 93878 transitions. [2021-03-10 21:15:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:15,210 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:15,210 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:15,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-03-10 21:15:15,411 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:15,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:15,411 INFO L82 PathProgramCache]: Analyzing trace with hash -153708608, now seen corresponding path program 85 times [2021-03-10 21:15:15,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:15,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137669813] [2021-03-10 21:15:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:15,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137669813] [2021-03-10 21:15:15,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030167320] [2021-03-10 21:15:15,569 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 [2021-03-10 21:15:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:15,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:15,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:15,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:15,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 21:15:15,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772597852] [2021-03-10 21:15:15,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:15:15,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:15,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:15:15,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:15:15,863 INFO L87 Difference]: Start difference. First operand 39279 states and 93878 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:16,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:16,710 INFO L93 Difference]: Finished difference Result 41067 states and 97771 transitions. [2021-03-10 21:15:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:15:16,711 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:16,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:16,758 INFO L225 Difference]: With dead ends: 41067 [2021-03-10 21:15:16,759 INFO L226 Difference]: Without dead ends: 41033 [2021-03-10 21:15:16,759 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 639.7ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:15:16,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41033 states. [2021-03-10 21:15:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41033 to 39745. [2021-03-10 21:15:17,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39745 states, 39744 states have (on average 2.3893669484702094) internal successors, (94963), 39744 states have internal predecessors, (94963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39745 states to 39745 states and 94963 transitions. [2021-03-10 21:15:17,242 INFO L78 Accepts]: Start accepts. Automaton has 39745 states and 94963 transitions. Word has length 38 [2021-03-10 21:15:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:17,242 INFO L480 AbstractCegarLoop]: Abstraction has 39745 states and 94963 transitions. [2021-03-10 21:15:17,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 39745 states and 94963 transitions. [2021-03-10 21:15:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:17,260 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:17,260 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:17,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:17,460 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:17,461 INFO L82 PathProgramCache]: Analyzing trace with hash -833600632, now seen corresponding path program 86 times [2021-03-10 21:15:17,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:17,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373545985] [2021-03-10 21:15:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:17,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373545985] [2021-03-10 21:15:17,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428679281] [2021-03-10 21:15:17,615 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:17,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:17,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:17,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:17,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:15:17,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:17,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-03-10 21:15:17,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574427198] [2021-03-10 21:15:17,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:15:17,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:17,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:15:17,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:15:17,932 INFO L87 Difference]: Start difference. First operand 39745 states and 94963 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:18,809 INFO L93 Difference]: Finished difference Result 42419 states and 100916 transitions. [2021-03-10 21:15:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:15:18,810 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:18,865 INFO L225 Difference]: With dead ends: 42419 [2021-03-10 21:15:18,866 INFO L226 Difference]: Without dead ends: 42376 [2021-03-10 21:15:18,866 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 608.9ms TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:15:18,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2021-03-10 21:15:19,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 39971. [2021-03-10 21:15:19,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39971 states, 39970 states have (on average 2.3887415561671252) internal successors, (95478), 39970 states have internal predecessors, (95478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39971 states to 39971 states and 95478 transitions. [2021-03-10 21:15:19,375 INFO L78 Accepts]: Start accepts. Automaton has 39971 states and 95478 transitions. Word has length 38 [2021-03-10 21:15:19,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:19,376 INFO L480 AbstractCegarLoop]: Abstraction has 39971 states and 95478 transitions. [2021-03-10 21:15:19,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:19,376 INFO L276 IsEmpty]: Start isEmpty. Operand 39971 states and 95478 transitions. [2021-03-10 21:15:19,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:19,394 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:19,394 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:19,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-03-10 21:15:19,595 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:19,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:19,595 INFO L82 PathProgramCache]: Analyzing trace with hash 983400630, now seen corresponding path program 87 times [2021-03-10 21:15:19,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:19,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621406462] [2021-03-10 21:15:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:19,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621406462] [2021-03-10 21:15:19,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485261734] [2021-03-10 21:15:19,756 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 [2021-03-10 21:15:19,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:15:19,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:19,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:19,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:20,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:20,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:15:20,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022411378] [2021-03-10 21:15:20,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:15:20,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:20,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:15:20,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:15:20,224 INFO L87 Difference]: Start difference. First operand 39971 states and 95478 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:20,927 INFO L93 Difference]: Finished difference Result 40507 states and 96663 transitions. [2021-03-10 21:15:20,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:15:20,928 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:20,977 INFO L225 Difference]: With dead ends: 40507 [2021-03-10 21:15:20,977 INFO L226 Difference]: Without dead ends: 40490 [2021-03-10 21:15:20,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 551.8ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:15:21,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40490 states. [2021-03-10 21:15:21,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40490 to 40295. [2021-03-10 21:15:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40295 states, 40294 states have (on average 2.389189457487467) internal successors, (96270), 40294 states have internal predecessors, (96270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40295 states to 40295 states and 96270 transitions. [2021-03-10 21:15:21,460 INFO L78 Accepts]: Start accepts. Automaton has 40295 states and 96270 transitions. Word has length 38 [2021-03-10 21:15:21,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:21,460 INFO L480 AbstractCegarLoop]: Abstraction has 40295 states and 96270 transitions. [2021-03-10 21:15:21,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 40295 states and 96270 transitions. [2021-03-10 21:15:21,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:21,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:21,478 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:21,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:21,679 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:21,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:21,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1143426556, now seen corresponding path program 88 times [2021-03-10 21:15:21,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:21,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275919532] [2021-03-10 21:15:21,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:21,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275919532] [2021-03-10 21:15:21,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190307664] [2021-03-10 21:15:21,839 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 [2021-03-10 21:15:21,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:21,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:21,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:21,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:22,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:22,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:15:22,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516930161] [2021-03-10 21:15:22,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:15:22,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:22,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:15:22,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:15:22,130 INFO L87 Difference]: Start difference. First operand 40295 states and 96270 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:22,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:22,813 INFO L93 Difference]: Finished difference Result 40827 states and 97446 transitions. [2021-03-10 21:15:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:15:22,814 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:22,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:22,865 INFO L225 Difference]: With dead ends: 40827 [2021-03-10 21:15:22,865 INFO L226 Difference]: Without dead ends: 40810 [2021-03-10 21:15:22,866 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:15:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40810 states. [2021-03-10 21:15:23,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40810 to 40615. [2021-03-10 21:15:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40615 states, 40614 states have (on average 2.389643965135175) internal successors, (97053), 40614 states have internal predecessors, (97053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40615 states to 40615 states and 97053 transitions. [2021-03-10 21:15:23,540 INFO L78 Accepts]: Start accepts. Automaton has 40615 states and 97053 transitions. Word has length 38 [2021-03-10 21:15:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:23,540 INFO L480 AbstractCegarLoop]: Abstraction has 40615 states and 97053 transitions. [2021-03-10 21:15:23,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 40615 states and 97053 transitions. [2021-03-10 21:15:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:23,559 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:23,559 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:23,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:23,759 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:23,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:23,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1660475200, now seen corresponding path program 89 times [2021-03-10 21:15:23,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:23,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481907640] [2021-03-10 21:15:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:23,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481907640] [2021-03-10 21:15:23,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901593671] [2021-03-10 21:15:23,925 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 [2021-03-10 21:15:23,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:15:23,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:23,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:23,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:24,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:24,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-03-10 21:15:24,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88582978] [2021-03-10 21:15:24,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 21:15:24,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:24,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 21:15:24,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:15:24,296 INFO L87 Difference]: Start difference. First operand 40615 states and 97053 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:25,287 INFO L93 Difference]: Finished difference Result 41685 states and 99369 transitions. [2021-03-10 21:15:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:15:25,287 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:25,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:25,337 INFO L225 Difference]: With dead ends: 41685 [2021-03-10 21:15:25,338 INFO L226 Difference]: Without dead ends: 41668 [2021-03-10 21:15:25,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 771.0ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:15:25,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41668 states. [2021-03-10 21:15:25,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41668 to 40952. [2021-03-10 21:15:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40952 states, 40951 states have (on average 2.390124783277576) internal successors, (97878), 40951 states have internal predecessors, (97878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40952 states to 40952 states and 97878 transitions. [2021-03-10 21:15:25,943 INFO L78 Accepts]: Start accepts. Automaton has 40952 states and 97878 transitions. Word has length 38 [2021-03-10 21:15:25,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:25,943 INFO L480 AbstractCegarLoop]: Abstraction has 40952 states and 97878 transitions. [2021-03-10 21:15:25,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand 40952 states and 97878 transitions. [2021-03-10 21:15:25,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:25,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:25,967 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:26,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-03-10 21:15:26,170 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:26,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:26,171 INFO L82 PathProgramCache]: Analyzing trace with hash 222587144, now seen corresponding path program 90 times [2021-03-10 21:15:26,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:26,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598890842] [2021-03-10 21:15:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:26,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598890842] [2021-03-10 21:15:26,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073721610] [2021-03-10 21:15:26,327 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) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:26,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:15:26,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:26,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:26,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:26,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:26,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:15:26,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126207836] [2021-03-10 21:15:26,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:15:26,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:26,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:15:26,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:15:26,591 INFO L87 Difference]: Start difference. First operand 40952 states and 97878 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:27,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:27,406 INFO L93 Difference]: Finished difference Result 41871 states and 99905 transitions. [2021-03-10 21:15:27,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:15:27,407 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:27,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:27,456 INFO L225 Difference]: With dead ends: 41871 [2021-03-10 21:15:27,456 INFO L226 Difference]: Without dead ends: 41837 [2021-03-10 21:15:27,456 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 580.8ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:15:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41837 states. [2021-03-10 21:15:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41837 to 41439. [2021-03-10 21:15:28,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41439 states, 41438 states have (on average 2.3901974033495823) internal successors, (99045), 41438 states have internal predecessors, (99045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:28,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41439 states to 41439 states and 99045 transitions. [2021-03-10 21:15:28,107 INFO L78 Accepts]: Start accepts. Automaton has 41439 states and 99045 transitions. Word has length 38 [2021-03-10 21:15:28,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:28,107 INFO L480 AbstractCegarLoop]: Abstraction has 41439 states and 99045 transitions. [2021-03-10 21:15:28,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 41439 states and 99045 transitions. [2021-03-10 21:15:28,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:28,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:28,126 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:28,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-03-10 21:15:28,327 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:28,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:28,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1866123328, now seen corresponding path program 91 times [2021-03-10 21:15:28,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:28,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833991718] [2021-03-10 21:15:28,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:28,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833991718] [2021-03-10 21:15:28,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319185799] [2021-03-10 21:15:28,724 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 [2021-03-10 21:15:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:28,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:28,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:29,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:29,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-03-10 21:15:29,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318732429] [2021-03-10 21:15:29,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:15:29,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:29,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:15:29,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:15:29,023 INFO L87 Difference]: Start difference. First operand 41439 states and 99045 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:29,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:29,967 INFO L93 Difference]: Finished difference Result 43352 states and 103181 transitions. [2021-03-10 21:15:29,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:15:29,968 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:29,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:30,017 INFO L225 Difference]: With dead ends: 43352 [2021-03-10 21:15:30,017 INFO L226 Difference]: Without dead ends: 43318 [2021-03-10 21:15:30,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 623.1ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:15:30,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43318 states. [2021-03-10 21:15:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43318 to 42025. [2021-03-10 21:15:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42025 states, 42024 states have (on average 2.389539310869979) internal successors, (100418), 42024 states have internal predecessors, (100418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42025 states to 42025 states and 100418 transitions. [2021-03-10 21:15:30,578 INFO L78 Accepts]: Start accepts. Automaton has 42025 states and 100418 transitions. Word has length 38 [2021-03-10 21:15:30,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:30,578 INFO L480 AbstractCegarLoop]: Abstraction has 42025 states and 100418 transitions. [2021-03-10 21:15:30,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:30,578 INFO L276 IsEmpty]: Start isEmpty. Operand 42025 states and 100418 transitions. [2021-03-10 21:15:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:30,597 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:30,597 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:30,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:30,798 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:30,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:30,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1186231304, now seen corresponding path program 92 times [2021-03-10 21:15:30,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:30,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225739864] [2021-03-10 21:15:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:30,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225739864] [2021-03-10 21:15:30,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245052743] [2021-03-10 21:15:30,955 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 [2021-03-10 21:15:30,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:30,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:30,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:30,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:15:31,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:31,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-03-10 21:15:31,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154056725] [2021-03-10 21:15:31,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 21:15:31,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:31,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 21:15:31,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:15:31,417 INFO L87 Difference]: Start difference. First operand 42025 states and 100418 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:32,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:32,142 INFO L93 Difference]: Finished difference Result 44617 states and 106177 transitions. [2021-03-10 21:15:32,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:15:32,143 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:32,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:32,197 INFO L225 Difference]: With dead ends: 44617 [2021-03-10 21:15:32,197 INFO L226 Difference]: Without dead ends: 44574 [2021-03-10 21:15:32,197 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 707.2ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:15:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44574 states. [2021-03-10 21:15:32,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44574 to 43210. [2021-03-10 21:15:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43210 states, 43209 states have (on average 2.3895021870443656) internal successors, (103248), 43209 states have internal predecessors, (103248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43210 states to 43210 states and 103248 transitions. [2021-03-10 21:15:32,876 INFO L78 Accepts]: Start accepts. Automaton has 43210 states and 103248 transitions. Word has length 38 [2021-03-10 21:15:32,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:32,876 INFO L480 AbstractCegarLoop]: Abstraction has 43210 states and 103248 transitions. [2021-03-10 21:15:32,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 43210 states and 103248 transitions. [2021-03-10 21:15:32,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:32,897 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:32,898 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:33,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-03-10 21:15:33,099 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:33,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:33,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1481114862, now seen corresponding path program 93 times [2021-03-10 21:15:33,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:33,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655738564] [2021-03-10 21:15:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:33,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655738564] [2021-03-10 21:15:33,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971211786] [2021-03-10 21:15:33,258 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 [2021-03-10 21:15:33,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:15:33,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:33,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:33,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:33,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:33,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:15:33,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842852834] [2021-03-10 21:15:33,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:15:33,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:33,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:15:33,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:15:33,539 INFO L87 Difference]: Start difference. First operand 43210 states and 103248 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:34,307 INFO L93 Difference]: Finished difference Result 43750 states and 104441 transitions. [2021-03-10 21:15:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:15:34,308 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:34,362 INFO L225 Difference]: With dead ends: 43750 [2021-03-10 21:15:34,362 INFO L226 Difference]: Without dead ends: 43733 [2021-03-10 21:15:34,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 531.7ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:15:34,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43733 states. [2021-03-10 21:15:34,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43733 to 43536. [2021-03-10 21:15:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43536 states, 43535 states have (on average 2.389893189387849) internal successors, (104044), 43535 states have internal predecessors, (104044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43536 states to 43536 states and 104044 transitions. [2021-03-10 21:15:35,027 INFO L78 Accepts]: Start accepts. Automaton has 43536 states and 104044 transitions. Word has length 38 [2021-03-10 21:15:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:35,028 INFO L480 AbstractCegarLoop]: Abstraction has 43536 states and 104044 transitions. [2021-03-10 21:15:35,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 43536 states and 104044 transitions. [2021-03-10 21:15:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 21:15:35,045 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:35,045 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:35,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 21:15:35,246 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:35,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:35,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1460963246, now seen corresponding path program 94 times [2021-03-10 21:15:35,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:35,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147256178] [2021-03-10 21:15:35,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:35,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147256178] [2021-03-10 21:15:35,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019294064] [2021-03-10 21:15:35,404 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 [2021-03-10 21:15:35,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:35,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:15:35,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:35,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:35,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 21:15:35,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362829042] [2021-03-10 21:15:35,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:15:35,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:35,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:15:35,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:15:35,681 INFO L87 Difference]: Start difference. First operand 43536 states and 104044 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:36,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:36,382 INFO L93 Difference]: Finished difference Result 44087 states and 105256 transitions. [2021-03-10 21:15:36,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:15:36,383 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-03-10 21:15:36,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:36,436 INFO L225 Difference]: With dead ends: 44087 [2021-03-10 21:15:36,436 INFO L226 Difference]: Without dead ends: 44070 [2021-03-10 21:15:36,437 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 605.1ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:15:36,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44070 states. [2021-03-10 21:15:36,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44070 to 43846. [2021-03-10 21:15:37,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43846 states, 43845 states have (on average 2.3903523776941498) internal successors, (104805), 43845 states have internal predecessors, (104805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43846 states to 43846 states and 104805 transitions. [2021-03-10 21:15:37,104 INFO L78 Accepts]: Start accepts. Automaton has 43846 states and 104805 transitions. Word has length 38 [2021-03-10 21:15:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:37,105 INFO L480 AbstractCegarLoop]: Abstraction has 43846 states and 104805 transitions. [2021-03-10 21:15:37,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 43846 states and 104805 transitions. [2021-03-10 21:15:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 21:15:37,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:37,299 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:37,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-10 21:15:37,505 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:37,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:37,505 INFO L82 PathProgramCache]: Analyzing trace with hash -488174358, now seen corresponding path program 95 times [2021-03-10 21:15:37,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:37,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92237103] [2021-03-10 21:15:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:37,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92237103] [2021-03-10 21:15:37,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424702703] [2021-03-10 21:15:37,545 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 [2021-03-10 21:15:37,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:15:37,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:37,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:15:37,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:37,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:37,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:15:37,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280221] [2021-03-10 21:15:37,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:15:37,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:37,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:15:37,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:15:37,622 INFO L87 Difference]: Start difference. First operand 43846 states and 104805 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:37,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:37,838 INFO L93 Difference]: Finished difference Result 54955 states and 131607 transitions. [2021-03-10 21:15:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:15:37,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 21:15:37,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:37,911 INFO L225 Difference]: With dead ends: 54955 [2021-03-10 21:15:37,911 INFO L226 Difference]: Without dead ends: 54921 [2021-03-10 21:15:37,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:15:37,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54921 states. [2021-03-10 21:15:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54921 to 54598. [2021-03-10 21:15:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54598 states, 54597 states have (on average 2.3952781288349176) internal successors, (130775), 54597 states have internal predecessors, (130775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:38,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54598 states to 54598 states and 130775 transitions. [2021-03-10 21:15:38,925 INFO L78 Accepts]: Start accepts. Automaton has 54598 states and 130775 transitions. Word has length 39 [2021-03-10 21:15:38,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:38,925 INFO L480 AbstractCegarLoop]: Abstraction has 54598 states and 130775 transitions. [2021-03-10 21:15:38,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 54598 states and 130775 transitions. [2021-03-10 21:15:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 21:15:38,944 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:38,944 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:39,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:39,144 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:39,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1273067626, now seen corresponding path program 96 times [2021-03-10 21:15:39,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:39,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120844935] [2021-03-10 21:15:39,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:39,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120844935] [2021-03-10 21:15:39,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176323445] [2021-03-10 21:15:39,173 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) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:39,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:15:39,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:15:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:15:39,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:39,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:15:39,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566200832] [2021-03-10 21:15:39,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:15:39,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:39,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:15:39,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:15:39,250 INFO L87 Difference]: Start difference. First operand 54598 states and 130775 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:39,448 INFO L93 Difference]: Finished difference Result 54798 states and 130742 transitions. [2021-03-10 21:15:39,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:39,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 21:15:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:39,519 INFO L225 Difference]: With dead ends: 54798 [2021-03-10 21:15:39,520 INFO L226 Difference]: Without dead ends: 54798 [2021-03-10 21:15:39,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:39,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54798 states. [2021-03-10 21:15:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54798 to 49862. [2021-03-10 21:15:40,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49862 states, 49861 states have (on average 2.3922705120234253) internal successors, (119281), 49861 states have internal predecessors, (119281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49862 states to 49862 states and 119281 transitions. [2021-03-10 21:15:40,443 INFO L78 Accepts]: Start accepts. Automaton has 49862 states and 119281 transitions. Word has length 39 [2021-03-10 21:15:40,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:40,444 INFO L480 AbstractCegarLoop]: Abstraction has 49862 states and 119281 transitions. [2021-03-10 21:15:40,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:40,444 INFO L276 IsEmpty]: Start isEmpty. Operand 49862 states and 119281 transitions. [2021-03-10 21:15:40,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 21:15:40,464 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:40,464 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:40,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-03-10 21:15:40,665 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:40,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2021062548, now seen corresponding path program 97 times [2021-03-10 21:15:40,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:40,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938871699] [2021-03-10 21:15:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:40,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938871699] [2021-03-10 21:15:40,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402836031] [2021-03-10 21:15:40,690 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 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 [2021-03-10 21:15:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:40,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:15:40,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:40,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:40,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:15:40,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936167376] [2021-03-10 21:15:40,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:15:40,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:40,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:15:40,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:15:40,770 INFO L87 Difference]: Start difference. First operand 49862 states and 119281 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:41,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:41,190 INFO L93 Difference]: Finished difference Result 51794 states and 123670 transitions. [2021-03-10 21:15:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:15:41,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 21:15:41,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:41,265 INFO L225 Difference]: With dead ends: 51794 [2021-03-10 21:15:41,266 INFO L226 Difference]: Without dead ends: 51790 [2021-03-10 21:15:41,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:15:41,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51790 states. [2021-03-10 21:15:41,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51790 to 51361. [2021-03-10 21:15:42,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51361 states, 51360 states have (on average 2.3916082554517133) internal successors, (122833), 51360 states have internal predecessors, (122833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51361 states to 51361 states and 122833 transitions. [2021-03-10 21:15:42,127 INFO L78 Accepts]: Start accepts. Automaton has 51361 states and 122833 transitions. Word has length 39 [2021-03-10 21:15:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:42,127 INFO L480 AbstractCegarLoop]: Abstraction has 51361 states and 122833 transitions. [2021-03-10 21:15:42,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 51361 states and 122833 transitions. [2021-03-10 21:15:42,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 21:15:42,146 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:42,146 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:42,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-03-10 21:15:42,347 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:42,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:42,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1868537008, now seen corresponding path program 98 times [2021-03-10 21:15:42,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:42,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449271661] [2021-03-10 21:15:42,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:15:42,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449271661] [2021-03-10 21:15:42,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087095913] [2021-03-10 21:15:42,372 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 [2021-03-10 21:15:42,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:42,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:42,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:15:42,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:15:42,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:42,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:15:42,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626618982] [2021-03-10 21:15:42,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:15:42,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:42,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:15:42,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:15:42,480 INFO L87 Difference]: Start difference. First operand 51361 states and 122833 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:42,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:42,712 INFO L93 Difference]: Finished difference Result 53808 states and 127704 transitions. [2021-03-10 21:15:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:42,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 21:15:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:42,789 INFO L225 Difference]: With dead ends: 53808 [2021-03-10 21:15:42,790 INFO L226 Difference]: Without dead ends: 53805 [2021-03-10 21:15:42,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:42,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53805 states. [2021-03-10 21:15:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53805 to 52349. [2021-03-10 21:15:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52349 states, 52348 states have (on average 2.3850576908382366) internal successors, (124853), 52348 states have internal predecessors, (124853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52349 states to 52349 states and 124853 transitions. [2021-03-10 21:15:43,922 INFO L78 Accepts]: Start accepts. Automaton has 52349 states and 124853 transitions. Word has length 39 [2021-03-10 21:15:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:43,922 INFO L480 AbstractCegarLoop]: Abstraction has 52349 states and 124853 transitions. [2021-03-10 21:15:43,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 52349 states and 124853 transitions. [2021-03-10 21:15:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 21:15:43,942 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:43,942 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:44,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-10 21:15:44,142 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:44,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1961116246, now seen corresponding path program 99 times [2021-03-10 21:15:44,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:44,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957518197] [2021-03-10 21:15:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:44,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957518197] [2021-03-10 21:15:44,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681084154] [2021-03-10 21:15:44,172 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 [2021-03-10 21:15:44,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:15:44,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:44,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:15:44,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:15:44,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:44,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:15:44,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864967678] [2021-03-10 21:15:44,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:15:44,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:44,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:15:44,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:15:44,255 INFO L87 Difference]: Start difference. First operand 52349 states and 124853 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:44,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:44,489 INFO L93 Difference]: Finished difference Result 52855 states and 124721 transitions. [2021-03-10 21:15:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:44,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 21:15:44,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:44,559 INFO L225 Difference]: With dead ends: 52855 [2021-03-10 21:15:44,559 INFO L226 Difference]: Without dead ends: 52852 [2021-03-10 21:15:44,559 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:44,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52852 states. [2021-03-10 21:15:45,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52852 to 50549. [2021-03-10 21:15:45,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50549 states, 50548 states have (on average 2.3744163962965894) internal successors, (120022), 50548 states have internal predecessors, (120022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50549 states to 50549 states and 120022 transitions. [2021-03-10 21:15:45,473 INFO L78 Accepts]: Start accepts. Automaton has 50549 states and 120022 transitions. Word has length 39 [2021-03-10 21:15:45,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:45,473 INFO L480 AbstractCegarLoop]: Abstraction has 50549 states and 120022 transitions. [2021-03-10 21:15:45,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:45,473 INFO L276 IsEmpty]: Start isEmpty. Operand 50549 states and 120022 transitions. [2021-03-10 21:15:45,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 21:15:45,491 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:45,491 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:45,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:45,691 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:45,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:45,692 INFO L82 PathProgramCache]: Analyzing trace with hash -477075350, now seen corresponding path program 100 times [2021-03-10 21:15:45,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:45,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205405975] [2021-03-10 21:15:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:45,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205405975] [2021-03-10 21:15:45,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138551183] [2021-03-10 21:15:45,720 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 [2021-03-10 21:15:45,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:45,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:45,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:15:45,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:45,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:45,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:15:45,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738991865] [2021-03-10 21:15:45,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:15:45,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:45,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:15:45,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:15:45,790 INFO L87 Difference]: Start difference. First operand 50549 states and 120022 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:45,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:45,994 INFO L93 Difference]: Finished difference Result 50891 states and 120586 transitions. [2021-03-10 21:15:45,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:45,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 21:15:45,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:46,066 INFO L225 Difference]: With dead ends: 50891 [2021-03-10 21:15:46,066 INFO L226 Difference]: Without dead ends: 50871 [2021-03-10 21:15:46,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:15:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50871 states. [2021-03-10 21:15:46,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50871 to 50523. [2021-03-10 21:15:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50523 states, 50522 states have (on average 2.3704326827916553) internal successors, (119759), 50522 states have internal predecessors, (119759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50523 states to 50523 states and 119759 transitions. [2021-03-10 21:15:46,993 INFO L78 Accepts]: Start accepts. Automaton has 50523 states and 119759 transitions. Word has length 39 [2021-03-10 21:15:46,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:46,993 INFO L480 AbstractCegarLoop]: Abstraction has 50523 states and 119759 transitions. [2021-03-10 21:15:46,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand 50523 states and 119759 transitions. [2021-03-10 21:15:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 21:15:47,012 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:47,012 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:47,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:47,213 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:47,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:47,213 INFO L82 PathProgramCache]: Analyzing trace with hash 100006250, now seen corresponding path program 101 times [2021-03-10 21:15:47,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:47,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360554100] [2021-03-10 21:15:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:47,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360554100] [2021-03-10 21:15:47,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547213940] [2021-03-10 21:15:47,241 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) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:47,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:15:47,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:47,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:15:47,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:15:47,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:47,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:15:47,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123399524] [2021-03-10 21:15:47,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:15:47,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:47,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:15:47,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:15:47,643 INFO L87 Difference]: Start difference. First operand 50523 states and 119759 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:47,838 INFO L93 Difference]: Finished difference Result 51054 states and 120870 transitions. [2021-03-10 21:15:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:15:47,846 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 21:15:47,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:47,910 INFO L225 Difference]: With dead ends: 51054 [2021-03-10 21:15:47,910 INFO L226 Difference]: Without dead ends: 51050 [2021-03-10 21:15:47,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:15:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51050 states. [2021-03-10 21:15:48,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51050 to 50840. [2021-03-10 21:15:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50840 states, 50839 states have (on average 2.3698341824190092) internal successors, (120480), 50839 states have internal predecessors, (120480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50840 states to 50840 states and 120480 transitions. [2021-03-10 21:15:48,735 INFO L78 Accepts]: Start accepts. Automaton has 50840 states and 120480 transitions. Word has length 39 [2021-03-10 21:15:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:48,735 INFO L480 AbstractCegarLoop]: Abstraction has 50840 states and 120480 transitions. [2021-03-10 21:15:48,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 50840 states and 120480 transitions. [2021-03-10 21:15:48,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 21:15:48,754 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:48,754 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:48,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:48,955 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:48,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:48,955 INFO L82 PathProgramCache]: Analyzing trace with hash -305361490, now seen corresponding path program 102 times [2021-03-10 21:15:48,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:48,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690502407] [2021-03-10 21:15:48,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:48,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690502407] [2021-03-10 21:15:48,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113885503] [2021-03-10 21:15:48,979 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) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:48,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:15:48,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:48,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:15:48,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:15:49,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:49,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:15:49,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628076923] [2021-03-10 21:15:49,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:15:49,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:49,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:15:49,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:15:49,059 INFO L87 Difference]: Start difference. First operand 50840 states and 120480 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:49,265 INFO L93 Difference]: Finished difference Result 52488 states and 123817 transitions. [2021-03-10 21:15:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:49,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 21:15:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:49,336 INFO L225 Difference]: With dead ends: 52488 [2021-03-10 21:15:49,336 INFO L226 Difference]: Without dead ends: 52485 [2021-03-10 21:15:49,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:15:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52485 states. [2021-03-10 21:15:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52485 to 51238. [2021-03-10 21:15:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51238 states, 51237 states have (on average 2.3674493042137517) internal successors, (121301), 51237 states have internal predecessors, (121301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51238 states to 51238 states and 121301 transitions. [2021-03-10 21:15:50,249 INFO L78 Accepts]: Start accepts. Automaton has 51238 states and 121301 transitions. Word has length 39 [2021-03-10 21:15:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:50,249 INFO L480 AbstractCegarLoop]: Abstraction has 51238 states and 121301 transitions. [2021-03-10 21:15:50,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 51238 states and 121301 transitions. [2021-03-10 21:15:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 21:15:50,267 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:50,267 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:50,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-10 21:15:50,468 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:50,468 INFO L82 PathProgramCache]: Analyzing trace with hash 159952552, now seen corresponding path program 103 times [2021-03-10 21:15:50,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:50,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904146294] [2021-03-10 21:15:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:15:50,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904146294] [2021-03-10 21:15:50,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473401408] [2021-03-10 21:15:50,491 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 [2021-03-10 21:15:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:50,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:15:50,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:15:50,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:50,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:15:50,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276068712] [2021-03-10 21:15:50,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:15:50,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:50,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:15:50,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:15:50,569 INFO L87 Difference]: Start difference. First operand 51238 states and 121301 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:50,778 INFO L93 Difference]: Finished difference Result 52380 states and 123468 transitions. [2021-03-10 21:15:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:15:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 21:15:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:50,846 INFO L225 Difference]: With dead ends: 52380 [2021-03-10 21:15:50,846 INFO L226 Difference]: Without dead ends: 52368 [2021-03-10 21:15:50,846 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:15:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52368 states. [2021-03-10 21:15:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52368 to 51650. [2021-03-10 21:15:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51650 states, 51649 states have (on average 2.361807585819667) internal successors, (121985), 51649 states have internal predecessors, (121985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:51,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51650 states to 51650 states and 121985 transitions. [2021-03-10 21:15:51,740 INFO L78 Accepts]: Start accepts. Automaton has 51650 states and 121985 transitions. Word has length 39 [2021-03-10 21:15:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:51,740 INFO L480 AbstractCegarLoop]: Abstraction has 51650 states and 121985 transitions. [2021-03-10 21:15:51,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:51,741 INFO L276 IsEmpty]: Start isEmpty. Operand 51650 states and 121985 transitions. [2021-03-10 21:15:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 21:15:51,759 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:51,759 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:51,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-10 21:15:51,959 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:51,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:51,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1172697878, now seen corresponding path program 104 times [2021-03-10 21:15:51,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:51,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306490997] [2021-03-10 21:15:51,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:51,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306490997] [2021-03-10 21:15:51,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721389915] [2021-03-10 21:15:51,988 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) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:52,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:52,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:52,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:15:52,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:15:52,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:52,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:15:52,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701642810] [2021-03-10 21:15:52,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:15:52,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:52,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:15:52,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:15:52,069 INFO L87 Difference]: Start difference. First operand 51650 states and 121985 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:52,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:52,297 INFO L93 Difference]: Finished difference Result 51895 states and 122112 transitions. [2021-03-10 21:15:52,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:52,297 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 21:15:52,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:52,661 INFO L225 Difference]: With dead ends: 51895 [2021-03-10 21:15:52,661 INFO L226 Difference]: Without dead ends: 51883 [2021-03-10 21:15:52,663 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:15:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51883 states. [2021-03-10 21:15:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51883 to 50789. [2021-03-10 21:15:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50789 states, 50788 states have (on average 2.3598684728676065) internal successors, (119853), 50788 states have internal predecessors, (119853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50789 states to 50789 states and 119853 transitions. [2021-03-10 21:15:53,294 INFO L78 Accepts]: Start accepts. Automaton has 50789 states and 119853 transitions. Word has length 39 [2021-03-10 21:15:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:53,294 INFO L480 AbstractCegarLoop]: Abstraction has 50789 states and 119853 transitions. [2021-03-10 21:15:53,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 50789 states and 119853 transitions. [2021-03-10 21:15:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 21:15:53,313 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:53,313 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:53,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-03-10 21:15:53,515 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:53,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:53,515 INFO L82 PathProgramCache]: Analyzing trace with hash -726293446, now seen corresponding path program 7 times [2021-03-10 21:15:53,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:53,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341963867] [2021-03-10 21:15:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-03-10 21:15:53,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341963867] [2021-03-10 21:15:53,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817473375] [2021-03-10 21:15:53,617 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 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 [2021-03-10 21:15:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:53,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:15:53,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-03-10 21:15:54,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:54,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:15:54,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618179276] [2021-03-10 21:15:54,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:15:54,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:54,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:15:54,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:15:54,014 INFO L87 Difference]: Start difference. First operand 50789 states and 119853 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:54,538 INFO L93 Difference]: Finished difference Result 50941 states and 120174 transitions. [2021-03-10 21:15:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:15:54,539 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-10 21:15:54,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:54,606 INFO L225 Difference]: With dead ends: 50941 [2021-03-10 21:15:54,606 INFO L226 Difference]: Without dead ends: 50818 [2021-03-10 21:15:54,606 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:15:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50818 states. [2021-03-10 21:15:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50818 to 50804. [2021-03-10 21:15:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50804 states, 50803 states have (on average 2.3597622187666083) internal successors, (119883), 50803 states have internal predecessors, (119883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50804 states to 50804 states and 119883 transitions. [2021-03-10 21:15:55,539 INFO L78 Accepts]: Start accepts. Automaton has 50804 states and 119883 transitions. Word has length 40 [2021-03-10 21:15:55,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:55,539 INFO L480 AbstractCegarLoop]: Abstraction has 50804 states and 119883 transitions. [2021-03-10 21:15:55,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:55,539 INFO L276 IsEmpty]: Start isEmpty. Operand 50804 states and 119883 transitions. [2021-03-10 21:15:55,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:15:55,559 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:55,559 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:55,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-10 21:15:55,759 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:55,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1306641550, now seen corresponding path program 105 times [2021-03-10 21:15:55,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:55,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301095599] [2021-03-10 21:15:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:55,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301095599] [2021-03-10 21:15:55,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566852924] [2021-03-10 21:15:55,815 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:55,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:15:55,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:55,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:15:55,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:55,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:55,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 21:15:55,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461532822] [2021-03-10 21:15:55,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:55,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:55,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:55,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:55,963 INFO L87 Difference]: Start difference. First operand 50804 states and 119883 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:56,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:56,339 INFO L93 Difference]: Finished difference Result 54165 states and 126813 transitions. [2021-03-10 21:15:56,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:15:56,340 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:15:56,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:56,408 INFO L225 Difference]: With dead ends: 54165 [2021-03-10 21:15:56,408 INFO L226 Difference]: Without dead ends: 54165 [2021-03-10 21:15:56,409 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:15:56,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54165 states. [2021-03-10 21:15:57,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54165 to 36411. [2021-03-10 21:15:57,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36411 states, 36410 states have (on average 2.3365558912386706) internal successors, (85074), 36410 states have internal predecessors, (85074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36411 states to 36411 states and 85074 transitions. [2021-03-10 21:15:57,093 INFO L78 Accepts]: Start accepts. Automaton has 36411 states and 85074 transitions. Word has length 41 [2021-03-10 21:15:57,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:57,094 INFO L480 AbstractCegarLoop]: Abstraction has 36411 states and 85074 transitions. [2021-03-10 21:15:57,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,094 INFO L276 IsEmpty]: Start isEmpty. Operand 36411 states and 85074 transitions. [2021-03-10 21:15:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 21:15:57,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:57,115 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:57,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-03-10 21:15:57,325 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:57,325 INFO L82 PathProgramCache]: Analyzing trace with hash -106564922, now seen corresponding path program 106 times [2021-03-10 21:15:57,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:57,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648341951] [2021-03-10 21:15:57,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:57,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648341951] [2021-03-10 21:15:57,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190977448] [2021-03-10 21:15:57,375 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 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 [2021-03-10 21:15:57,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:15:57,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:57,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:15:57,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:57,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:57,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 21:15:57,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984442016] [2021-03-10 21:15:57,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:15:57,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:57,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:15:57,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:15:57,517 INFO L87 Difference]: Start difference. First operand 36411 states and 85074 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:57,829 INFO L93 Difference]: Finished difference Result 34622 states and 78133 transitions. [2021-03-10 21:15:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:15:57,830 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 21:15:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:57,866 INFO L225 Difference]: With dead ends: 34622 [2021-03-10 21:15:57,867 INFO L226 Difference]: Without dead ends: 34550 [2021-03-10 21:15:57,867 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:15:57,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2021-03-10 21:15:58,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 32785. [2021-03-10 21:15:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32785 states, 32784 states have (on average 2.226634943875061) internal successors, (72998), 32784 states have internal predecessors, (72998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32785 states to 32785 states and 72998 transitions. [2021-03-10 21:15:58,454 INFO L78 Accepts]: Start accepts. Automaton has 32785 states and 72998 transitions. Word has length 41 [2021-03-10 21:15:58,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:58,454 INFO L480 AbstractCegarLoop]: Abstraction has 32785 states and 72998 transitions. [2021-03-10 21:15:58,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,455 INFO L276 IsEmpty]: Start isEmpty. Operand 32785 states and 72998 transitions. [2021-03-10 21:15:58,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:15:58,472 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:58,472 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:58,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:58,672 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:58,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:58,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1447346081, now seen corresponding path program 107 times [2021-03-10 21:15:58,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:58,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881815822] [2021-03-10 21:15:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:15:58,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881815822] [2021-03-10 21:15:58,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569031605] [2021-03-10 21:15:58,837 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 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 [2021-03-10 21:15:58,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:15:58,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:58,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:15:58,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:15:59,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:59,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-03-10 21:15:59,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898953746] [2021-03-10 21:15:59,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:15:59,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:59,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:15:59,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:15:59,100 INFO L87 Difference]: Start difference. First operand 32785 states and 72998 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:59,926 INFO L93 Difference]: Finished difference Result 33955 states and 75388 transitions. [2021-03-10 21:15:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:15:59,927 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:15:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:59,962 INFO L225 Difference]: With dead ends: 33955 [2021-03-10 21:15:59,962 INFO L226 Difference]: Without dead ends: 33895 [2021-03-10 21:15:59,963 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 578.0ms TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:15:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33895 states. [2021-03-10 21:16:00,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33895 to 33327. [2021-03-10 21:16:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33327 states, 33326 states have (on average 2.2281701974434376) internal successors, (74256), 33326 states have internal predecessors, (74256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33327 states to 33327 states and 74256 transitions. [2021-03-10 21:16:00,520 INFO L78 Accepts]: Start accepts. Automaton has 33327 states and 74256 transitions. Word has length 42 [2021-03-10 21:16:00,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:00,520 INFO L480 AbstractCegarLoop]: Abstraction has 33327 states and 74256 transitions. [2021-03-10 21:16:00,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:00,520 INFO L276 IsEmpty]: Start isEmpty. Operand 33327 states and 74256 transitions. [2021-03-10 21:16:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:00,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:00,538 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:00,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-03-10 21:16:00,738 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:00,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:00,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1017666921, now seen corresponding path program 108 times [2021-03-10 21:16:00,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:00,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29231782] [2021-03-10 21:16:00,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:00,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29231782] [2021-03-10 21:16:00,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095469154] [2021-03-10 21:16:00,899 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 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 [2021-03-10 21:16:00,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:16:00,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:00,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:00,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:01,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:01,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-03-10 21:16:01,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790835935] [2021-03-10 21:16:01,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:16:01,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:01,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:16:01,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:01,187 INFO L87 Difference]: Start difference. First operand 33327 states and 74256 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:01,919 INFO L93 Difference]: Finished difference Result 34237 states and 76081 transitions. [2021-03-10 21:16:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:16:01,920 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:01,957 INFO L225 Difference]: With dead ends: 34237 [2021-03-10 21:16:01,957 INFO L226 Difference]: Without dead ends: 34177 [2021-03-10 21:16:01,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 645.8ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:16:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34177 states. [2021-03-10 21:16:02,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34177 to 33689. [2021-03-10 21:16:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33689 states, 33688 states have (on average 2.2294585609118975) internal successors, (75106), 33688 states have internal predecessors, (75106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:02,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33689 states to 33689 states and 75106 transitions. [2021-03-10 21:16:02,482 INFO L78 Accepts]: Start accepts. Automaton has 33689 states and 75106 transitions. Word has length 42 [2021-03-10 21:16:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:02,482 INFO L480 AbstractCegarLoop]: Abstraction has 33689 states and 75106 transitions. [2021-03-10 21:16:02,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand 33689 states and 75106 transitions. [2021-03-10 21:16:02,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:02,499 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:02,499 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:02,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:02,701 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:02,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:02,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1450512479, now seen corresponding path program 109 times [2021-03-10 21:16:02,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:02,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850071813] [2021-03-10 21:16:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:02,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850071813] [2021-03-10 21:16:02,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261091887] [2021-03-10 21:16:02,846 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 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 [2021-03-10 21:16:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:02,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:02,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:03,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:03,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-03-10 21:16:03,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942096677] [2021-03-10 21:16:03,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:16:03,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:03,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:16:03,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:03,095 INFO L87 Difference]: Start difference. First operand 33689 states and 75106 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:03,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:03,824 INFO L93 Difference]: Finished difference Result 35020 states and 77856 transitions. [2021-03-10 21:16:03,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:16:03,824 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:03,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:03,861 INFO L225 Difference]: With dead ends: 35020 [2021-03-10 21:16:03,862 INFO L226 Difference]: Without dead ends: 34968 [2021-03-10 21:16:03,862 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 560.9ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:16:03,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34968 states. [2021-03-10 21:16:04,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34968 to 33824. [2021-03-10 21:16:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33824 states, 33823 states have (on average 2.2299618602725957) internal successors, (75424), 33823 states have internal predecessors, (75424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33824 states to 33824 states and 75424 transitions. [2021-03-10 21:16:04,386 INFO L78 Accepts]: Start accepts. Automaton has 33824 states and 75424 transitions. Word has length 42 [2021-03-10 21:16:04,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:04,386 INFO L480 AbstractCegarLoop]: Abstraction has 33824 states and 75424 transitions. [2021-03-10 21:16:04,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand 33824 states and 75424 transitions. [2021-03-10 21:16:04,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:04,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:04,402 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:04,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:04,602 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:04,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:04,603 INFO L82 PathProgramCache]: Analyzing trace with hash 188289943, now seen corresponding path program 110 times [2021-03-10 21:16:04,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:04,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239241996] [2021-03-10 21:16:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:04,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239241996] [2021-03-10 21:16:04,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147017109] [2021-03-10 21:16:04,744 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 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 [2021-03-10 21:16:04,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:04,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:04,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:04,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:05,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:05,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-03-10 21:16:05,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024692935] [2021-03-10 21:16:05,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:16:05,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:05,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:16:05,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:05,012 INFO L87 Difference]: Start difference. First operand 33824 states and 75424 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:05,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:05,554 INFO L93 Difference]: Finished difference Result 35348 states and 78730 transitions. [2021-03-10 21:16:05,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:05,555 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:05,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:05,592 INFO L225 Difference]: With dead ends: 35348 [2021-03-10 21:16:05,593 INFO L226 Difference]: Without dead ends: 35287 [2021-03-10 21:16:05,593 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 442.9ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:16:05,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35287 states. [2021-03-10 21:16:06,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35287 to 34771. [2021-03-10 21:16:06,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34771 states, 34770 states have (on average 2.23264308311763) internal successors, (77629), 34770 states have internal predecessors, (77629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34771 states to 34771 states and 77629 transitions. [2021-03-10 21:16:06,139 INFO L78 Accepts]: Start accepts. Automaton has 34771 states and 77629 transitions. Word has length 42 [2021-03-10 21:16:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:06,139 INFO L480 AbstractCegarLoop]: Abstraction has 34771 states and 77629 transitions. [2021-03-10 21:16:06,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:06,139 INFO L276 IsEmpty]: Start isEmpty. Operand 34771 states and 77629 transitions. [2021-03-10 21:16:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:06,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:06,156 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:06,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-03-10 21:16:06,357 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:06,357 INFO L82 PathProgramCache]: Analyzing trace with hash -2091270305, now seen corresponding path program 111 times [2021-03-10 21:16:06,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:06,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158844337] [2021-03-10 21:16:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:06,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158844337] [2021-03-10 21:16:06,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501559519] [2021-03-10 21:16:06,501 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:06,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:16:06,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:06,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:06,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:06,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:06,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-03-10 21:16:06,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685702019] [2021-03-10 21:16:06,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:16:06,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:06,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:16:06,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:06,787 INFO L87 Difference]: Start difference. First operand 34771 states and 77629 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:07,536 INFO L93 Difference]: Finished difference Result 37628 states and 83716 transitions. [2021-03-10 21:16:07,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:16:07,536 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:07,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:07,576 INFO L225 Difference]: With dead ends: 37628 [2021-03-10 21:16:07,576 INFO L226 Difference]: Without dead ends: 37564 [2021-03-10 21:16:07,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 563.8ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:16:07,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37564 states. [2021-03-10 21:16:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37564 to 36693. [2021-03-10 21:16:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36693 states, 36692 states have (on average 2.234928594789055) internal successors, (82004), 36692 states have internal predecessors, (82004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36693 states to 36693 states and 82004 transitions. [2021-03-10 21:16:08,167 INFO L78 Accepts]: Start accepts. Automaton has 36693 states and 82004 transitions. Word has length 42 [2021-03-10 21:16:08,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:08,167 INFO L480 AbstractCegarLoop]: Abstraction has 36693 states and 82004 transitions. [2021-03-10 21:16:08,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:08,167 INFO L276 IsEmpty]: Start isEmpty. Operand 36693 states and 82004 transitions. [2021-03-10 21:16:08,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:08,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:08,186 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:08,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:08,387 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:08,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:08,388 INFO L82 PathProgramCache]: Analyzing trace with hash -52672187, now seen corresponding path program 112 times [2021-03-10 21:16:08,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:08,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42284520] [2021-03-10 21:16:08,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:08,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42284520] [2021-03-10 21:16:08,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062846043] [2021-03-10 21:16:08,543 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 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 [2021-03-10 21:16:08,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:08,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:08,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:08,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:08,791 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:08,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:08,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-03-10 21:16:08,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994119110] [2021-03-10 21:16:08,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:16:08,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:08,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:16:08,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:08,792 INFO L87 Difference]: Start difference. First operand 36693 states and 82004 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:09,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:09,479 INFO L93 Difference]: Finished difference Result 37468 states and 83561 transitions. [2021-03-10 21:16:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:16:09,480 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:09,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:09,519 INFO L225 Difference]: With dead ends: 37468 [2021-03-10 21:16:09,520 INFO L226 Difference]: Without dead ends: 37424 [2021-03-10 21:16:09,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 541.9ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:16:09,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37424 states. [2021-03-10 21:16:10,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37424 to 36988. [2021-03-10 21:16:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36988 states, 36987 states have (on average 2.2359207289047505) internal successors, (82700), 36987 states have internal predecessors, (82700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36988 states to 36988 states and 82700 transitions. [2021-03-10 21:16:10,092 INFO L78 Accepts]: Start accepts. Automaton has 36988 states and 82700 transitions. Word has length 42 [2021-03-10 21:16:10,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:10,092 INFO L480 AbstractCegarLoop]: Abstraction has 36988 states and 82700 transitions. [2021-03-10 21:16:10,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:10,092 INFO L276 IsEmpty]: Start isEmpty. Operand 36988 states and 82700 transitions. [2021-03-10 21:16:10,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:10,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:10,115 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:10,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:10,315 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:10,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:10,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1631758035, now seen corresponding path program 113 times [2021-03-10 21:16:10,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:10,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727275502] [2021-03-10 21:16:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:10,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727275502] [2021-03-10 21:16:10,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491270612] [2021-03-10 21:16:10,468 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:10,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:16:10,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:10,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:10,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:10,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:10,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-03-10 21:16:10,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811649282] [2021-03-10 21:16:10,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:16:10,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:10,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:16:10,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:10,746 INFO L87 Difference]: Start difference. First operand 36988 states and 82700 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:11,574 INFO L93 Difference]: Finished difference Result 37883 states and 84505 transitions. [2021-03-10 21:16:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:16:11,575 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:11,620 INFO L225 Difference]: With dead ends: 37883 [2021-03-10 21:16:11,620 INFO L226 Difference]: Without dead ends: 37825 [2021-03-10 21:16:11,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 649.5ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:16:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37825 states. [2021-03-10 21:16:12,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37825 to 37336. [2021-03-10 21:16:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37336 states, 37335 states have (on average 2.2370162046337216) internal successors, (83519), 37335 states have internal predecessors, (83519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:12,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37336 states to 37336 states and 83519 transitions. [2021-03-10 21:16:12,157 INFO L78 Accepts]: Start accepts. Automaton has 37336 states and 83519 transitions. Word has length 42 [2021-03-10 21:16:12,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:12,158 INFO L480 AbstractCegarLoop]: Abstraction has 37336 states and 83519 transitions. [2021-03-10 21:16:12,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:12,158 INFO L276 IsEmpty]: Start isEmpty. Operand 37336 states and 83519 transitions. [2021-03-10 21:16:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:12,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:12,176 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:12,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-03-10 21:16:12,377 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:12,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:12,377 INFO L82 PathProgramCache]: Analyzing trace with hash 836421365, now seen corresponding path program 114 times [2021-03-10 21:16:12,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:12,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288810572] [2021-03-10 21:16:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:12,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288810572] [2021-03-10 21:16:12,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658953499] [2021-03-10 21:16:12,538 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 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 [2021-03-10 21:16:12,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:16:12,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:12,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:12,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:12,812 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:12,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:12,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-03-10 21:16:12,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333902144] [2021-03-10 21:16:12,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:16:12,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:12,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:16:12,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:12,813 INFO L87 Difference]: Start difference. First operand 37336 states and 83519 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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) [2021-03-10 21:16:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:13,926 INFO L93 Difference]: Finished difference Result 42560 states and 95111 transitions. [2021-03-10 21:16:13,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:16:13,927 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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) Word has length 42 [2021-03-10 21:16:13,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:13,968 INFO L225 Difference]: With dead ends: 42560 [2021-03-10 21:16:13,968 INFO L226 Difference]: Without dead ends: 42505 [2021-03-10 21:16:13,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:16:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42505 states. [2021-03-10 21:16:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42505 to 41364. [2021-03-10 21:16:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41364 states, 41363 states have (on average 2.2458477383168534) internal successors, (92895), 41363 states have internal predecessors, (92895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41364 states to 41364 states and 92895 transitions. [2021-03-10 21:16:14,411 INFO L78 Accepts]: Start accepts. Automaton has 41364 states and 92895 transitions. Word has length 42 [2021-03-10 21:16:14,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:14,411 INFO L480 AbstractCegarLoop]: Abstraction has 41364 states and 92895 transitions. [2021-03-10 21:16:14,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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) [2021-03-10 21:16:14,411 INFO L276 IsEmpty]: Start isEmpty. Operand 41364 states and 92895 transitions. [2021-03-10 21:16:14,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:14,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:14,429 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:14,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:14,630 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:14,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:14,630 INFO L82 PathProgramCache]: Analyzing trace with hash -425801171, now seen corresponding path program 115 times [2021-03-10 21:16:14,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:14,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070131700] [2021-03-10 21:16:14,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:14,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070131700] [2021-03-10 21:16:14,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094027203] [2021-03-10 21:16:14,779 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 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 [2021-03-10 21:16:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:14,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:14,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:15,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:15,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-03-10 21:16:15,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416848968] [2021-03-10 21:16:15,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:16:15,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:15,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:16:15,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:15,079 INFO L87 Difference]: Start difference. First operand 41364 states and 92895 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:15,735 INFO L93 Difference]: Finished difference Result 42177 states and 94600 transitions. [2021-03-10 21:16:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:16:15,736 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:15,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:15,781 INFO L225 Difference]: With dead ends: 42177 [2021-03-10 21:16:15,781 INFO L226 Difference]: Without dead ends: 42122 [2021-03-10 21:16:15,781 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:16:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42122 states. [2021-03-10 21:16:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42122 to 41392. [2021-03-10 21:16:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41392 states, 41391 states have (on average 2.2448599937184412) internal successors, (92917), 41391 states have internal predecessors, (92917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41392 states to 41392 states and 92917 transitions. [2021-03-10 21:16:16,233 INFO L78 Accepts]: Start accepts. Automaton has 41392 states and 92917 transitions. Word has length 42 [2021-03-10 21:16:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:16,233 INFO L480 AbstractCegarLoop]: Abstraction has 41392 states and 92917 transitions. [2021-03-10 21:16:16,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 41392 states and 92917 transitions. [2021-03-10 21:16:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:16,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:16,252 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:16,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-10 21:16:16,453 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash 322148699, now seen corresponding path program 116 times [2021-03-10 21:16:16,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:16,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972872740] [2021-03-10 21:16:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:16,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972872740] [2021-03-10 21:16:16,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931368500] [2021-03-10 21:16:16,638 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 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 [2021-03-10 21:16:16,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:16,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:16,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:16,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:17,084 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-03-10 21:16:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:17,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:17,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-03-10 21:16:17,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722049774] [2021-03-10 21:16:17,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:16:17,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:17,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:16:17,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:17,092 INFO L87 Difference]: Start difference. First operand 41392 states and 92917 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:17,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:17,736 INFO L93 Difference]: Finished difference Result 43200 states and 96836 transitions. [2021-03-10 21:16:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:17,737 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:17,784 INFO L225 Difference]: With dead ends: 43200 [2021-03-10 21:16:17,784 INFO L226 Difference]: Without dead ends: 43139 [2021-03-10 21:16:17,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 530.2ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:16:17,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43139 states. [2021-03-10 21:16:18,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43139 to 42274. [2021-03-10 21:16:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42274 states, 42273 states have (on average 2.245641425969295) internal successors, (94930), 42273 states have internal predecessors, (94930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:18,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42274 states to 42274 states and 94930 transitions. [2021-03-10 21:16:18,238 INFO L78 Accepts]: Start accepts. Automaton has 42274 states and 94930 transitions. Word has length 42 [2021-03-10 21:16:18,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:18,238 INFO L480 AbstractCegarLoop]: Abstraction has 42274 states and 94930 transitions. [2021-03-10 21:16:18,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:18,238 INFO L276 IsEmpty]: Start isEmpty. Operand 42274 states and 94930 transitions. [2021-03-10 21:16:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:18,257 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:18,257 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:18,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:18,463 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:18,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:18,463 INFO L82 PathProgramCache]: Analyzing trace with hash -709466537, now seen corresponding path program 117 times [2021-03-10 21:16:18,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:18,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878203052] [2021-03-10 21:16:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:18,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878203052] [2021-03-10 21:16:18,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568089587] [2021-03-10 21:16:18,781 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 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 [2021-03-10 21:16:18,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:16:18,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:18,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:18,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:19,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:19,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-03-10 21:16:19,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576053353] [2021-03-10 21:16:19,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:16:19,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:19,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:16:19,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:19,136 INFO L87 Difference]: Start difference. First operand 42274 states and 94930 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:20,138 INFO L93 Difference]: Finished difference Result 43593 states and 97722 transitions. [2021-03-10 21:16:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:16:20,139 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:20,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:20,192 INFO L225 Difference]: With dead ends: 43593 [2021-03-10 21:16:20,192 INFO L226 Difference]: Without dead ends: 43522 [2021-03-10 21:16:20,192 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 877.8ms TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:16:20,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43522 states. [2021-03-10 21:16:20,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43522 to 42894. [2021-03-10 21:16:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42894 states, 42893 states have (on average 2.2458443102604155) internal successors, (96331), 42893 states have internal predecessors, (96331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42894 states to 42894 states and 96331 transitions. [2021-03-10 21:16:20,840 INFO L78 Accepts]: Start accepts. Automaton has 42894 states and 96331 transitions. Word has length 42 [2021-03-10 21:16:20,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:20,840 INFO L480 AbstractCegarLoop]: Abstraction has 42894 states and 96331 transitions. [2021-03-10 21:16:20,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:20,840 INFO L276 IsEmpty]: Start isEmpty. Operand 42894 states and 96331 transitions. [2021-03-10 21:16:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:20,861 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:20,861 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:21,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-03-10 21:16:21,063 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:21,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:21,064 INFO L82 PathProgramCache]: Analyzing trace with hash 43717975, now seen corresponding path program 118 times [2021-03-10 21:16:21,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:21,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582687980] [2021-03-10 21:16:21,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:21,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582687980] [2021-03-10 21:16:21,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933486862] [2021-03-10 21:16:21,207 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 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 [2021-03-10 21:16:21,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:21,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:21,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:21,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:21,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:21,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-03-10 21:16:21,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773816275] [2021-03-10 21:16:21,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:16:21,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:21,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:16:21,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:21,506 INFO L87 Difference]: Start difference. First operand 42894 states and 96331 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:22,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:22,230 INFO L93 Difference]: Finished difference Result 44838 states and 100520 transitions. [2021-03-10 21:16:22,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:22,231 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:22,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:22,281 INFO L225 Difference]: With dead ends: 44838 [2021-03-10 21:16:22,281 INFO L226 Difference]: Without dead ends: 44755 [2021-03-10 21:16:22,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 580.8ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:16:22,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44755 states. [2021-03-10 21:16:22,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44755 to 42260. [2021-03-10 21:16:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42260 states, 42259 states have (on average 2.245367850635368) internal successors, (94887), 42259 states have internal predecessors, (94887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42260 states to 42260 states and 94887 transitions. [2021-03-10 21:16:22,851 INFO L78 Accepts]: Start accepts. Automaton has 42260 states and 94887 transitions. Word has length 42 [2021-03-10 21:16:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:22,851 INFO L480 AbstractCegarLoop]: Abstraction has 42260 states and 94887 transitions. [2021-03-10 21:16:22,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 42260 states and 94887 transitions. [2021-03-10 21:16:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:22,872 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:22,872 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:23,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:23,073 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:23,073 INFO L82 PathProgramCache]: Analyzing trace with hash -764997097, now seen corresponding path program 119 times [2021-03-10 21:16:23,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:23,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925960074] [2021-03-10 21:16:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:23,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925960074] [2021-03-10 21:16:23,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441482532] [2021-03-10 21:16:23,226 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 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 [2021-03-10 21:16:23,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:16:23,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:23,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:23,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:23,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:23,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-03-10 21:16:23,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130693570] [2021-03-10 21:16:23,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:16:23,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:23,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:16:23,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:23,535 INFO L87 Difference]: Start difference. First operand 42260 states and 94887 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:24,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:24,208 INFO L93 Difference]: Finished difference Result 45004 states and 100851 transitions. [2021-03-10 21:16:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:16:24,209 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:24,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:24,260 INFO L225 Difference]: With dead ends: 45004 [2021-03-10 21:16:24,260 INFO L226 Difference]: Without dead ends: 44951 [2021-03-10 21:16:24,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 523.9ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:16:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44951 states. [2021-03-10 21:16:24,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44951 to 44047. [2021-03-10 21:16:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44047 states, 44046 states have (on average 2.2477182945102845) internal successors, (99003), 44046 states have internal predecessors, (99003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44047 states to 44047 states and 99003 transitions. [2021-03-10 21:16:24,918 INFO L78 Accepts]: Start accepts. Automaton has 44047 states and 99003 transitions. Word has length 42 [2021-03-10 21:16:24,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:24,918 INFO L480 AbstractCegarLoop]: Abstraction has 44047 states and 99003 transitions. [2021-03-10 21:16:24,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand 44047 states and 99003 transitions. [2021-03-10 21:16:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:24,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:24,938 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:25,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-03-10 21:16:25,139 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:25,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2001638735, now seen corresponding path program 120 times [2021-03-10 21:16:25,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:25,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085147445] [2021-03-10 21:16:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:25,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085147445] [2021-03-10 21:16:25,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535956196] [2021-03-10 21:16:25,329 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 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 [2021-03-10 21:16:25,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:16:25,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:25,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:25,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:25,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:25,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-03-10 21:16:25,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007226267] [2021-03-10 21:16:25,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:16:25,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:25,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:16:25,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:25,676 INFO L87 Difference]: Start difference. First operand 44047 states and 99003 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:26,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:26,762 INFO L93 Difference]: Finished difference Result 47479 states and 106568 transitions. [2021-03-10 21:16:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:16:26,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:26,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:26,815 INFO L225 Difference]: With dead ends: 47479 [2021-03-10 21:16:26,815 INFO L226 Difference]: Without dead ends: 47408 [2021-03-10 21:16:26,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 608.9ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:16:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47408 states. [2021-03-10 21:16:27,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47408 to 43786. [2021-03-10 21:16:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43786 states, 43785 states have (on average 2.247847436336645) internal successors, (98422), 43785 states have internal predecessors, (98422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43786 states to 43786 states and 98422 transitions. [2021-03-10 21:16:27,291 INFO L78 Accepts]: Start accepts. Automaton has 43786 states and 98422 transitions. Word has length 42 [2021-03-10 21:16:27,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:27,291 INFO L480 AbstractCegarLoop]: Abstraction has 43786 states and 98422 transitions. [2021-03-10 21:16:27,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:27,291 INFO L276 IsEmpty]: Start isEmpty. Operand 43786 states and 98422 transitions. [2021-03-10 21:16:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:27,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:27,311 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:27,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:27,511 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:27,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:27,511 INFO L82 PathProgramCache]: Analyzing trace with hash 540545751, now seen corresponding path program 121 times [2021-03-10 21:16:27,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:27,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734060342] [2021-03-10 21:16:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:27,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734060342] [2021-03-10 21:16:27,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441928490] [2021-03-10 21:16:27,658 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 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 [2021-03-10 21:16:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:27,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:27,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:27,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:27,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-03-10 21:16:27,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900570687] [2021-03-10 21:16:27,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:16:27,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:27,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:16:27,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:27,909 INFO L87 Difference]: Start difference. First operand 43786 states and 98422 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:28,762 INFO L93 Difference]: Finished difference Result 44309 states and 99482 transitions. [2021-03-10 21:16:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:16:28,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:28,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:28,809 INFO L225 Difference]: With dead ends: 44309 [2021-03-10 21:16:28,809 INFO L226 Difference]: Without dead ends: 44269 [2021-03-10 21:16:28,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 494.3ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:16:28,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44269 states. [2021-03-10 21:16:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44269 to 44009. [2021-03-10 21:16:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44009 states, 44008 states have (on average 2.2482957644064716) internal successors, (98943), 44008 states have internal predecessors, (98943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44009 states to 44009 states and 98943 transitions. [2021-03-10 21:16:29,339 INFO L78 Accepts]: Start accepts. Automaton has 44009 states and 98943 transitions. Word has length 42 [2021-03-10 21:16:29,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:29,339 INFO L480 AbstractCegarLoop]: Abstraction has 44009 states and 98943 transitions. [2021-03-10 21:16:29,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand 44009 states and 98943 transitions. [2021-03-10 21:16:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:29,361 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:29,361 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:29,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:29,561 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:29,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:29,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1746502615, now seen corresponding path program 122 times [2021-03-10 21:16:29,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:29,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095422488] [2021-03-10 21:16:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:29,884 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-03-10 21:16:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:29,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095422488] [2021-03-10 21:16:29,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809774052] [2021-03-10 21:16:29,926 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 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 [2021-03-10 21:16:29,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:29,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:29,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:29,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:30,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:30,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-03-10 21:16:30,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136992892] [2021-03-10 21:16:30,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:16:30,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:30,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:16:30,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:30,258 INFO L87 Difference]: Start difference. First operand 44009 states and 98943 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:30,927 INFO L93 Difference]: Finished difference Result 44985 states and 100996 transitions. [2021-03-10 21:16:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:30,928 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:30,979 INFO L225 Difference]: With dead ends: 44985 [2021-03-10 21:16:30,980 INFO L226 Difference]: Without dead ends: 44934 [2021-03-10 21:16:30,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 757.1ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:16:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44934 states. [2021-03-10 21:16:31,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44934 to 44309. [2021-03-10 21:16:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44309 states, 44308 states have (on average 2.248081610544371) internal successors, (99608), 44308 states have internal predecessors, (99608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44309 states to 44309 states and 99608 transitions. [2021-03-10 21:16:31,711 INFO L78 Accepts]: Start accepts. Automaton has 44309 states and 99608 transitions. Word has length 42 [2021-03-10 21:16:31,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:31,712 INFO L480 AbstractCegarLoop]: Abstraction has 44309 states and 99608 transitions. [2021-03-10 21:16:31,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 44309 states and 99608 transitions. [2021-03-10 21:16:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:31,733 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:31,733 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:31,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:31,934 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:31,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:31,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1800514811, now seen corresponding path program 123 times [2021-03-10 21:16:31,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:31,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321619200] [2021-03-10 21:16:31,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:32,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321619200] [2021-03-10 21:16:32,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382524646] [2021-03-10 21:16:32,079 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 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 [2021-03-10 21:16:32,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:16:32,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:32,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:32,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:32,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:32,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-03-10 21:16:32,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093060910] [2021-03-10 21:16:32,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:16:32,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:32,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:16:32,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:32,375 INFO L87 Difference]: Start difference. First operand 44309 states and 99608 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:33,475 INFO L93 Difference]: Finished difference Result 49164 states and 110220 transitions. [2021-03-10 21:16:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:16:33,475 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:33,529 INFO L225 Difference]: With dead ends: 49164 [2021-03-10 21:16:33,530 INFO L226 Difference]: Without dead ends: 49079 [2021-03-10 21:16:33,530 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 575.8ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:16:33,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49079 states. [2021-03-10 21:16:34,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49079 to 47944. [2021-03-10 21:16:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47944 states, 47943 states have (on average 2.2517990113259496) internal successors, (107958), 47943 states have internal predecessors, (107958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47944 states to 47944 states and 107958 transitions. [2021-03-10 21:16:34,226 INFO L78 Accepts]: Start accepts. Automaton has 47944 states and 107958 transitions. Word has length 42 [2021-03-10 21:16:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:34,226 INFO L480 AbstractCegarLoop]: Abstraction has 47944 states and 107958 transitions. [2021-03-10 21:16:34,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 47944 states and 107958 transitions. [2021-03-10 21:16:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:34,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:34,252 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:34,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-03-10 21:16:34,453 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:34,453 INFO L82 PathProgramCache]: Analyzing trace with hash 200614713, now seen corresponding path program 124 times [2021-03-10 21:16:34,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:34,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221265593] [2021-03-10 21:16:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:34,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221265593] [2021-03-10 21:16:34,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657565415] [2021-03-10 21:16:34,598 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 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 [2021-03-10 21:16:34,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:34,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:34,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:34,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:34,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:34,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-03-10 21:16:34,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589550704] [2021-03-10 21:16:34,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:16:34,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:34,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:16:34,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:34,882 INFO L87 Difference]: Start difference. First operand 47944 states and 107958 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:35,562 INFO L93 Difference]: Finished difference Result 48735 states and 109617 transitions. [2021-03-10 21:16:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:16:35,563 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:35,614 INFO L225 Difference]: With dead ends: 48735 [2021-03-10 21:16:35,614 INFO L226 Difference]: Without dead ends: 48700 [2021-03-10 21:16:35,615 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 600.1ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:16:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48700 states. [2021-03-10 21:16:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48700 to 47968. [2021-03-10 21:16:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47968 states, 47967 states have (on average 2.2517355682031397) internal successors, (108009), 47967 states have internal predecessors, (108009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47968 states to 47968 states and 108009 transitions. [2021-03-10 21:16:36,285 INFO L78 Accepts]: Start accepts. Automaton has 47968 states and 108009 transitions. Word has length 42 [2021-03-10 21:16:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:36,286 INFO L480 AbstractCegarLoop]: Abstraction has 47968 states and 108009 transitions. [2021-03-10 21:16:36,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:36,286 INFO L276 IsEmpty]: Start isEmpty. Operand 47968 states and 108009 transitions. [2021-03-10 21:16:36,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:36,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:36,310 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:36,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-10 21:16:36,511 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:36,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:36,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1810152655, now seen corresponding path program 125 times [2021-03-10 21:16:36,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:36,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890173839] [2021-03-10 21:16:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:36,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890173839] [2021-03-10 21:16:36,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637590947] [2021-03-10 21:16:36,652 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 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 [2021-03-10 21:16:36,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:16:36,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:36,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:36,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:36,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:36,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-03-10 21:16:36,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787405052] [2021-03-10 21:16:36,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:16:36,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:36,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:16:36,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:36,926 INFO L87 Difference]: Start difference. First operand 47968 states and 108009 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:37,748 INFO L93 Difference]: Finished difference Result 51644 states and 116036 transitions. [2021-03-10 21:16:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:16:37,749 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:37,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:37,807 INFO L225 Difference]: With dead ends: 51644 [2021-03-10 21:16:37,807 INFO L226 Difference]: Without dead ends: 51544 [2021-03-10 21:16:37,807 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:16:37,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51544 states. [2021-03-10 21:16:38,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51544 to 49010. [2021-03-10 21:16:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49010 states, 49009 states have (on average 2.252402619926952) internal successors, (110388), 49009 states have internal predecessors, (110388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49010 states to 49010 states and 110388 transitions. [2021-03-10 21:16:38,336 INFO L78 Accepts]: Start accepts. Automaton has 49010 states and 110388 transitions. Word has length 42 [2021-03-10 21:16:38,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:38,336 INFO L480 AbstractCegarLoop]: Abstraction has 49010 states and 110388 transitions. [2021-03-10 21:16:38,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:38,336 INFO L276 IsEmpty]: Start isEmpty. Operand 49010 states and 110388 transitions. [2021-03-10 21:16:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:38,361 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:38,361 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:38,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-10 21:16:38,561 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:38,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1407306689, now seen corresponding path program 126 times [2021-03-10 21:16:38,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:38,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123371731] [2021-03-10 21:16:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:38,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123371731] [2021-03-10 21:16:38,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060428069] [2021-03-10 21:16:38,736 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 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 [2021-03-10 21:16:38,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:16:38,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:38,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:38,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:39,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:39,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-03-10 21:16:39,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656933914] [2021-03-10 21:16:39,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:16:39,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:39,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:16:39,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:39,235 INFO L87 Difference]: Start difference. First operand 49010 states and 110388 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:39,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:39,996 INFO L93 Difference]: Finished difference Result 50673 states and 113916 transitions. [2021-03-10 21:16:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:16:39,997 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:39,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:40,057 INFO L225 Difference]: With dead ends: 50673 [2021-03-10 21:16:40,057 INFO L226 Difference]: Without dead ends: 50620 [2021-03-10 21:16:40,057 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 794.7ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:16:40,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50620 states. [2021-03-10 21:16:40,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50620 to 50130. [2021-03-10 21:16:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50130 states, 50129 states have (on average 2.2520497117437013) internal successors, (112893), 50129 states have internal predecessors, (112893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50130 states to 50130 states and 112893 transitions. [2021-03-10 21:16:40,809 INFO L78 Accepts]: Start accepts. Automaton has 50130 states and 112893 transitions. Word has length 42 [2021-03-10 21:16:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:40,809 INFO L480 AbstractCegarLoop]: Abstraction has 50130 states and 112893 transitions. [2021-03-10 21:16:40,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:40,809 INFO L276 IsEmpty]: Start isEmpty. Operand 50130 states and 112893 transitions. [2021-03-10 21:16:40,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:40,835 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:40,836 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:41,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-03-10 21:16:41,036 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1844741997, now seen corresponding path program 127 times [2021-03-10 21:16:41,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:41,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836377263] [2021-03-10 21:16:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:41,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836377263] [2021-03-10 21:16:41,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650471821] [2021-03-10 21:16:41,191 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 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 [2021-03-10 21:16:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:41,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:41,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:41,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:41,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-03-10 21:16:41,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781895560] [2021-03-10 21:16:41,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:16:41,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:41,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:16:41,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:41,479 INFO L87 Difference]: Start difference. First operand 50130 states and 112893 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:42,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:42,185 INFO L93 Difference]: Finished difference Result 50981 states and 114695 transitions. [2021-03-10 21:16:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:16:42,185 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:42,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:42,250 INFO L225 Difference]: With dead ends: 50981 [2021-03-10 21:16:42,250 INFO L226 Difference]: Without dead ends: 50938 [2021-03-10 21:16:42,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 557.3ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:16:42,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50938 states. [2021-03-10 21:16:42,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50938 to 50107. [2021-03-10 21:16:42,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50107 states, 50106 states have (on average 2.252165409332216) internal successors, (112847), 50106 states have internal predecessors, (112847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50107 states to 50107 states and 112847 transitions. [2021-03-10 21:16:42,975 INFO L78 Accepts]: Start accepts. Automaton has 50107 states and 112847 transitions. Word has length 42 [2021-03-10 21:16:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:42,975 INFO L480 AbstractCegarLoop]: Abstraction has 50107 states and 112847 transitions. [2021-03-10 21:16:42,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 50107 states and 112847 transitions. [2021-03-10 21:16:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:43,001 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:43,001 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:43,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-03-10 21:16:43,201 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:43,201 INFO L82 PathProgramCache]: Analyzing trace with hash -581214207, now seen corresponding path program 128 times [2021-03-10 21:16:43,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:43,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26016286] [2021-03-10 21:16:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:43,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26016286] [2021-03-10 21:16:43,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331898820] [2021-03-10 21:16:43,351 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 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 [2021-03-10 21:16:43,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:43,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:43,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:43,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:43,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:43,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-03-10 21:16:43,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676341983] [2021-03-10 21:16:43,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:16:43,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:43,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:16:43,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:43,614 INFO L87 Difference]: Start difference. First operand 50107 states and 112847 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:44,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:44,370 INFO L93 Difference]: Finished difference Result 50602 states and 113853 transitions. [2021-03-10 21:16:44,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:16:44,371 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:44,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:44,428 INFO L225 Difference]: With dead ends: 50602 [2021-03-10 21:16:44,429 INFO L226 Difference]: Without dead ends: 50562 [2021-03-10 21:16:44,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 550.5ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:16:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50562 states. [2021-03-10 21:16:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50562 to 50341. [2021-03-10 21:16:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50341 states, 50340 states have (on average 2.252522844656337) internal successors, (113392), 50340 states have internal predecessors, (113392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50341 states to 50341 states and 113392 transitions. [2021-03-10 21:16:45,181 INFO L78 Accepts]: Start accepts. Automaton has 50341 states and 113392 transitions. Word has length 42 [2021-03-10 21:16:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:45,181 INFO L480 AbstractCegarLoop]: Abstraction has 50341 states and 113392 transitions. [2021-03-10 21:16:45,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 50341 states and 113392 transitions. [2021-03-10 21:16:45,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:45,207 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:45,207 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:45,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:45,407 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:45,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:45,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1444303521, now seen corresponding path program 129 times [2021-03-10 21:16:45,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:45,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038354181] [2021-03-10 21:16:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:45,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038354181] [2021-03-10 21:16:45,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607723029] [2021-03-10 21:16:45,570 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 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 [2021-03-10 21:16:45,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:16:45,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:45,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:45,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:45,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:45,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-03-10 21:16:45,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163679225] [2021-03-10 21:16:45,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:16:45,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:45,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:16:45,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:16:45,874 INFO L87 Difference]: Start difference. First operand 50341 states and 113392 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:46,514 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-03-10 21:16:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:47,297 INFO L93 Difference]: Finished difference Result 54084 states and 121478 transitions. [2021-03-10 21:16:47,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:16:47,298 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:47,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:47,360 INFO L225 Difference]: With dead ends: 54084 [2021-03-10 21:16:47,360 INFO L226 Difference]: Without dead ends: 54013 [2021-03-10 21:16:47,360 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1056.7ms TimeCoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:16:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54013 states. [2021-03-10 21:16:48,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54013 to 53169. [2021-03-10 21:16:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53169 states, 53168 states have (on average 2.254043785735781) internal successors, (119843), 53168 states have internal predecessors, (119843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53169 states to 53169 states and 119843 transitions. [2021-03-10 21:16:48,170 INFO L78 Accepts]: Start accepts. Automaton has 53169 states and 119843 transitions. Word has length 42 [2021-03-10 21:16:48,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:48,170 INFO L480 AbstractCegarLoop]: Abstraction has 53169 states and 119843 transitions. [2021-03-10 21:16:48,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 53169 states and 119843 transitions. [2021-03-10 21:16:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:48,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:48,197 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:48,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-03-10 21:16:48,398 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:48,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:48,398 INFO L82 PathProgramCache]: Analyzing trace with hash 29410071, now seen corresponding path program 130 times [2021-03-10 21:16:48,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:48,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490847106] [2021-03-10 21:16:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:48,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490847106] [2021-03-10 21:16:48,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706825200] [2021-03-10 21:16:48,529 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 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 [2021-03-10 21:16:48,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:48,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:48,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:48,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:16:48,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:48,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-03-10 21:16:48,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759398449] [2021-03-10 21:16:48,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:16:48,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:48,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:16:48,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:48,802 INFO L87 Difference]: Start difference. First operand 53169 states and 119843 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:49,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:49,425 INFO L93 Difference]: Finished difference Result 57178 states and 128792 transitions. [2021-03-10 21:16:49,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:16:49,426 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:49,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:49,494 INFO L225 Difference]: With dead ends: 57178 [2021-03-10 21:16:49,494 INFO L226 Difference]: Without dead ends: 57113 [2021-03-10 21:16:49,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 514.4ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:16:49,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57113 states. [2021-03-10 21:16:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57113 to 52644. [2021-03-10 21:16:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52644 states, 52643 states have (on average 2.2556085329483504) internal successors, (118742), 52643 states have internal predecessors, (118742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52644 states to 52644 states and 118742 transitions. [2021-03-10 21:16:50,349 INFO L78 Accepts]: Start accepts. Automaton has 52644 states and 118742 transitions. Word has length 42 [2021-03-10 21:16:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:50,349 INFO L480 AbstractCegarLoop]: Abstraction has 52644 states and 118742 transitions. [2021-03-10 21:16:50,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 52644 states and 118742 transitions. [2021-03-10 21:16:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:50,376 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:50,376 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:50,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:50,576 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:50,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:50,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1499834081, now seen corresponding path program 131 times [2021-03-10 21:16:50,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:50,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679073945] [2021-03-10 21:16:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:50,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679073945] [2021-03-10 21:16:50,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421653493] [2021-03-10 21:16:50,709 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 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 [2021-03-10 21:16:50,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:16:50,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:50,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:50,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:51,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:51,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-03-10 21:16:51,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649588576] [2021-03-10 21:16:51,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:16:51,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:51,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:16:51,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:51,011 INFO L87 Difference]: Start difference. First operand 52644 states and 118742 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:51,855 INFO L93 Difference]: Finished difference Result 54729 states and 123160 transitions. [2021-03-10 21:16:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:16:51,856 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:52,236 INFO L225 Difference]: With dead ends: 54729 [2021-03-10 21:16:52,236 INFO L226 Difference]: Without dead ends: 54629 [2021-03-10 21:16:52,236 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 633.0ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:16:52,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54629 states. [2021-03-10 21:16:52,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54629 to 52701. [2021-03-10 21:16:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52701 states, 52700 states have (on average 2.2552182163187857) internal successors, (118850), 52700 states have internal predecessors, (118850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:52,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52701 states to 52701 states and 118850 transitions. [2021-03-10 21:16:52,856 INFO L78 Accepts]: Start accepts. Automaton has 52701 states and 118850 transitions. Word has length 42 [2021-03-10 21:16:52,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:52,856 INFO L480 AbstractCegarLoop]: Abstraction has 52701 states and 118850 transitions. [2021-03-10 21:16:52,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 52701 states and 118850 transitions. [2021-03-10 21:16:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:52,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:52,885 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:53,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:53,086 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:53,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:53,086 INFO L82 PathProgramCache]: Analyzing trace with hash -367050537, now seen corresponding path program 132 times [2021-03-10 21:16:53,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:53,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545708481] [2021-03-10 21:16:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:53,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545708481] [2021-03-10 21:16:53,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288220505] [2021-03-10 21:16:53,221 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 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 [2021-03-10 21:16:53,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:16:53,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:53,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:53,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:53,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:53,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-03-10 21:16:53,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475699825] [2021-03-10 21:16:53,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:16:53,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:53,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:16:53,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:53,488 INFO L87 Difference]: Start difference. First operand 52701 states and 118850 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:54,354 INFO L93 Difference]: Finished difference Result 56271 states and 126636 transitions. [2021-03-10 21:16:54,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:16:54,354 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:54,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:54,421 INFO L225 Difference]: With dead ends: 56271 [2021-03-10 21:16:54,421 INFO L226 Difference]: Without dead ends: 56195 [2021-03-10 21:16:54,421 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 430.7ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:16:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56195 states. [2021-03-10 21:16:55,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56195 to 54531. [2021-03-10 21:16:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54531 states, 54530 states have (on average 2.256684393911608) internal successors, (123057), 54530 states have internal predecessors, (123057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:55,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54531 states to 54531 states and 123057 transitions. [2021-03-10 21:16:55,316 INFO L78 Accepts]: Start accepts. Automaton has 54531 states and 123057 transitions. Word has length 42 [2021-03-10 21:16:55,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:55,316 INFO L480 AbstractCegarLoop]: Abstraction has 54531 states and 123057 transitions. [2021-03-10 21:16:55,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:55,316 INFO L276 IsEmpty]: Start isEmpty. Operand 54531 states and 123057 transitions. [2021-03-10 21:16:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:55,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:55,343 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:55,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:55,544 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:55,544 INFO L82 PathProgramCache]: Analyzing trace with hash 835986527, now seen corresponding path program 133 times [2021-03-10 21:16:55,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:55,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556949458] [2021-03-10 21:16:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:55,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556949458] [2021-03-10 21:16:55,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554940033] [2021-03-10 21:16:55,676 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 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 [2021-03-10 21:16:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:55,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:55,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:16:55,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:55,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-03-10 21:16:55,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316386825] [2021-03-10 21:16:55,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:16:55,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:55,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:16:55,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:55,940 INFO L87 Difference]: Start difference. First operand 54531 states and 123057 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:56,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:56,442 INFO L93 Difference]: Finished difference Result 56394 states and 127052 transitions. [2021-03-10 21:16:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:16:56,443 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:56,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:56,508 INFO L225 Difference]: With dead ends: 56394 [2021-03-10 21:16:56,508 INFO L226 Difference]: Without dead ends: 56355 [2021-03-10 21:16:56,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:16:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56355 states. [2021-03-10 21:16:57,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56355 to 55760. [2021-03-10 21:16:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55760 states, 55759 states have (on average 2.2566222493229793) internal successors, (125827), 55759 states have internal predecessors, (125827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55760 states to 55760 states and 125827 transitions. [2021-03-10 21:16:57,389 INFO L78 Accepts]: Start accepts. Automaton has 55760 states and 125827 transitions. Word has length 42 [2021-03-10 21:16:57,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:57,389 INFO L480 AbstractCegarLoop]: Abstraction has 55760 states and 125827 transitions. [2021-03-10 21:16:57,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 55760 states and 125827 transitions. [2021-03-10 21:16:57,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:57,419 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:57,419 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:57,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:57,620 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:57,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:57,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1067721981, now seen corresponding path program 134 times [2021-03-10 21:16:57,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:57,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668273116] [2021-03-10 21:16:57,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:57,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668273116] [2021-03-10 21:16:57,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573839440] [2021-03-10 21:16:57,755 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 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 [2021-03-10 21:16:57,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:57,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:57,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:16:57,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:16:58,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:58,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-03-10 21:16:58,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346487371] [2021-03-10 21:16:58,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:16:58,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:58,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:16:58,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:16:58,036 INFO L87 Difference]: Start difference. First operand 55760 states and 125827 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:58,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:58,773 INFO L93 Difference]: Finished difference Result 57019 states and 128491 transitions. [2021-03-10 21:16:58,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:16:58,774 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:16:58,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:58,842 INFO L225 Difference]: With dead ends: 57019 [2021-03-10 21:16:58,842 INFO L226 Difference]: Without dead ends: 56955 [2021-03-10 21:16:58,842 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 552.5ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:16:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56955 states. [2021-03-10 21:16:59,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56955 to 55709. [2021-03-10 21:16:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55709 states, 55708 states have (on average 2.2564981690241974) internal successors, (125705), 55708 states have internal predecessors, (125705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55709 states to 55709 states and 125705 transitions. [2021-03-10 21:16:59,676 INFO L78 Accepts]: Start accepts. Automaton has 55709 states and 125705 transitions. Word has length 42 [2021-03-10 21:16:59,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:59,676 INFO L480 AbstractCegarLoop]: Abstraction has 55709 states and 125705 transitions. [2021-03-10 21:16:59,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 55709 states and 125705 transitions. [2021-03-10 21:16:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:16:59,705 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:59,705 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:59,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-03-10 21:16:59,905 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:59,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:59,906 INFO L82 PathProgramCache]: Analyzing trace with hash -171286659, now seen corresponding path program 135 times [2021-03-10 21:16:59,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:59,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114608437] [2021-03-10 21:16:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:00,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114608437] [2021-03-10 21:17:00,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254370471] [2021-03-10 21:17:00,041 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 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 [2021-03-10 21:17:00,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:17:00,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:00,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:17:00,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:00,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:00,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-03-10 21:17:00,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878477358] [2021-03-10 21:17:00,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:17:00,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:00,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:17:00,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:00,339 INFO L87 Difference]: Start difference. First operand 55709 states and 125705 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:01,506 INFO L93 Difference]: Finished difference Result 59486 states and 133971 transitions. [2021-03-10 21:17:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:17:01,507 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:17:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:01,586 INFO L225 Difference]: With dead ends: 59486 [2021-03-10 21:17:01,587 INFO L226 Difference]: Without dead ends: 59421 [2021-03-10 21:17:01,587 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 593.3ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:17:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59421 states. [2021-03-10 21:17:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59421 to 55326. [2021-03-10 21:17:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55326 states, 55325 states have (on average 2.257279710799819) internal successors, (124884), 55325 states have internal predecessors, (124884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55326 states to 55326 states and 124884 transitions. [2021-03-10 21:17:02,510 INFO L78 Accepts]: Start accepts. Automaton has 55326 states and 124884 transitions. Word has length 42 [2021-03-10 21:17:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:02,510 INFO L480 AbstractCegarLoop]: Abstraction has 55326 states and 124884 transitions. [2021-03-10 21:17:02,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 55326 states and 124884 transitions. [2021-03-10 21:17:02,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:17:02,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:02,539 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:02,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-03-10 21:17:02,740 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:02,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2020553339, now seen corresponding path program 136 times [2021-03-10 21:17:02,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:02,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056109581] [2021-03-10 21:17:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:02,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056109581] [2021-03-10 21:17:02,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757458586] [2021-03-10 21:17:02,886 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 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 [2021-03-10 21:17:02,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:02,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:02,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:17:02,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:17:03,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:03,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-03-10 21:17:03,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748386768] [2021-03-10 21:17:03,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:17:03,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:03,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:17:03,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:17:03,165 INFO L87 Difference]: Start difference. First operand 55326 states and 124884 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:03,730 INFO L93 Difference]: Finished difference Result 56537 states and 127438 transitions. [2021-03-10 21:17:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:17:03,731 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:17:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:03,799 INFO L225 Difference]: With dead ends: 56537 [2021-03-10 21:17:03,800 INFO L226 Difference]: Without dead ends: 56480 [2021-03-10 21:17:03,800 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 469.4ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:17:03,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56480 states. [2021-03-10 21:17:04,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56480 to 55326. [2021-03-10 21:17:04,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55326 states, 55325 states have (on average 2.257279710799819) internal successors, (124884), 55325 states have internal predecessors, (124884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55326 states to 55326 states and 124884 transitions. [2021-03-10 21:17:04,672 INFO L78 Accepts]: Start accepts. Automaton has 55326 states and 124884 transitions. Word has length 42 [2021-03-10 21:17:04,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:04,672 INFO L480 AbstractCegarLoop]: Abstraction has 55326 states and 124884 transitions. [2021-03-10 21:17:04,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:04,672 INFO L276 IsEmpty]: Start isEmpty. Operand 55326 states and 124884 transitions. [2021-03-10 21:17:04,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:17:04,701 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:04,701 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:04,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-03-10 21:17:04,903 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:04,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:04,903 INFO L82 PathProgramCache]: Analyzing trace with hash 442232079, now seen corresponding path program 137 times [2021-03-10 21:17:04,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:04,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923939933] [2021-03-10 21:17:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:05,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923939933] [2021-03-10 21:17:05,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551717013] [2021-03-10 21:17:05,041 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 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 [2021-03-10 21:17:05,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:17:05,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:05,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:17:05,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:05,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:05,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-03-10 21:17:05,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246161015] [2021-03-10 21:17:05,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:17:05,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:05,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:17:05,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:17:05,323 INFO L87 Difference]: Start difference. First operand 55326 states and 124884 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:05,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:05,923 INFO L93 Difference]: Finished difference Result 56317 states and 126979 transitions. [2021-03-10 21:17:05,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:17:05,924 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:17:05,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:05,989 INFO L225 Difference]: With dead ends: 56317 [2021-03-10 21:17:05,989 INFO L226 Difference]: Without dead ends: 56270 [2021-03-10 21:17:05,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 501.0ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:17:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56270 states. [2021-03-10 21:17:06,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56270 to 55585. [2021-03-10 21:17:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55585 states, 55584 states have (on average 2.257304260218768) internal successors, (125470), 55584 states have internal predecessors, (125470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55585 states to 55585 states and 125470 transitions. [2021-03-10 21:17:06,834 INFO L78 Accepts]: Start accepts. Automaton has 55585 states and 125470 transitions. Word has length 42 [2021-03-10 21:17:06,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:06,834 INFO L480 AbstractCegarLoop]: Abstraction has 55585 states and 125470 transitions. [2021-03-10 21:17:06,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 55585 states and 125470 transitions. [2021-03-10 21:17:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:17:06,864 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:06,864 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:07,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-03-10 21:17:07,064 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:07,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1041263967, now seen corresponding path program 138 times [2021-03-10 21:17:07,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:07,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744037709] [2021-03-10 21:17:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:07,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744037709] [2021-03-10 21:17:07,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448348531] [2021-03-10 21:17:07,206 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 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 [2021-03-10 21:17:07,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:17:07,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:07,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:17:07,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:07,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:07,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-03-10 21:17:07,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577348308] [2021-03-10 21:17:07,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:17:07,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:07,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:17:07,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:07,534 INFO L87 Difference]: Start difference. First operand 55585 states and 125470 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:08,178 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-03-10 21:17:08,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:08,988 INFO L93 Difference]: Finished difference Result 61301 states and 138297 transitions. [2021-03-10 21:17:08,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:17:08,989 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:17:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:09,065 INFO L225 Difference]: With dead ends: 61301 [2021-03-10 21:17:09,065 INFO L226 Difference]: Without dead ends: 61234 [2021-03-10 21:17:09,065 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1018.9ms TimeCoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:17:09,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61234 states. [2021-03-10 21:17:09,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61234 to 55915. [2021-03-10 21:17:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55915 states, 55914 states have (on average 2.256268555281325) internal successors, (126157), 55914 states have internal predecessors, (126157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:09,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55915 states to 55915 states and 126157 transitions. [2021-03-10 21:17:09,942 INFO L78 Accepts]: Start accepts. Automaton has 55915 states and 126157 transitions. Word has length 42 [2021-03-10 21:17:09,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:09,942 INFO L480 AbstractCegarLoop]: Abstraction has 55915 states and 126157 transitions. [2021-03-10 21:17:09,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:09,943 INFO L276 IsEmpty]: Start isEmpty. Operand 55915 states and 126157 transitions. [2021-03-10 21:17:09,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 21:17:09,972 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:09,972 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:10,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-03-10 21:17:10,173 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:10,173 INFO L82 PathProgramCache]: Analyzing trace with hash 863946971, now seen corresponding path program 139 times [2021-03-10 21:17:10,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:10,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591417171] [2021-03-10 21:17:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:10,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591417171] [2021-03-10 21:17:10,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654666831] [2021-03-10 21:17:10,322 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:10,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:17:10,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:17:10,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:10,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-03-10 21:17:10,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287063137] [2021-03-10 21:17:10,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:17:10,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:10,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:17:10,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:17:10,581 INFO L87 Difference]: Start difference. First operand 55915 states and 126157 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:11,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:11,373 INFO L93 Difference]: Finished difference Result 56362 states and 127061 transitions. [2021-03-10 21:17:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:17:11,374 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-03-10 21:17:11,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:11,448 INFO L225 Difference]: With dead ends: 56362 [2021-03-10 21:17:11,448 INFO L226 Difference]: Without dead ends: 56322 [2021-03-10 21:17:11,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 542.2ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:17:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56322 states. [2021-03-10 21:17:12,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56322 to 56135. [2021-03-10 21:17:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56135 states, 56134 states have (on average 2.256546834360637) internal successors, (126669), 56134 states have internal predecessors, (126669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56135 states to 56135 states and 126669 transitions. [2021-03-10 21:17:12,411 INFO L78 Accepts]: Start accepts. Automaton has 56135 states and 126669 transitions. Word has length 42 [2021-03-10 21:17:12,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:12,411 INFO L480 AbstractCegarLoop]: Abstraction has 56135 states and 126669 transitions. [2021-03-10 21:17:12,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 56135 states and 126669 transitions. [2021-03-10 21:17:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 21:17:12,441 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:12,441 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:12,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:12,642 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:12,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:12,642 INFO L82 PathProgramCache]: Analyzing trace with hash -395845787, now seen corresponding path program 8 times [2021-03-10 21:17:12,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:12,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834087197] [2021-03-10 21:17:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:12,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834087197] [2021-03-10 21:17:12,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070699432] [2021-03-10 21:17:12,702 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 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 [2021-03-10 21:17:12,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:12,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:12,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:12,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:12,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:12,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:17:12,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730311982] [2021-03-10 21:17:12,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:17:12,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:12,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:17:12,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:17:12,805 INFO L87 Difference]: Start difference. First operand 56135 states and 126669 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:13,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:13,124 INFO L93 Difference]: Finished difference Result 59240 states and 132696 transitions. [2021-03-10 21:17:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:17:13,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 21:17:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:13,195 INFO L225 Difference]: With dead ends: 59240 [2021-03-10 21:17:13,195 INFO L226 Difference]: Without dead ends: 59240 [2021-03-10 21:17:13,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:13,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59240 states. [2021-03-10 21:17:14,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59240 to 56220. [2021-03-10 21:17:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56220 states, 56219 states have (on average 2.256176737401946) internal successors, (126840), 56219 states have internal predecessors, (126840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56220 states to 56220 states and 126840 transitions. [2021-03-10 21:17:14,157 INFO L78 Accepts]: Start accepts. Automaton has 56220 states and 126840 transitions. Word has length 43 [2021-03-10 21:17:14,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:14,157 INFO L480 AbstractCegarLoop]: Abstraction has 56220 states and 126840 transitions. [2021-03-10 21:17:14,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 56220 states and 126840 transitions. [2021-03-10 21:17:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:17:14,188 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:14,188 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:14,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:14,388 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:14,388 INFO L82 PathProgramCache]: Analyzing trace with hash 624773514, now seen corresponding path program 140 times [2021-03-10 21:17:14,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:14,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080964395] [2021-03-10 21:17:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:14,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080964395] [2021-03-10 21:17:14,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687850625] [2021-03-10 21:17:14,631 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 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 [2021-03-10 21:17:14,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:14,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:14,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:17:14,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:15,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:15,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:17:15,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294524571] [2021-03-10 21:17:15,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:17:15,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:15,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:17:15,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:17:15,017 INFO L87 Difference]: Start difference. First operand 56220 states and 126840 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:16,381 INFO L93 Difference]: Finished difference Result 57581 states and 129835 transitions. [2021-03-10 21:17:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:17:16,381 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:17:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:16,451 INFO L225 Difference]: With dead ends: 57581 [2021-03-10 21:17:16,451 INFO L226 Difference]: Without dead ends: 57564 [2021-03-10 21:17:16,451 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 777.7ms TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:17:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57564 states. [2021-03-10 21:17:17,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57564 to 57088. [2021-03-10 21:17:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57088 states, 57087 states have (on average 2.2573440538126017) internal successors, (128865), 57087 states have internal predecessors, (128865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57088 states to 57088 states and 128865 transitions. [2021-03-10 21:17:17,381 INFO L78 Accepts]: Start accepts. Automaton has 57088 states and 128865 transitions. Word has length 44 [2021-03-10 21:17:17,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:17,381 INFO L480 AbstractCegarLoop]: Abstraction has 57088 states and 128865 transitions. [2021-03-10 21:17:17,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:17,381 INFO L276 IsEmpty]: Start isEmpty. Operand 57088 states and 128865 transitions. [2021-03-10 21:17:17,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:17:17,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:17,413 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:17,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:17,613 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:17,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:17,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1201506898, now seen corresponding path program 141 times [2021-03-10 21:17:17,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:17,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349060380] [2021-03-10 21:17:17,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:17,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349060380] [2021-03-10 21:17:17,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376337559] [2021-03-10 21:17:17,842 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 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 [2021-03-10 21:17:17,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:17:17,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:17,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:17:17,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:18,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:18,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:17:18,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138936773] [2021-03-10 21:17:18,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:17:18,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:18,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:17:18,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:17:18,318 INFO L87 Difference]: Start difference. First operand 57088 states and 128865 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:20,783 INFO L93 Difference]: Finished difference Result 64602 states and 145282 transitions. [2021-03-10 21:17:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:17:20,784 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:17:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:20,860 INFO L225 Difference]: With dead ends: 64602 [2021-03-10 21:17:20,861 INFO L226 Difference]: Without dead ends: 64568 [2021-03-10 21:17:20,861 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1032.9ms TimeCoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:17:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64568 states. [2021-03-10 21:17:21,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64568 to 60075. [2021-03-10 21:17:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60075 states, 60074 states have (on average 2.265805506541932) internal successors, (136116), 60074 states have internal predecessors, (136116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60075 states to 60075 states and 136116 transitions. [2021-03-10 21:17:21,580 INFO L78 Accepts]: Start accepts. Automaton has 60075 states and 136116 transitions. Word has length 44 [2021-03-10 21:17:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:21,580 INFO L480 AbstractCegarLoop]: Abstraction has 60075 states and 136116 transitions. [2021-03-10 21:17:21,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:21,580 INFO L276 IsEmpty]: Start isEmpty. Operand 60075 states and 136116 transitions. [2021-03-10 21:17:21,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:17:21,836 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:21,836 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:22,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:22,037 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:22,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:22,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1948613002, now seen corresponding path program 142 times [2021-03-10 21:17:22,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:22,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056913945] [2021-03-10 21:17:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:22,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056913945] [2021-03-10 21:17:22,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464765580] [2021-03-10 21:17:22,275 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 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 [2021-03-10 21:17:22,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:22,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:22,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:17:22,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:22,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:22,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:17:22,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910633928] [2021-03-10 21:17:22,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:17:22,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:22,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:17:22,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:17:22,671 INFO L87 Difference]: Start difference. First operand 60075 states and 136116 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:24,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:24,063 INFO L93 Difference]: Finished difference Result 61117 states and 138361 transitions. [2021-03-10 21:17:24,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:17:24,063 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:17:24,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:24,134 INFO L225 Difference]: With dead ends: 61117 [2021-03-10 21:17:24,134 INFO L226 Difference]: Without dead ends: 61100 [2021-03-10 21:17:24,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 897.2ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:17:24,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61100 states. [2021-03-10 21:17:24,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61100 to 60610. [2021-03-10 21:17:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60610 states, 60609 states have (on average 2.26736953257767) internal successors, (137423), 60609 states have internal predecessors, (137423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60610 states to 60610 states and 137423 transitions. [2021-03-10 21:17:24,965 INFO L78 Accepts]: Start accepts. Automaton has 60610 states and 137423 transitions. Word has length 44 [2021-03-10 21:17:24,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:24,965 INFO L480 AbstractCegarLoop]: Abstraction has 60610 states and 137423 transitions. [2021-03-10 21:17:24,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:24,965 INFO L276 IsEmpty]: Start isEmpty. Operand 60610 states and 137423 transitions. [2021-03-10 21:17:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:17:24,998 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:24,998 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:25,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:25,198 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:25,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:25,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1247898286, now seen corresponding path program 143 times [2021-03-10 21:17:25,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:25,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721205265] [2021-03-10 21:17:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:25,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721205265] [2021-03-10 21:17:25,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062953652] [2021-03-10 21:17:25,427 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 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 [2021-03-10 21:17:25,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:17:25,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:25,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:17:25,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:26,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:26,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-03-10 21:17:26,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376089518] [2021-03-10 21:17:26,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 21:17:26,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:26,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 21:17:26,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:17:26,013 INFO L87 Difference]: Start difference. First operand 60610 states and 137423 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:27,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:27,771 INFO L93 Difference]: Finished difference Result 62141 states and 140673 transitions. [2021-03-10 21:17:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:17:27,772 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:17:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:27,849 INFO L225 Difference]: With dead ends: 62141 [2021-03-10 21:17:27,850 INFO L226 Difference]: Without dead ends: 62124 [2021-03-10 21:17:27,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1188.6ms TimeCoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:17:27,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62124 states. [2021-03-10 21:17:28,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62124 to 61220. [2021-03-10 21:17:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61220 states, 61219 states have (on average 2.269083127787125) internal successors, (138911), 61219 states have internal predecessors, (138911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61220 states to 61220 states and 138911 transitions. [2021-03-10 21:17:28,741 INFO L78 Accepts]: Start accepts. Automaton has 61220 states and 138911 transitions. Word has length 44 [2021-03-10 21:17:28,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:28,741 INFO L480 AbstractCegarLoop]: Abstraction has 61220 states and 138911 transitions. [2021-03-10 21:17:28,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:28,741 INFO L276 IsEmpty]: Start isEmpty. Operand 61220 states and 138911 transitions. [2021-03-10 21:17:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:17:28,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:28,774 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:28,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:28,975 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:28,975 INFO L82 PathProgramCache]: Analyzing trace with hash 632835722, now seen corresponding path program 144 times [2021-03-10 21:17:28,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:28,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394770691] [2021-03-10 21:17:28,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:29,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394770691] [2021-03-10 21:17:29,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143982197] [2021-03-10 21:17:29,207 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 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 [2021-03-10 21:17:29,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:17:29,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:29,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:17:29,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:29,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:29,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-03-10 21:17:29,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405669423] [2021-03-10 21:17:29,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 21:17:29,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:29,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 21:17:29,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:17:29,794 INFO L87 Difference]: Start difference. First operand 61220 states and 138911 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:32,135 INFO L93 Difference]: Finished difference Result 67577 states and 152697 transitions. [2021-03-10 21:17:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 21:17:32,136 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:17:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:32,229 INFO L225 Difference]: With dead ends: 67577 [2021-03-10 21:17:32,229 INFO L226 Difference]: Without dead ends: 67543 [2021-03-10 21:17:32,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1428.7ms TimeCoverageRelationStatistics Valid=223, Invalid=2747, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:17:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67543 states. [2021-03-10 21:17:33,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67543 to 63075. [2021-03-10 21:17:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63075 states, 63074 states have (on average 2.2736151187494054) internal successors, (143406), 63074 states have internal predecessors, (143406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63075 states to 63075 states and 143406 transitions. [2021-03-10 21:17:33,271 INFO L78 Accepts]: Start accepts. Automaton has 63075 states and 143406 transitions. Word has length 44 [2021-03-10 21:17:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:33,271 INFO L480 AbstractCegarLoop]: Abstraction has 63075 states and 143406 transitions. [2021-03-10 21:17:33,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 63075 states and 143406 transitions. [2021-03-10 21:17:33,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:17:33,305 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:33,306 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:33,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:33,506 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:33,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:33,506 INFO L82 PathProgramCache]: Analyzing trace with hash 592118866, now seen corresponding path program 145 times [2021-03-10 21:17:33,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:33,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267489553] [2021-03-10 21:17:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:33,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267489553] [2021-03-10 21:17:33,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780199131] [2021-03-10 21:17:33,751 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 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 [2021-03-10 21:17:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:33,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:17:33,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:34,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:34,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-03-10 21:17:34,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52294499] [2021-03-10 21:17:34,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:17:34,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:34,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:17:34,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:17:34,178 INFO L87 Difference]: Start difference. First operand 63075 states and 143406 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:35,261 INFO L93 Difference]: Finished difference Result 64664 states and 146868 transitions. [2021-03-10 21:17:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:17:35,262 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:17:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:35,342 INFO L225 Difference]: With dead ends: 64664 [2021-03-10 21:17:35,342 INFO L226 Difference]: Without dead ends: 64630 [2021-03-10 21:17:35,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 801.1ms TimeCoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:17:35,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64630 states. [2021-03-10 21:17:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64630 to 64028. [2021-03-10 21:17:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64028 states, 64027 states have (on average 2.2752901119840065) internal successors, (145680), 64027 states have internal predecessors, (145680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64028 states to 64028 states and 145680 transitions. [2021-03-10 21:17:36,501 INFO L78 Accepts]: Start accepts. Automaton has 64028 states and 145680 transitions. Word has length 44 [2021-03-10 21:17:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:36,501 INFO L480 AbstractCegarLoop]: Abstraction has 64028 states and 145680 transitions. [2021-03-10 21:17:36,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 64028 states and 145680 transitions. [2021-03-10 21:17:36,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:17:36,535 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:36,535 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:36,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-03-10 21:17:36,736 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:36,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:36,737 INFO L82 PathProgramCache]: Analyzing trace with hash 994599818, now seen corresponding path program 146 times [2021-03-10 21:17:36,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:36,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393747616] [2021-03-10 21:17:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:37,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393747616] [2021-03-10 21:17:37,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757429642] [2021-03-10 21:17:37,002 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 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 [2021-03-10 21:17:37,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:37,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:17:37,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:37,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:37,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-03-10 21:17:37,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103904357] [2021-03-10 21:17:37,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:17:37,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:37,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:17:37,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:17:37,714 INFO L87 Difference]: Start difference. First operand 64028 states and 145680 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:38,873 INFO L93 Difference]: Finished difference Result 65329 states and 148442 transitions. [2021-03-10 21:17:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:17:38,874 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:17:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:38,957 INFO L225 Difference]: With dead ends: 65329 [2021-03-10 21:17:38,957 INFO L226 Difference]: Without dead ends: 65295 [2021-03-10 21:17:38,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1102.5ms TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:17:39,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65295 states. [2021-03-10 21:17:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65295 to 64699. [2021-03-10 21:17:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64699 states, 64698 states have (on average 2.276160004946057) internal successors, (147263), 64698 states have internal predecessors, (147263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64699 states to 64699 states and 147263 transitions. [2021-03-10 21:17:39,853 INFO L78 Accepts]: Start accepts. Automaton has 64699 states and 147263 transitions. Word has length 44 [2021-03-10 21:17:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:39,853 INFO L480 AbstractCegarLoop]: Abstraction has 64699 states and 147263 transitions. [2021-03-10 21:17:39,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 64699 states and 147263 transitions. [2021-03-10 21:17:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:17:39,887 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:39,887 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:40,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:40,088 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:40,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:40,088 INFO L82 PathProgramCache]: Analyzing trace with hash 314707794, now seen corresponding path program 147 times [2021-03-10 21:17:40,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:40,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369645084] [2021-03-10 21:17:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:40,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369645084] [2021-03-10 21:17:40,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930262022] [2021-03-10 21:17:40,322 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 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 [2021-03-10 21:17:40,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:17:40,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:40,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:17:40,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:40,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:40,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:17:40,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952644707] [2021-03-10 21:17:40,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:17:40,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:40,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:17:40,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:17:40,813 INFO L87 Difference]: Start difference. First operand 64699 states and 147263 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:42,785 INFO L93 Difference]: Finished difference Result 75604 states and 171475 transitions. [2021-03-10 21:17:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:17:42,786 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:17:42,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:42,888 INFO L225 Difference]: With dead ends: 75604 [2021-03-10 21:17:42,889 INFO L226 Difference]: Without dead ends: 75535 [2021-03-10 21:17:42,889 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1084.9ms TimeCoverageRelationStatistics Valid=167, Invalid=2089, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:17:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75535 states. [2021-03-10 21:17:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75535 to 69950. [2021-03-10 21:17:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69950 states, 69949 states have (on average 2.2841355844972764) internal successors, (159773), 69949 states have internal predecessors, (159773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69950 states to 69950 states and 159773 transitions. [2021-03-10 21:17:44,012 INFO L78 Accepts]: Start accepts. Automaton has 69950 states and 159773 transitions. Word has length 44 [2021-03-10 21:17:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:44,012 INFO L480 AbstractCegarLoop]: Abstraction has 69950 states and 159773 transitions. [2021-03-10 21:17:44,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 69950 states and 159773 transitions. [2021-03-10 21:17:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:17:44,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:44,049 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:44,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 21:17:44,249 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:44,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:44,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1595616440, now seen corresponding path program 148 times [2021-03-10 21:17:44,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:44,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650711684] [2021-03-10 21:17:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:44,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650711684] [2021-03-10 21:17:44,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155502150] [2021-03-10 21:17:44,487 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:44,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:44,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:44,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:17:44,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:44,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:44,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:17:44,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93980723] [2021-03-10 21:17:44,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:17:44,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:44,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:17:44,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:17:44,889 INFO L87 Difference]: Start difference. First operand 69950 states and 159773 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:46,138 INFO L93 Difference]: Finished difference Result 70952 states and 161947 transitions. [2021-03-10 21:17:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:17:46,139 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:17:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:46,498 INFO L225 Difference]: With dead ends: 70952 [2021-03-10 21:17:46,498 INFO L226 Difference]: Without dead ends: 70935 [2021-03-10 21:17:46,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 896.0ms TimeCoverageRelationStatistics Valid=134, Invalid=1506, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:17:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70935 states. [2021-03-10 21:17:47,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70935 to 70483. [2021-03-10 21:17:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70483 states, 70482 states have (on average 2.285392014982549) internal successors, (161079), 70482 states have internal predecessors, (161079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:47,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70483 states to 70483 states and 161079 transitions. [2021-03-10 21:17:47,606 INFO L78 Accepts]: Start accepts. Automaton has 70483 states and 161079 transitions. Word has length 44 [2021-03-10 21:17:47,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:47,606 INFO L480 AbstractCegarLoop]: Abstraction has 70483 states and 161079 transitions. [2021-03-10 21:17:47,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 70483 states and 161079 transitions. [2021-03-10 21:17:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:17:47,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:47,636 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:47,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:47,836 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:47,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:47,836 INFO L82 PathProgramCache]: Analyzing trace with hash -839131036, now seen corresponding path program 149 times [2021-03-10 21:17:47,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:47,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140698441] [2021-03-10 21:17:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:48,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140698441] [2021-03-10 21:17:48,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130939501] [2021-03-10 21:17:48,117 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 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 [2021-03-10 21:17:48,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:17:48,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:48,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:17:48,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:48,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:48,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-03-10 21:17:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563233959] [2021-03-10 21:17:48,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 21:17:48,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:48,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 21:17:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:17:48,725 INFO L87 Difference]: Start difference. First operand 70483 states and 161079 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:50,325 INFO L93 Difference]: Finished difference Result 71720 states and 163724 transitions. [2021-03-10 21:17:50,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:17:50,326 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:17:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:50,421 INFO L225 Difference]: With dead ends: 71720 [2021-03-10 21:17:50,421 INFO L226 Difference]: Without dead ends: 71703 [2021-03-10 21:17:50,421 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1261.4ms TimeCoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:17:50,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71703 states. [2021-03-10 21:17:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71703 to 71032. [2021-03-10 21:17:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71032 states, 71031 states have (on average 2.2866494910672803) internal successors, (162423), 71031 states have internal predecessors, (162423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71032 states to 71032 states and 162423 transitions. [2021-03-10 21:17:51,435 INFO L78 Accepts]: Start accepts. Automaton has 71032 states and 162423 transitions. Word has length 44 [2021-03-10 21:17:51,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:51,435 INFO L480 AbstractCegarLoop]: Abstraction has 71032 states and 162423 transitions. [2021-03-10 21:17:51,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 71032 states and 162423 transitions. [2021-03-10 21:17:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:17:51,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:51,473 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:51,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-03-10 21:17:51,673 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:51,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:51,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2116521804, now seen corresponding path program 150 times [2021-03-10 21:17:51,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:51,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868589310] [2021-03-10 21:17:51,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:51,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868589310] [2021-03-10 21:17:51,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557706749] [2021-03-10 21:17:51,920 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 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 [2021-03-10 21:17:52,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:17:52,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:52,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:17:52,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:52,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:52,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:17:52,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139819602] [2021-03-10 21:17:52,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:17:52,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:52,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:17:52,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:17:52,617 INFO L87 Difference]: Start difference. First operand 71032 states and 162423 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:54,728 INFO L93 Difference]: Finished difference Result 79207 states and 180098 transitions. [2021-03-10 21:17:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:17:54,729 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:17:54,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:54,830 INFO L225 Difference]: With dead ends: 79207 [2021-03-10 21:17:54,831 INFO L226 Difference]: Without dead ends: 79173 [2021-03-10 21:17:54,831 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1145.7ms TimeCoverageRelationStatistics Valid=167, Invalid=2185, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:17:54,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79173 states. [2021-03-10 21:17:55,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79173 to 73877. [2021-03-10 21:17:55,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73877 states, 73876 states have (on average 2.292016351724511) internal successors, (169325), 73876 states have internal predecessors, (169325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73877 states to 73877 states and 169325 transitions. [2021-03-10 21:17:55,881 INFO L78 Accepts]: Start accepts. Automaton has 73877 states and 169325 transitions. Word has length 44 [2021-03-10 21:17:55,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:55,881 INFO L480 AbstractCegarLoop]: Abstraction has 73877 states and 169325 transitions. [2021-03-10 21:17:55,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:55,881 INFO L276 IsEmpty]: Start isEmpty. Operand 73877 states and 169325 transitions. [2021-03-10 21:17:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:17:55,917 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:55,918 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:56,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:56,118 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:56,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:56,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1018065796, now seen corresponding path program 151 times [2021-03-10 21:17:56,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:56,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841829985] [2021-03-10 21:17:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:56,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841829985] [2021-03-10 21:17:56,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862268495] [2021-03-10 21:17:56,665 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 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 [2021-03-10 21:17:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:56,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:17:56,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:57,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:57,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:17:57,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737721916] [2021-03-10 21:17:57,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:17:57,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:57,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:17:57,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:17:57,072 INFO L87 Difference]: Start difference. First operand 73877 states and 169325 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:58,333 INFO L93 Difference]: Finished difference Result 74738 states and 171189 transitions. [2021-03-10 21:17:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:17:58,334 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:17:58,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:58,421 INFO L225 Difference]: With dead ends: 74738 [2021-03-10 21:17:58,422 INFO L226 Difference]: Without dead ends: 74721 [2021-03-10 21:17:58,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1220.5ms TimeCoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:17:58,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74721 states. [2021-03-10 21:17:59,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74721 to 74366. [2021-03-10 21:17:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74366 states, 74365 states have (on average 2.2927990318025953) internal successors, (170504), 74365 states have internal predecessors, (170504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74366 states to 74366 states and 170504 transitions. [2021-03-10 21:17:59,495 INFO L78 Accepts]: Start accepts. Automaton has 74366 states and 170504 transitions. Word has length 44 [2021-03-10 21:17:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:59,495 INFO L480 AbstractCegarLoop]: Abstraction has 74366 states and 170504 transitions. [2021-03-10 21:17:59,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 74366 states and 170504 transitions. [2021-03-10 21:17:59,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:17:59,533 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:59,533 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:59,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:59,733 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash 862668212, now seen corresponding path program 152 times [2021-03-10 21:17:59,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:59,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610667623] [2021-03-10 21:17:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:59,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610667623] [2021-03-10 21:17:59,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469683301] [2021-03-10 21:17:59,974 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 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 [2021-03-10 21:17:59,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:59,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:59,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:17:59,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:00,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:00,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:18:00,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370324828] [2021-03-10 21:18:00,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:18:00,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:00,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:18:00,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:18:00,399 INFO L87 Difference]: Start difference. First operand 74366 states and 170504 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:02,278 INFO L93 Difference]: Finished difference Result 78636 states and 179826 transitions. [2021-03-10 21:18:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:18:02,279 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:18:02,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:02,377 INFO L225 Difference]: With dead ends: 78636 [2021-03-10 21:18:02,378 INFO L226 Difference]: Without dead ends: 78602 [2021-03-10 21:18:02,378 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1121.9ms TimeCoverageRelationStatistics Valid=167, Invalid=1995, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:18:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78602 states. [2021-03-10 21:18:03,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78602 to 75625. [2021-03-10 21:18:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75625 states, 75624 states have (on average 2.2950782820268696) internal successors, (173563), 75624 states have internal predecessors, (173563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75625 states to 75625 states and 173563 transitions. [2021-03-10 21:18:03,430 INFO L78 Accepts]: Start accepts. Automaton has 75625 states and 173563 transitions. Word has length 44 [2021-03-10 21:18:03,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:03,430 INFO L480 AbstractCegarLoop]: Abstraction has 75625 states and 173563 transitions. [2021-03-10 21:18:03,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:03,431 INFO L276 IsEmpty]: Start isEmpty. Operand 75625 states and 173563 transitions. [2021-03-10 21:18:03,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:18:03,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:03,467 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:03,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:03,667 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:03,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:03,668 INFO L82 PathProgramCache]: Analyzing trace with hash 821951356, now seen corresponding path program 153 times [2021-03-10 21:18:03,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:03,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686973718] [2021-03-10 21:18:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:03,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686973718] [2021-03-10 21:18:03,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952375562] [2021-03-10 21:18:03,903 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 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 [2021-03-10 21:18:03,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:18:03,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:03,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:18:03,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:04,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:04,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:18:04,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802839888] [2021-03-10 21:18:04,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:18:04,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:04,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:18:04,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:18:04,404 INFO L87 Difference]: Start difference. First operand 75625 states and 173563 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:06,919 INFO L93 Difference]: Finished difference Result 84081 states and 191944 transitions. [2021-03-10 21:18:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:18:06,920 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:18:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:07,028 INFO L225 Difference]: With dead ends: 84081 [2021-03-10 21:18:07,028 INFO L226 Difference]: Without dead ends: 84034 [2021-03-10 21:18:07,028 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1169.1ms TimeCoverageRelationStatistics Valid=184, Invalid=2266, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:18:07,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84034 states. [2021-03-10 21:18:07,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84034 to 78487. [2021-03-10 21:18:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78487 states, 78486 states have (on average 2.2985245776316794) internal successors, (180402), 78486 states have internal predecessors, (180402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78487 states to 78487 states and 180402 transitions. [2021-03-10 21:18:08,170 INFO L78 Accepts]: Start accepts. Automaton has 78487 states and 180402 transitions. Word has length 44 [2021-03-10 21:18:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:08,170 INFO L480 AbstractCegarLoop]: Abstraction has 78487 states and 180402 transitions. [2021-03-10 21:18:08,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 78487 states and 180402 transitions. [2021-03-10 21:18:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:18:08,209 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:08,209 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:08,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:08,410 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:08,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1224432308, now seen corresponding path program 154 times [2021-03-10 21:18:08,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:08,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804399251] [2021-03-10 21:18:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:08,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804399251] [2021-03-10 21:18:08,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265161235] [2021-03-10 21:18:08,725 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:18:08,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:08,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:08,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:18:08,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:09,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:09,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-03-10 21:18:09,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933672209] [2021-03-10 21:18:09,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:18:09,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:09,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:18:09,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:18:09,262 INFO L87 Difference]: Start difference. First operand 78487 states and 180402 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:10,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:10,748 INFO L93 Difference]: Finished difference Result 79146 states and 181810 transitions. [2021-03-10 21:18:10,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:18:10,749 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:18:10,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:10,860 INFO L225 Difference]: With dead ends: 79146 [2021-03-10 21:18:10,860 INFO L226 Difference]: Without dead ends: 79112 [2021-03-10 21:18:10,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 999.1ms TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:18:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79112 states. [2021-03-10 21:18:11,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79112 to 79027. [2021-03-10 21:18:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79027 states, 79026 states have (on average 2.2979146103813934) internal successors, (181595), 79026 states have internal predecessors, (181595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79027 states to 79027 states and 181595 transitions. [2021-03-10 21:18:11,985 INFO L78 Accepts]: Start accepts. Automaton has 79027 states and 181595 transitions. Word has length 44 [2021-03-10 21:18:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:11,985 INFO L480 AbstractCegarLoop]: Abstraction has 79027 states and 181595 transitions. [2021-03-10 21:18:11,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:11,985 INFO L276 IsEmpty]: Start isEmpty. Operand 79027 states and 181595 transitions. [2021-03-10 21:18:12,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:18:12,023 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:12,023 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:12,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-03-10 21:18:12,224 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:12,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:12,224 INFO L82 PathProgramCache]: Analyzing trace with hash -722916894, now seen corresponding path program 155 times [2021-03-10 21:18:12,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:12,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406701648] [2021-03-10 21:18:12,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:12,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406701648] [2021-03-10 21:18:12,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948269943] [2021-03-10 21:18:12,460 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 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 [2021-03-10 21:18:12,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:18:12,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:12,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:18:12,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:12,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:12,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:18:12,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027771332] [2021-03-10 21:18:12,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:18:12,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:12,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:18:12,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:18:12,964 INFO L87 Difference]: Start difference. First operand 79027 states and 181595 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:14,586 INFO L93 Difference]: Finished difference Result 87645 states and 201012 transitions. [2021-03-10 21:18:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:18:14,588 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:18:14,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:14,704 INFO L225 Difference]: With dead ends: 87645 [2021-03-10 21:18:14,704 INFO L226 Difference]: Without dead ends: 87602 [2021-03-10 21:18:14,704 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 922.9ms TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:18:14,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87602 states. [2021-03-10 21:18:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87602 to 84874. [2021-03-10 21:18:15,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84874 states, 84873 states have (on average 2.3016742662566423) internal successors, (195350), 84873 states have internal predecessors, (195350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:15,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84874 states to 84874 states and 195350 transitions. [2021-03-10 21:18:15,923 INFO L78 Accepts]: Start accepts. Automaton has 84874 states and 195350 transitions. Word has length 44 [2021-03-10 21:18:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:15,923 INFO L480 AbstractCegarLoop]: Abstraction has 84874 states and 195350 transitions. [2021-03-10 21:18:15,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 84874 states and 195350 transitions. [2021-03-10 21:18:15,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:18:15,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:15,963 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:16,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-10 21:18:16,164 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:16,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:16,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1402578930, now seen corresponding path program 156 times [2021-03-10 21:18:16,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:16,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543243233] [2021-03-10 21:18:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:16,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543243233] [2021-03-10 21:18:16,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799243301] [2021-03-10 21:18:16,406 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 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 [2021-03-10 21:18:16,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:18:16,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:16,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:18:16,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:16,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:16,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:18:16,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840520166] [2021-03-10 21:18:16,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:18:16,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:16,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:18:16,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:18:16,825 INFO L87 Difference]: Start difference. First operand 84874 states and 195350 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:18,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:18,700 INFO L93 Difference]: Finished difference Result 87816 states and 201709 transitions. [2021-03-10 21:18:18,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:18:18,701 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:18:18,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:18,815 INFO L225 Difference]: With dead ends: 87816 [2021-03-10 21:18:18,815 INFO L226 Difference]: Without dead ends: 87799 [2021-03-10 21:18:18,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1054.9ms TimeCoverageRelationStatistics Valid=151, Invalid=1829, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:18:18,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87799 states. [2021-03-10 21:18:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87799 to 85630. [2021-03-10 21:18:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85630 states, 85629 states have (on average 2.3027479008279905) internal successors, (197182), 85629 states have internal predecessors, (197182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:20,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85630 states to 85630 states and 197182 transitions. [2021-03-10 21:18:20,107 INFO L78 Accepts]: Start accepts. Automaton has 85630 states and 197182 transitions. Word has length 44 [2021-03-10 21:18:20,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:20,107 INFO L480 AbstractCegarLoop]: Abstraction has 85630 states and 197182 transitions. [2021-03-10 21:18:20,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:20,107 INFO L276 IsEmpty]: Start isEmpty. Operand 85630 states and 197182 transitions. [2021-03-10 21:18:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:18:20,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:20,150 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:20,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:20,350 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:20,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:20,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1044575176, now seen corresponding path program 157 times [2021-03-10 21:18:20,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:20,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747627061] [2021-03-10 21:18:20,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:20,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747627061] [2021-03-10 21:18:20,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541501267] [2021-03-10 21:18:20,589 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 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 [2021-03-10 21:18:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:20,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:18:20,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:21,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:21,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:18:21,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469335165] [2021-03-10 21:18:21,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:18:21,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:21,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:18:21,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:18:21,011 INFO L87 Difference]: Start difference. First operand 85630 states and 197182 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:22,642 INFO L93 Difference]: Finished difference Result 86430 states and 198919 transitions. [2021-03-10 21:18:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:18:22,643 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:18:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:22,757 INFO L225 Difference]: With dead ends: 86430 [2021-03-10 21:18:22,757 INFO L226 Difference]: Without dead ends: 86413 [2021-03-10 21:18:22,757 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 960.9ms TimeCoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:18:22,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86413 states. [2021-03-10 21:18:23,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86413 to 86134. [2021-03-10 21:18:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86134 states, 86133 states have (on average 2.303333217233813) internal successors, (198393), 86133 states have internal predecessors, (198393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86134 states to 86134 states and 198393 transitions. [2021-03-10 21:18:24,030 INFO L78 Accepts]: Start accepts. Automaton has 86134 states and 198393 transitions. Word has length 44 [2021-03-10 21:18:24,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:24,031 INFO L480 AbstractCegarLoop]: Abstraction has 86134 states and 198393 transitions. [2021-03-10 21:18:24,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:24,031 INFO L276 IsEmpty]: Start isEmpty. Operand 86134 states and 198393 transitions. [2021-03-10 21:18:24,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:18:24,073 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:24,073 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:24,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-03-10 21:18:24,274 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:24,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:24,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1825448930, now seen corresponding path program 158 times [2021-03-10 21:18:24,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:24,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712342472] [2021-03-10 21:18:24,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:24,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712342472] [2021-03-10 21:18:24,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733416759] [2021-03-10 21:18:24,518 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 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 [2021-03-10 21:18:24,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:24,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:24,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:18:24,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:24,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:24,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:18:24,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64329678] [2021-03-10 21:18:24,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:18:24,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:24,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:18:24,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:18:24,941 INFO L87 Difference]: Start difference. First operand 86134 states and 198393 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:26,000 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-03-10 21:18:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:26,565 INFO L93 Difference]: Finished difference Result 86926 states and 200105 transitions. [2021-03-10 21:18:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:18:26,566 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:18:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:26,680 INFO L225 Difference]: With dead ends: 86926 [2021-03-10 21:18:26,680 INFO L226 Difference]: Without dead ends: 86909 [2021-03-10 21:18:26,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1213.0ms TimeCoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:18:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86909 states. [2021-03-10 21:18:27,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86909 to 86615. [2021-03-10 21:18:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86615 states, 86614 states have (on average 2.3039000623455794) internal successors, (199550), 86614 states have internal predecessors, (199550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86615 states to 86615 states and 199550 transitions. [2021-03-10 21:18:27,896 INFO L78 Accepts]: Start accepts. Automaton has 86615 states and 199550 transitions. Word has length 44 [2021-03-10 21:18:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:27,896 INFO L480 AbstractCegarLoop]: Abstraction has 86615 states and 199550 transitions. [2021-03-10 21:18:27,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 86615 states and 199550 transitions. [2021-03-10 21:18:27,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:18:27,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:27,937 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:28,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-03-10 21:18:28,138 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:28,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:28,138 INFO L82 PathProgramCache]: Analyzing trace with hash 144907922, now seen corresponding path program 159 times [2021-03-10 21:18:28,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:28,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936886035] [2021-03-10 21:18:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:28,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936886035] [2021-03-10 21:18:28,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182598668] [2021-03-10 21:18:28,458 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 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 [2021-03-10 21:18:28,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:18:28,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:18:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:29,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:29,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-03-10 21:18:29,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617528981] [2021-03-10 21:18:29,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 21:18:29,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:29,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 21:18:29,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:18:29,095 INFO L87 Difference]: Start difference. First operand 86615 states and 199550 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:31,630 INFO L93 Difference]: Finished difference Result 91083 states and 209196 transitions. [2021-03-10 21:18:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:18:31,631 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:18:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:31,750 INFO L225 Difference]: With dead ends: 91083 [2021-03-10 21:18:31,750 INFO L226 Difference]: Without dead ends: 91049 [2021-03-10 21:18:31,750 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1565.5ms TimeCoverageRelationStatistics Valid=198, Invalid=2772, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:18:31,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91049 states. [2021-03-10 21:18:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91049 to 87931. [2021-03-10 21:18:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87931 states, 87930 states have (on average 2.305606732628227) internal successors, (202732), 87930 states have internal predecessors, (202732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:33,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87931 states to 87931 states and 202732 transitions. [2021-03-10 21:18:33,077 INFO L78 Accepts]: Start accepts. Automaton has 87931 states and 202732 transitions. Word has length 44 [2021-03-10 21:18:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:33,077 INFO L480 AbstractCegarLoop]: Abstraction has 87931 states and 202732 transitions. [2021-03-10 21:18:33,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:33,077 INFO L276 IsEmpty]: Start isEmpty. Operand 87931 states and 202732 transitions. [2021-03-10 21:18:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:18:33,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:33,116 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:33,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-03-10 21:18:33,317 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:33,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:33,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1243363930, now seen corresponding path program 160 times [2021-03-10 21:18:33,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:33,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570439450] [2021-03-10 21:18:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:33,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570439450] [2021-03-10 21:18:33,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312729342] [2021-03-10 21:18:33,569 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 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 [2021-03-10 21:18:33,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:33,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:33,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:18:33,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:34,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:34,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:18:34,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209665508] [2021-03-10 21:18:34,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:18:34,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:34,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:18:34,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:18:34,283 INFO L87 Difference]: Start difference. First operand 87931 states and 202732 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:35,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:35,613 INFO L93 Difference]: Finished difference Result 88810 states and 204621 transitions. [2021-03-10 21:18:35,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:18:35,614 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:18:35,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:35,731 INFO L225 Difference]: With dead ends: 88810 [2021-03-10 21:18:35,731 INFO L226 Difference]: Without dead ends: 88793 [2021-03-10 21:18:35,731 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1155.0ms TimeCoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:18:35,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88793 states. [2021-03-10 21:18:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88793 to 88408. [2021-03-10 21:18:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88408 states, 88407 states have (on average 2.3060843598357597) internal successors, (203874), 88407 states have internal predecessors, (203874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88408 states to 88408 states and 203874 transitions. [2021-03-10 21:18:37,034 INFO L78 Accepts]: Start accepts. Automaton has 88408 states and 203874 transitions. Word has length 44 [2021-03-10 21:18:37,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:37,034 INFO L480 AbstractCegarLoop]: Abstraction has 88408 states and 203874 transitions. [2021-03-10 21:18:37,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:37,034 INFO L276 IsEmpty]: Start isEmpty. Operand 88408 states and 203874 transitions. [2021-03-10 21:18:37,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:18:37,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:37,075 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:37,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:37,275 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:37,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:37,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1170869358, now seen corresponding path program 161 times [2021-03-10 21:18:37,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:37,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382194610] [2021-03-10 21:18:37,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:37,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382194610] [2021-03-10 21:18:37,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123018317] [2021-03-10 21:18:37,529 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 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 [2021-03-10 21:18:37,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:18:37,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:37,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:18:37,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:38,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:38,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-03-10 21:18:38,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588904743] [2021-03-10 21:18:38,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 21:18:38,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:38,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 21:18:38,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:18:38,478 INFO L87 Difference]: Start difference. First operand 88408 states and 203874 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:41,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:41,058 INFO L93 Difference]: Finished difference Result 94594 states and 217166 transitions. [2021-03-10 21:18:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:18:41,060 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:18:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:41,189 INFO L225 Difference]: With dead ends: 94594 [2021-03-10 21:18:41,189 INFO L226 Difference]: Without dead ends: 94560 [2021-03-10 21:18:41,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1887.5ms TimeCoverageRelationStatistics Valid=244, Invalid=3178, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:18:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94560 states. [2021-03-10 21:18:42,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94560 to 89603. [2021-03-10 21:18:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89603 states, 89602 states have (on average 2.307281087475726) internal successors, (206737), 89602 states have internal predecessors, (206737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:42,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89603 states to 89603 states and 206737 transitions. [2021-03-10 21:18:42,784 INFO L78 Accepts]: Start accepts. Automaton has 89603 states and 206737 transitions. Word has length 44 [2021-03-10 21:18:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:42,784 INFO L480 AbstractCegarLoop]: Abstraction has 89603 states and 206737 transitions. [2021-03-10 21:18:42,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 89603 states and 206737 transitions. [2021-03-10 21:18:42,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:18:42,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:42,827 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:43,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-03-10 21:18:43,027 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:43,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:43,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1211586214, now seen corresponding path program 162 times [2021-03-10 21:18:43,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:43,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163088959] [2021-03-10 21:18:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:43,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163088959] [2021-03-10 21:18:43,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770186074] [2021-03-10 21:18:43,277 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 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 [2021-03-10 21:18:43,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:18:43,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:43,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:18:43,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:43,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:43,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-03-10 21:18:43,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625868536] [2021-03-10 21:18:43,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 21:18:43,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:43,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 21:18:43,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:18:43,930 INFO L87 Difference]: Start difference. First operand 89603 states and 206737 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:46,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:46,753 INFO L93 Difference]: Finished difference Result 95030 states and 218324 transitions. [2021-03-10 21:18:46,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 21:18:46,754 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:18:46,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:46,884 INFO L225 Difference]: With dead ends: 95030 [2021-03-10 21:18:46,884 INFO L226 Difference]: Without dead ends: 94996 [2021-03-10 21:18:46,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1798.5ms TimeCoverageRelationStatistics Valid=275, Invalid=3507, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 21:18:46,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94996 states. [2021-03-10 21:18:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94996 to 90812. [2021-03-10 21:18:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90812 states, 90811 states have (on average 2.308002334518946) internal successors, (209592), 90811 states have internal predecessors, (209592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:48,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90812 states to 90812 states and 209592 transitions. [2021-03-10 21:18:48,224 INFO L78 Accepts]: Start accepts. Automaton has 90812 states and 209592 transitions. Word has length 44 [2021-03-10 21:18:48,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:48,225 INFO L480 AbstractCegarLoop]: Abstraction has 90812 states and 209592 transitions. [2021-03-10 21:18:48,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:48,225 INFO L276 IsEmpty]: Start isEmpty. Operand 90812 states and 209592 transitions. [2021-03-10 21:18:48,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:18:48,270 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:48,270 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:48,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:48,470 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:48,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:48,470 INFO L82 PathProgramCache]: Analyzing trace with hash -809105262, now seen corresponding path program 163 times [2021-03-10 21:18:48,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:48,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173970200] [2021-03-10 21:18:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:48,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173970200] [2021-03-10 21:18:48,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459582052] [2021-03-10 21:18:48,726 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 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 [2021-03-10 21:18:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:48,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:18:48,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:49,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:49,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-03-10 21:18:49,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624023670] [2021-03-10 21:18:49,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:18:49,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:49,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:18:49,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:18:49,249 INFO L87 Difference]: Start difference. First operand 90812 states and 209592 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:51,144 INFO L93 Difference]: Finished difference Result 91387 states and 210800 transitions. [2021-03-10 21:18:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:18:51,146 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:18:51,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:51,274 INFO L225 Difference]: With dead ends: 91387 [2021-03-10 21:18:51,274 INFO L226 Difference]: Without dead ends: 91353 [2021-03-10 21:18:51,274 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1060.0ms TimeCoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:18:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91353 states. [2021-03-10 21:18:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91353 to 91255. [2021-03-10 21:18:52,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91255 states, 91254 states have (on average 2.3073289937975323) internal successors, (210553), 91254 states have internal predecessors, (210553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91255 states to 91255 states and 210553 transitions. [2021-03-10 21:18:52,656 INFO L78 Accepts]: Start accepts. Automaton has 91255 states and 210553 transitions. Word has length 44 [2021-03-10 21:18:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:52,656 INFO L480 AbstractCegarLoop]: Abstraction has 91255 states and 210553 transitions. [2021-03-10 21:18:52,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:52,657 INFO L276 IsEmpty]: Start isEmpty. Operand 91255 states and 210553 transitions. [2021-03-10 21:18:52,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:18:52,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:52,700 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:52,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:52,901 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1488997286, now seen corresponding path program 164 times [2021-03-10 21:18:52,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:52,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181460469] [2021-03-10 21:18:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:53,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181460469] [2021-03-10 21:18:53,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921870437] [2021-03-10 21:18:53,177 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 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 [2021-03-10 21:18:53,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:53,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:53,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:18:53,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:18:53,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:53,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:18:53,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586845359] [2021-03-10 21:18:53,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:18:53,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:53,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:18:53,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:18:53,715 INFO L87 Difference]: Start difference. First operand 91255 states and 210553 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:55,628 INFO L93 Difference]: Finished difference Result 96202 states and 221311 transitions. [2021-03-10 21:18:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:18:55,629 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:18:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:55,759 INFO L225 Difference]: With dead ends: 96202 [2021-03-10 21:18:55,759 INFO L226 Difference]: Without dead ends: 96159 [2021-03-10 21:18:55,759 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1094.2ms TimeCoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:18:55,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96159 states. [2021-03-10 21:18:56,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96159 to 93581. [2021-03-10 21:18:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93581 states, 93580 states have (on average 2.3081320795041678) internal successors, (215995), 93580 states have internal predecessors, (215995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93581 states to 93581 states and 215995 transitions. [2021-03-10 21:18:57,166 INFO L78 Accepts]: Start accepts. Automaton has 93581 states and 215995 transitions. Word has length 44 [2021-03-10 21:18:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:57,166 INFO L480 AbstractCegarLoop]: Abstraction has 93581 states and 215995 transitions. [2021-03-10 21:18:57,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 93581 states and 215995 transitions. [2021-03-10 21:18:57,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:18:57,209 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:57,210 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:57,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:57,410 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:57,410 INFO L82 PathProgramCache]: Analyzing trace with hash 858850796, now seen corresponding path program 165 times [2021-03-10 21:18:57,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:57,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032352669] [2021-03-10 21:18:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:57,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032352669] [2021-03-10 21:18:57,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902938041] [2021-03-10 21:18:57,687 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 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 [2021-03-10 21:18:57,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:18:57,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:57,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:18:57,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:18:58,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:58,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:18:58,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192551518] [2021-03-10 21:18:58,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:18:58,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:58,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:18:58,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:18:58,487 INFO L87 Difference]: Start difference. First operand 93581 states and 215995 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:59,940 INFO L93 Difference]: Finished difference Result 94378 states and 217720 transitions. [2021-03-10 21:18:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:18:59,941 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:18:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:00,076 INFO L225 Difference]: With dead ends: 94378 [2021-03-10 21:19:00,076 INFO L226 Difference]: Without dead ends: 94361 [2021-03-10 21:19:00,077 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1305.0ms TimeCoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:19:00,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94361 states. [2021-03-10 21:19:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94361 to 94068. [2021-03-10 21:19:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94068 states, 94067 states have (on average 2.308577928497773) internal successors, (217161), 94067 states have internal predecessors, (217161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94068 states to 94068 states and 217161 transitions. [2021-03-10 21:19:01,545 INFO L78 Accepts]: Start accepts. Automaton has 94068 states and 217161 transitions. Word has length 44 [2021-03-10 21:19:01,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:01,545 INFO L480 AbstractCegarLoop]: Abstraction has 94068 states and 217161 transitions. [2021-03-10 21:19:01,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 94068 states and 217161 transitions. [2021-03-10 21:19:01,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:19:01,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:01,590 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:01,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:01,791 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:01,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:01,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1216854550, now seen corresponding path program 166 times [2021-03-10 21:19:01,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:01,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652240747] [2021-03-10 21:19:01,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:02,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652240747] [2021-03-10 21:19:02,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109623081] [2021-03-10 21:19:02,304 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 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 [2021-03-10 21:19:02,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:19:02,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:02,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:19:02,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:02,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:02,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:19:02,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700211873] [2021-03-10 21:19:02,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:19:02,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:02,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:19:02,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:19:02,758 INFO L87 Difference]: Start difference. First operand 94068 states and 217161 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:04,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:04,083 INFO L93 Difference]: Finished difference Result 94858 states and 218871 transitions. [2021-03-10 21:19:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:19:04,084 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:19:04,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:04,214 INFO L225 Difference]: With dead ends: 94858 [2021-03-10 21:19:04,215 INFO L226 Difference]: Without dead ends: 94841 [2021-03-10 21:19:04,215 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1167.0ms TimeCoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:19:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94841 states. [2021-03-10 21:19:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94841 to 94550. [2021-03-10 21:19:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94550 states, 94549 states have (on average 2.3090143734994553) internal successors, (218315), 94549 states have internal predecessors, (218315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94550 states to 94550 states and 218315 transitions. [2021-03-10 21:19:05,626 INFO L78 Accepts]: Start accepts. Automaton has 94550 states and 218315 transitions. Word has length 44 [2021-03-10 21:19:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:05,626 INFO L480 AbstractCegarLoop]: Abstraction has 94550 states and 218315 transitions. [2021-03-10 21:19:05,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:05,626 INFO L276 IsEmpty]: Start isEmpty. Operand 94550 states and 218315 transitions. [2021-03-10 21:19:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:19:05,665 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:05,665 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:05,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-10 21:19:05,866 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:05,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:05,866 INFO L82 PathProgramCache]: Analyzing trace with hash -208088640, now seen corresponding path program 167 times [2021-03-10 21:19:05,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:05,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202638989] [2021-03-10 21:19:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:06,124 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-03-10 21:19:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:06,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202638989] [2021-03-10 21:19:06,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050956016] [2021-03-10 21:19:06,375 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 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 [2021-03-10 21:19:06,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:19:06,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:06,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:19:06,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:07,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:07,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-03-10 21:19:07,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609226719] [2021-03-10 21:19:07,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 21:19:07,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:07,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 21:19:07,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:19:07,030 INFO L87 Difference]: Start difference. First operand 94550 states and 218315 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:09,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:09,030 INFO L93 Difference]: Finished difference Result 95875 states and 221116 transitions. [2021-03-10 21:19:09,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:19:09,031 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:19:09,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:09,146 INFO L225 Difference]: With dead ends: 95875 [2021-03-10 21:19:09,146 INFO L226 Difference]: Without dead ends: 95858 [2021-03-10 21:19:09,146 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1603.3ms TimeCoverageRelationStatistics Valid=177, Invalid=2273, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:19:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95858 states. [2021-03-10 21:19:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95858 to 95022. [2021-03-10 21:19:10,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95022 states, 95021 states have (on average 2.3094368613253913) internal successors, (219445), 95021 states have internal predecessors, (219445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95022 states to 95022 states and 219445 transitions. [2021-03-10 21:19:10,850 INFO L78 Accepts]: Start accepts. Automaton has 95022 states and 219445 transitions. Word has length 44 [2021-03-10 21:19:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:10,850 INFO L480 AbstractCegarLoop]: Abstraction has 95022 states and 219445 transitions. [2021-03-10 21:19:10,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 95022 states and 219445 transitions. [2021-03-10 21:19:10,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:19:10,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:10,890 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:11,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-03-10 21:19:11,091 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:11,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:11,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1703774524, now seen corresponding path program 168 times [2021-03-10 21:19:11,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:11,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377717011] [2021-03-10 21:19:11,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:11,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377717011] [2021-03-10 21:19:11,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189468347] [2021-03-10 21:19:11,346 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 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 [2021-03-10 21:19:11,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:19:11,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:11,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:19:11,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:11,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:11,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:19:11,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401629498] [2021-03-10 21:19:11,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:19:11,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:11,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:19:11,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:19:11,899 INFO L87 Difference]: Start difference. First operand 95022 states and 219445 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:14,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:14,430 INFO L93 Difference]: Finished difference Result 102468 states and 235515 transitions. [2021-03-10 21:19:14,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:19:14,431 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:19:14,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:14,590 INFO L225 Difference]: With dead ends: 102468 [2021-03-10 21:19:14,591 INFO L226 Difference]: Without dead ends: 102434 [2021-03-10 21:19:14,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1172.4ms TimeCoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:19:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102434 states. [2021-03-10 21:19:15,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102434 to 96867. [2021-03-10 21:19:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96867 states, 96866 states have (on average 2.3116573410691057) internal successors, (223921), 96866 states have internal predecessors, (223921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96867 states to 96867 states and 223921 transitions. [2021-03-10 21:19:16,005 INFO L78 Accepts]: Start accepts. Automaton has 96867 states and 223921 transitions. Word has length 44 [2021-03-10 21:19:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:16,005 INFO L480 AbstractCegarLoop]: Abstraction has 96867 states and 223921 transitions. [2021-03-10 21:19:16,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 96867 states and 223921 transitions. [2021-03-10 21:19:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:19:16,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:16,047 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:16,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-03-10 21:19:16,248 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:16,248 INFO L82 PathProgramCache]: Analyzing trace with hash -710458764, now seen corresponding path program 169 times [2021-03-10 21:19:16,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:16,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442171822] [2021-03-10 21:19:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:16,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442171822] [2021-03-10 21:19:16,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734385767] [2021-03-10 21:19:16,511 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 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 [2021-03-10 21:19:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:16,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:19:16,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:16,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:16,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:19:16,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145045871] [2021-03-10 21:19:16,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:19:16,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:16,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:19:16,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:19:16,975 INFO L87 Difference]: Start difference. First operand 96867 states and 223921 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:19,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:19,101 INFO L93 Difference]: Finished difference Result 98052 states and 226487 transitions. [2021-03-10 21:19:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:19:19,103 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:19:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:19,238 INFO L225 Difference]: With dead ends: 98052 [2021-03-10 21:19:19,238 INFO L226 Difference]: Without dead ends: 98018 [2021-03-10 21:19:19,239 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1057.6ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:19:19,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98018 states. [2021-03-10 21:19:20,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98018 to 97513. [2021-03-10 21:19:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97513 states, 97512 states have (on average 2.3119000738370663) internal successors, (225438), 97512 states have internal predecessors, (225438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97513 states to 97513 states and 225438 transitions. [2021-03-10 21:19:20,758 INFO L78 Accepts]: Start accepts. Automaton has 97513 states and 225438 transitions. Word has length 44 [2021-03-10 21:19:20,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:20,758 INFO L480 AbstractCegarLoop]: Abstraction has 97513 states and 225438 transitions. [2021-03-10 21:19:20,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:20,758 INFO L276 IsEmpty]: Start isEmpty. Operand 97513 states and 225438 transitions. [2021-03-10 21:19:20,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:19:20,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:20,806 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:21,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:21,007 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:21,007 INFO L82 PathProgramCache]: Analyzing trace with hash -751175620, now seen corresponding path program 170 times [2021-03-10 21:19:21,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:21,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430701286] [2021-03-10 21:19:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:21,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430701286] [2021-03-10 21:19:21,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178431082] [2021-03-10 21:19:21,270 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 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 [2021-03-10 21:19:21,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:19:21,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:21,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:19:21,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:21,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:21,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-03-10 21:19:21,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008005232] [2021-03-10 21:19:21,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:19:21,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:21,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:19:21,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:19:21,770 INFO L87 Difference]: Start difference. First operand 97513 states and 225438 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:23,669 INFO L93 Difference]: Finished difference Result 97953 states and 226362 transitions. [2021-03-10 21:19:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:19:23,670 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:19:23,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:23,787 INFO L225 Difference]: With dead ends: 97953 [2021-03-10 21:19:23,787 INFO L226 Difference]: Without dead ends: 97919 [2021-03-10 21:19:23,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1023.0ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:19:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97919 states. [2021-03-10 21:19:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97919 to 97846. [2021-03-10 21:19:25,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97846 states, 97845 states have (on average 2.3113802442638867) internal successors, (226157), 97845 states have internal predecessors, (226157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97846 states to 97846 states and 226157 transitions. [2021-03-10 21:19:25,285 INFO L78 Accepts]: Start accepts. Automaton has 97846 states and 226157 transitions. Word has length 44 [2021-03-10 21:19:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:25,285 INFO L480 AbstractCegarLoop]: Abstraction has 97846 states and 226157 transitions. [2021-03-10 21:19:25,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 97846 states and 226157 transitions. [2021-03-10 21:19:25,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:19:25,332 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:25,332 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:25,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:25,532 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:25,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:25,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1028586692, now seen corresponding path program 171 times [2021-03-10 21:19:25,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:25,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370350304] [2021-03-10 21:19:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:25,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370350304] [2021-03-10 21:19:25,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825757893] [2021-03-10 21:19:25,797 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 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 [2021-03-10 21:19:25,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:19:25,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:25,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:19:25,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:26,485 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-03-10 21:19:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:26,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:26,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:19:26,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023397636] [2021-03-10 21:19:26,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:19:26,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:26,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:19:26,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:19:26,799 INFO L87 Difference]: Start difference. First operand 97846 states and 226157 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:29,093 INFO L93 Difference]: Finished difference Result 107624 states and 247584 transitions. [2021-03-10 21:19:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:19:29,094 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:19:29,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:29,266 INFO L225 Difference]: With dead ends: 107624 [2021-03-10 21:19:29,266 INFO L226 Difference]: Without dead ends: 107555 [2021-03-10 21:19:29,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1747.0ms TimeCoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:19:29,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107555 states. [2021-03-10 21:19:30,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107555 to 101908. [2021-03-10 21:19:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101908 states, 101907 states have (on average 2.3131286368944233) internal successors, (235724), 101907 states have internal predecessors, (235724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:31,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101908 states to 101908 states and 235724 transitions. [2021-03-10 21:19:31,188 INFO L78 Accepts]: Start accepts. Automaton has 101908 states and 235724 transitions. Word has length 44 [2021-03-10 21:19:31,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:31,188 INFO L480 AbstractCegarLoop]: Abstraction has 101908 states and 235724 transitions. [2021-03-10 21:19:31,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:31,188 INFO L276 IsEmpty]: Start isEmpty. Operand 101908 states and 235724 transitions. [2021-03-10 21:19:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:19:31,238 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:31,238 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:31,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:31,438 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:31,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:31,439 INFO L82 PathProgramCache]: Analyzing trace with hash 938145336, now seen corresponding path program 172 times [2021-03-10 21:19:31,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:31,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107648796] [2021-03-10 21:19:31,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:31,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107648796] [2021-03-10 21:19:31,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695158346] [2021-03-10 21:19:31,705 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 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 [2021-03-10 21:19:31,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:19:31,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:31,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:19:31,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:19:32,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:32,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-03-10 21:19:32,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055006883] [2021-03-10 21:19:32,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:19:32,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:32,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:19:32,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:19:32,264 INFO L87 Difference]: Start difference. First operand 101908 states and 235724 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:34,461 INFO L93 Difference]: Finished difference Result 105337 states and 243024 transitions. [2021-03-10 21:19:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:19:34,462 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:19:34,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:34,609 INFO L225 Difference]: With dead ends: 105337 [2021-03-10 21:19:34,609 INFO L226 Difference]: Without dead ends: 105303 [2021-03-10 21:19:34,609 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1205.2ms TimeCoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:19:34,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105303 states. [2021-03-10 21:19:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105303 to 102649. [2021-03-10 21:19:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102649 states, 102648 states have (on average 2.3128361000701427) internal successors, (237408), 102648 states have internal predecessors, (237408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102649 states to 102649 states and 237408 transitions. [2021-03-10 21:19:36,260 INFO L78 Accepts]: Start accepts. Automaton has 102649 states and 237408 transitions. Word has length 44 [2021-03-10 21:19:36,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:36,260 INFO L480 AbstractCegarLoop]: Abstraction has 102649 states and 237408 transitions. [2021-03-10 21:19:36,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:36,260 INFO L276 IsEmpty]: Start isEmpty. Operand 102649 states and 237408 transitions. [2021-03-10 21:19:36,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:19:36,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:36,306 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:36,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:36,506 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:36,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:36,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1319261390, now seen corresponding path program 173 times [2021-03-10 21:19:36,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:36,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882261175] [2021-03-10 21:19:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:36,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882261175] [2021-03-10 21:19:36,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852782736] [2021-03-10 21:19:36,773 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 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 [2021-03-10 21:19:36,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:19:36,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:36,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:19:36,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:37,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:37,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-03-10 21:19:37,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127807745] [2021-03-10 21:19:37,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 21:19:37,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:37,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 21:19:37,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:19:37,439 INFO L87 Difference]: Start difference. First operand 102649 states and 237408 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:40,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:40,239 INFO L93 Difference]: Finished difference Result 106385 states and 245433 transitions. [2021-03-10 21:19:40,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 21:19:40,240 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:19:40,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:40,413 INFO L225 Difference]: With dead ends: 106385 [2021-03-10 21:19:40,413 INFO L226 Difference]: Without dead ends: 106368 [2021-03-10 21:19:40,414 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1542.7ms TimeCoverageRelationStatistics Valid=206, Invalid=2656, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 21:19:40,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106368 states. [2021-03-10 21:19:41,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106368 to 103417. [2021-03-10 21:19:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103417 states, 103416 states have (on average 2.313549160671463) internal successors, (239258), 103416 states have internal predecessors, (239258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103417 states to 103417 states and 239258 transitions. [2021-03-10 21:19:42,748 INFO L78 Accepts]: Start accepts. Automaton has 103417 states and 239258 transitions. Word has length 44 [2021-03-10 21:19:42,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:42,748 INFO L480 AbstractCegarLoop]: Abstraction has 103417 states and 239258 transitions. [2021-03-10 21:19:42,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 103417 states and 239258 transitions. [2021-03-10 21:19:42,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:19:42,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:42,831 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:43,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:43,047 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:43,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:43,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1040789202, now seen corresponding path program 174 times [2021-03-10 21:19:43,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:43,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811770183] [2021-03-10 21:19:43,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:43,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811770183] [2021-03-10 21:19:43,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523590338] [2021-03-10 21:19:43,405 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 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 [2021-03-10 21:19:43,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:19:43,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:43,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:19:43,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:44,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:44,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:19:44,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633711494] [2021-03-10 21:19:44,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:19:44,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:44,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:19:44,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:19:44,182 INFO L87 Difference]: Start difference. First operand 103417 states and 239258 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:46,593 INFO L93 Difference]: Finished difference Result 113434 states and 261363 transitions. [2021-03-10 21:19:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:19:46,594 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:19:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:46,751 INFO L225 Difference]: With dead ends: 113434 [2021-03-10 21:19:46,751 INFO L226 Difference]: Without dead ends: 113400 [2021-03-10 21:19:46,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1572.0ms TimeCoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:19:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113400 states. [2021-03-10 21:19:48,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113400 to 107359. [2021-03-10 21:19:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107359 states, 107358 states have (on average 2.3174612045678944) internal successors, (248798), 107358 states have internal predecessors, (248798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107359 states to 107359 states and 248798 transitions. [2021-03-10 21:19:48,687 INFO L78 Accepts]: Start accepts. Automaton has 107359 states and 248798 transitions. Word has length 44 [2021-03-10 21:19:48,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:48,687 INFO L480 AbstractCegarLoop]: Abstraction has 107359 states and 248798 transitions. [2021-03-10 21:19:48,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 107359 states and 248798 transitions. [2021-03-10 21:19:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:19:48,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:48,737 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:48,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:48,938 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:48,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:48,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1000072346, now seen corresponding path program 175 times [2021-03-10 21:19:48,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:48,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85157829] [2021-03-10 21:19:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:49,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85157829] [2021-03-10 21:19:49,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111280139] [2021-03-10 21:19:49,218 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 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 [2021-03-10 21:19:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:49,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:19:49,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:49,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:49,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-03-10 21:19:49,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718097191] [2021-03-10 21:19:49,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:19:49,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:49,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:19:49,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:19:49,777 INFO L87 Difference]: Start difference. First operand 107359 states and 248798 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:51,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:51,953 INFO L93 Difference]: Finished difference Result 107947 states and 250062 transitions. [2021-03-10 21:19:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:19:51,955 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:19:51,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:52,101 INFO L225 Difference]: With dead ends: 107947 [2021-03-10 21:19:52,102 INFO L226 Difference]: Without dead ends: 107913 [2021-03-10 21:19:52,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1170.9ms TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:19:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107913 states. [2021-03-10 21:19:53,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107913 to 107616. [2021-03-10 21:19:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107616 states, 107615 states have (on average 2.3171490963155694) internal successors, (249360), 107615 states have internal predecessors, (249360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107616 states to 107616 states and 249360 transitions. [2021-03-10 21:19:53,821 INFO L78 Accepts]: Start accepts. Automaton has 107616 states and 249360 transitions. Word has length 44 [2021-03-10 21:19:53,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:53,821 INFO L480 AbstractCegarLoop]: Abstraction has 107616 states and 249360 transitions. [2021-03-10 21:19:53,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:53,822 INFO L276 IsEmpty]: Start isEmpty. Operand 107616 states and 249360 transitions. [2021-03-10 21:19:53,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:19:53,872 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:53,872 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:54,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:54,073 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:54,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:54,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1402553298, now seen corresponding path program 176 times [2021-03-10 21:19:54,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:54,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807811366] [2021-03-10 21:19:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:54,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807811366] [2021-03-10 21:19:54,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259946398] [2021-03-10 21:19:54,384 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 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 [2021-03-10 21:19:54,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:19:54,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:54,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:19:54,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:54,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:54,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-03-10 21:19:54,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269724212] [2021-03-10 21:19:54,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:19:54,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:54,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:19:54,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:19:54,936 INFO L87 Difference]: Start difference. First operand 107616 states and 249360 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:57,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:57,295 INFO L93 Difference]: Finished difference Result 108285 states and 250781 transitions. [2021-03-10 21:19:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:19:57,297 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:19:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:57,459 INFO L225 Difference]: With dead ends: 108285 [2021-03-10 21:19:57,459 INFO L226 Difference]: Without dead ends: 108251 [2021-03-10 21:19:57,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1293.7ms TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:19:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108251 states. [2021-03-10 21:19:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108251 to 107958. [2021-03-10 21:19:58,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107958 states, 107957 states have (on average 2.316616801133785) internal successors, (250095), 107957 states have internal predecessors, (250095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107958 states to 107958 states and 250095 transitions. [2021-03-10 21:19:59,649 INFO L78 Accepts]: Start accepts. Automaton has 107958 states and 250095 transitions. Word has length 44 [2021-03-10 21:19:59,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:59,649 INFO L480 AbstractCegarLoop]: Abstraction has 107958 states and 250095 transitions. [2021-03-10 21:19:59,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 107958 states and 250095 transitions. [2021-03-10 21:19:59,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:19:59,686 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:59,686 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:59,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:59,886 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:59,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:59,886 INFO L82 PathProgramCache]: Analyzing trace with hash 402638746, now seen corresponding path program 177 times [2021-03-10 21:19:59,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:59,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484223828] [2021-03-10 21:19:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:00,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484223828] [2021-03-10 21:20:00,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900554724] [2021-03-10 21:20:00,167 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 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 [2021-03-10 21:20:00,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:20:00,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:00,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:20:00,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:20:00,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:00,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:20:00,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243864941] [2021-03-10 21:20:00,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:20:00,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:00,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:20:00,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:20:00,830 INFO L87 Difference]: Start difference. First operand 107958 states and 250095 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:03,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:03,863 INFO L93 Difference]: Finished difference Result 113083 states and 261318 transitions. [2021-03-10 21:20:03,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:20:03,865 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:20:03,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:04,045 INFO L225 Difference]: With dead ends: 113083 [2021-03-10 21:20:04,046 INFO L226 Difference]: Without dead ends: 113048 [2021-03-10 21:20:04,046 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1539.6ms TimeCoverageRelationStatistics Valid=190, Invalid=2360, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:20:04,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113048 states. [2021-03-10 21:20:05,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113048 to 110015. [2021-03-10 21:20:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110015 states, 110014 states have (on average 2.316923300670824) internal successors, (254894), 110014 states have internal predecessors, (254894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110015 states to 110015 states and 254894 transitions. [2021-03-10 21:20:05,689 INFO L78 Accepts]: Start accepts. Automaton has 110015 states and 254894 transitions. Word has length 44 [2021-03-10 21:20:05,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:05,690 INFO L480 AbstractCegarLoop]: Abstraction has 110015 states and 254894 transitions. [2021-03-10 21:20:05,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:05,690 INFO L276 IsEmpty]: Start isEmpty. Operand 110015 states and 254894 transitions. [2021-03-10 21:20:05,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:20:05,735 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:05,735 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:05,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:05,936 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:05,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:05,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1512322538, now seen corresponding path program 178 times [2021-03-10 21:20:05,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:05,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426316847] [2021-03-10 21:20:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:06,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426316847] [2021-03-10 21:20:06,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001629732] [2021-03-10 21:20:06,271 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 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 [2021-03-10 21:20:06,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:20:06,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:06,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:20:06,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:20:06,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:06,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:20:06,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601531730] [2021-03-10 21:20:06,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:20:06,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:06,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:20:06,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:20:06,774 INFO L87 Difference]: Start difference. First operand 110015 states and 254894 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:08,736 INFO L93 Difference]: Finished difference Result 113021 states and 261647 transitions. [2021-03-10 21:20:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:20:08,737 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:20:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:08,922 INFO L225 Difference]: With dead ends: 113021 [2021-03-10 21:20:08,922 INFO L226 Difference]: Without dead ends: 112978 [2021-03-10 21:20:08,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1039.9ms TimeCoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:20:09,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112978 states. [2021-03-10 21:20:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112978 to 112408. [2021-03-10 21:20:10,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112408 states, 112407 states have (on average 2.317604775503305) internal successors, (260515), 112407 states have internal predecessors, (260515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112408 states to 112408 states and 260515 transitions. [2021-03-10 21:20:10,891 INFO L78 Accepts]: Start accepts. Automaton has 112408 states and 260515 transitions. Word has length 44 [2021-03-10 21:20:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:10,891 INFO L480 AbstractCegarLoop]: Abstraction has 112408 states and 260515 transitions. [2021-03-10 21:20:10,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 112408 states and 260515 transitions. [2021-03-10 21:20:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:20:10,940 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:10,941 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:11,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-03-10 21:20:11,141 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:11,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1543995358, now seen corresponding path program 179 times [2021-03-10 21:20:11,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:11,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881459679] [2021-03-10 21:20:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:11,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881459679] [2021-03-10 21:20:11,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877118352] [2021-03-10 21:20:11,463 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 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 [2021-03-10 21:20:11,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:20:11,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:11,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:20:11,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:20:12,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:12,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-03-10 21:20:12,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036129173] [2021-03-10 21:20:12,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:20:12,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:12,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:20:12,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:20:12,527 INFO L87 Difference]: Start difference. First operand 112408 states and 260515 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:14,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:14,169 INFO L93 Difference]: Finished difference Result 113524 states and 262883 transitions. [2021-03-10 21:20:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:20:14,171 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:20:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:14,362 INFO L225 Difference]: With dead ends: 113524 [2021-03-10 21:20:14,363 INFO L226 Difference]: Without dead ends: 113481 [2021-03-10 21:20:14,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1677.6ms TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:20:14,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113481 states. [2021-03-10 21:20:16,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113481 to 113164. [2021-03-10 21:20:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113164 states, 113163 states have (on average 2.3171796435230596) internal successors, (262219), 113163 states have internal predecessors, (262219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:16,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113164 states to 113164 states and 262219 transitions. [2021-03-10 21:20:16,555 INFO L78 Accepts]: Start accepts. Automaton has 113164 states and 262219 transitions. Word has length 44 [2021-03-10 21:20:16,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:16,555 INFO L480 AbstractCegarLoop]: Abstraction has 113164 states and 262219 transitions. [2021-03-10 21:20:16,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:16,555 INFO L276 IsEmpty]: Start isEmpty. Operand 113164 states and 262219 transitions. [2021-03-10 21:20:16,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:20:16,604 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:16,604 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:16,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:16,807 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:16,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1946476310, now seen corresponding path program 180 times [2021-03-10 21:20:16,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:16,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30153352] [2021-03-10 21:20:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:17,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30153352] [2021-03-10 21:20:17,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075126599] [2021-03-10 21:20:17,116 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 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 [2021-03-10 21:20:17,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:20:17,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:17,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:20:17,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:20:17,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:17,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-03-10 21:20:17,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403313526] [2021-03-10 21:20:17,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:20:17,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:20:17,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:20:17,764 INFO L87 Difference]: Start difference. First operand 113164 states and 262219 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:20,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:20,150 INFO L93 Difference]: Finished difference Result 122596 states and 283278 transitions. [2021-03-10 21:20:20,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:20:20,152 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:20:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:20,376 INFO L225 Difference]: With dead ends: 122596 [2021-03-10 21:20:20,377 INFO L226 Difference]: Without dead ends: 122544 [2021-03-10 21:20:20,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1333.5ms TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:20:20,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122544 states. [2021-03-10 21:20:21,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122544 to 115729. [2021-03-10 21:20:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115729 states, 115728 states have (on average 2.3181425411309275) internal successors, (268274), 115728 states have internal predecessors, (268274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115729 states to 115729 states and 268274 transitions. [2021-03-10 21:20:22,358 INFO L78 Accepts]: Start accepts. Automaton has 115729 states and 268274 transitions. Word has length 44 [2021-03-10 21:20:22,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:22,358 INFO L480 AbstractCegarLoop]: Abstraction has 115729 states and 268274 transitions. [2021-03-10 21:20:22,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:22,358 INFO L276 IsEmpty]: Start isEmpty. Operand 115729 states and 268274 transitions. [2021-03-10 21:20:22,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:20:22,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:22,413 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:22,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-03-10 21:20:22,615 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:22,615 INFO L82 PathProgramCache]: Analyzing trace with hash 220708932, now seen corresponding path program 181 times [2021-03-10 21:20:22,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:22,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577470790] [2021-03-10 21:20:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:22,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577470790] [2021-03-10 21:20:22,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289795222] [2021-03-10 21:20:22,914 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 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 [2021-03-10 21:20:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:22,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:20:22,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:20:23,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:23,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-03-10 21:20:23,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291904851] [2021-03-10 21:20:23,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:20:23,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:23,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:20:23,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:20:23,471 INFO L87 Difference]: Start difference. First operand 115729 states and 268274 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:25,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:25,390 INFO L93 Difference]: Finished difference Result 116567 states and 270039 transitions. [2021-03-10 21:20:25,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:20:25,392 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:20:25,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:25,588 INFO L225 Difference]: With dead ends: 116567 [2021-03-10 21:20:25,588 INFO L226 Difference]: Without dead ends: 116541 [2021-03-10 21:20:25,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1070.6ms TimeCoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:20:25,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116541 states. [2021-03-10 21:20:27,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116541 to 116235. [2021-03-10 21:20:27,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116235 states, 116234 states have (on average 2.317944835418208) internal successors, (269424), 116234 states have internal predecessors, (269424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116235 states to 116235 states and 269424 transitions. [2021-03-10 21:20:27,915 INFO L78 Accepts]: Start accepts. Automaton has 116235 states and 269424 transitions. Word has length 44 [2021-03-10 21:20:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:27,915 INFO L480 AbstractCegarLoop]: Abstraction has 116235 states and 269424 transitions. [2021-03-10 21:20:27,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:27,915 INFO L276 IsEmpty]: Start isEmpty. Operand 116235 states and 269424 transitions. [2021-03-10 21:20:27,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:20:27,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:27,956 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:28,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:28,167 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:28,167 INFO L82 PathProgramCache]: Analyzing trace with hash 623189884, now seen corresponding path program 182 times [2021-03-10 21:20:28,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:28,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762892769] [2021-03-10 21:20:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:28,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762892769] [2021-03-10 21:20:28,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857752847] [2021-03-10 21:20:28,473 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 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 [2021-03-10 21:20:28,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:20:28,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:28,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:20:28,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:20:29,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:29,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-03-10 21:20:29,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984973589] [2021-03-10 21:20:29,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:20:29,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:29,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:20:29,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:20:29,077 INFO L87 Difference]: Start difference. First operand 116235 states and 269424 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:31,257 INFO L93 Difference]: Finished difference Result 120186 states and 278104 transitions. [2021-03-10 21:20:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:20:31,259 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:20:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:31,877 INFO L225 Difference]: With dead ends: 120186 [2021-03-10 21:20:31,878 INFO L226 Difference]: Without dead ends: 120151 [2021-03-10 21:20:31,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1142.8ms TimeCoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:20:31,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120151 states. [2021-03-10 21:20:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120151 to 118696. [2021-03-10 21:20:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118696 states, 118695 states have (on average 2.3184548633051096) internal successors, (275189), 118695 states have internal predecessors, (275189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118696 states to 118696 states and 275189 transitions. [2021-03-10 21:20:33,646 INFO L78 Accepts]: Start accepts. Automaton has 118696 states and 275189 transitions. Word has length 44 [2021-03-10 21:20:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:33,646 INFO L480 AbstractCegarLoop]: Abstraction has 118696 states and 275189 transitions. [2021-03-10 21:20:33,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 118696 states and 275189 transitions. [2021-03-10 21:20:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:20:33,699 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:33,699 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:33,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:33,900 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:33,900 INFO L82 PathProgramCache]: Analyzing trace with hash 538134874, now seen corresponding path program 183 times [2021-03-10 21:20:33,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:33,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014120221] [2021-03-10 21:20:33,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:34,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014120221] [2021-03-10 21:20:34,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139216261] [2021-03-10 21:20:34,201 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 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 [2021-03-10 21:20:34,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:20:34,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:34,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:20:34,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:20:34,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:34,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:20:34,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046522373] [2021-03-10 21:20:34,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:20:34,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:34,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:20:34,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:20:34,833 INFO L87 Difference]: Start difference. First operand 118696 states and 275189 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:38,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:38,239 INFO L93 Difference]: Finished difference Result 121717 states and 281691 transitions. [2021-03-10 21:20:38,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:20:38,240 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:20:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:38,449 INFO L225 Difference]: With dead ends: 121717 [2021-03-10 21:20:38,449 INFO L226 Difference]: Without dead ends: 121674 [2021-03-10 21:20:38,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1453.4ms TimeCoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:20:38,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121674 states. [2021-03-10 21:20:40,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121674 to 120316. [2021-03-10 21:20:40,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120316 states, 120315 states have (on average 2.3182146864480737) internal successors, (278916), 120315 states have internal predecessors, (278916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120316 states to 120316 states and 278916 transitions. [2021-03-10 21:20:40,960 INFO L78 Accepts]: Start accepts. Automaton has 120316 states and 278916 transitions. Word has length 44 [2021-03-10 21:20:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:40,960 INFO L480 AbstractCegarLoop]: Abstraction has 120316 states and 278916 transitions. [2021-03-10 21:20:40,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 120316 states and 278916 transitions. [2021-03-10 21:20:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:20:41,008 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:41,009 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:41,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-03-10 21:20:41,209 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:41,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:41,209 INFO L82 PathProgramCache]: Analyzing trace with hash 300697604, now seen corresponding path program 184 times [2021-03-10 21:20:41,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:41,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905579073] [2021-03-10 21:20:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:41,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905579073] [2021-03-10 21:20:41,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058727423] [2021-03-10 21:20:41,508 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 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 [2021-03-10 21:20:41,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:20:41,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:41,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:20:41,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:20:42,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:42,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-03-10 21:20:42,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466426670] [2021-03-10 21:20:42,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:20:42,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:42,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:20:42,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:20:42,177 INFO L87 Difference]: Start difference. First operand 120316 states and 278916 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:44,360 INFO L93 Difference]: Finished difference Result 124683 states and 288562 transitions. [2021-03-10 21:20:44,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:20:44,362 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:20:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:44,575 INFO L225 Difference]: With dead ends: 124683 [2021-03-10 21:20:44,576 INFO L226 Difference]: Without dead ends: 124640 [2021-03-10 21:20:44,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1208.5ms TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:20:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124640 states. [2021-03-10 21:20:46,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124640 to 123298. [2021-03-10 21:20:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123298 states, 123297 states have (on average 2.3185722280347454) internal successors, (285873), 123297 states have internal predecessors, (285873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123298 states to 123298 states and 285873 transitions. [2021-03-10 21:20:46,564 INFO L78 Accepts]: Start accepts. Automaton has 123298 states and 285873 transitions. Word has length 44 [2021-03-10 21:20:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:46,565 INFO L480 AbstractCegarLoop]: Abstraction has 123298 states and 285873 transitions. [2021-03-10 21:20:46,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 123298 states and 285873 transitions. [2021-03-10 21:20:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:20:46,613 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:46,613 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:46,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:46,813 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:46,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:46,814 INFO L82 PathProgramCache]: Analyzing trace with hash 787269176, now seen corresponding path program 185 times [2021-03-10 21:20:46,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:46,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782098532] [2021-03-10 21:20:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:47,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782098532] [2021-03-10 21:20:47,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114853163] [2021-03-10 21:20:47,125 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 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 [2021-03-10 21:20:47,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:20:47,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:47,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:20:47,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:48,079 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-03-10 21:20:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:20:48,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:48,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:20:48,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532121914] [2021-03-10 21:20:48,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:20:48,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:48,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:20:48,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:20:48,229 INFO L87 Difference]: Start difference. First operand 123298 states and 285873 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:50,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:50,106 INFO L93 Difference]: Finished difference Result 124836 states and 289269 transitions. [2021-03-10 21:20:50,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:20:50,107 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:20:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:50,288 INFO L225 Difference]: With dead ends: 124836 [2021-03-10 21:20:50,288 INFO L226 Difference]: Without dead ends: 124802 [2021-03-10 21:20:50,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1179.1ms TimeCoverageRelationStatistics Valid=131, Invalid=1351, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:20:50,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124802 states. [2021-03-10 21:20:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124802 to 124438. [2021-03-10 21:20:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124438 states, 124437 states have (on average 2.3188521099030033) internal successors, (288551), 124437 states have internal predecessors, (288551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124438 states to 124438 states and 288551 transitions. [2021-03-10 21:20:52,462 INFO L78 Accepts]: Start accepts. Automaton has 124438 states and 288551 transitions. Word has length 44 [2021-03-10 21:20:52,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:52,462 INFO L480 AbstractCegarLoop]: Abstraction has 124438 states and 288551 transitions. [2021-03-10 21:20:52,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:52,462 INFO L276 IsEmpty]: Start isEmpty. Operand 124438 states and 288551 transitions. [2021-03-10 21:20:52,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:20:52,522 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:52,522 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:52,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:52,723 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:52,723 INFO L82 PathProgramCache]: Analyzing trace with hash -451380224, now seen corresponding path program 186 times [2021-03-10 21:20:52,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:52,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975553432] [2021-03-10 21:20:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:53,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975553432] [2021-03-10 21:20:53,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904619001] [2021-03-10 21:20:53,028 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 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 [2021-03-10 21:20:53,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:20:53,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:53,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:20:53,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:20:53,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:53,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-03-10 21:20:53,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351316721] [2021-03-10 21:20:53,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 21:20:53,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:53,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 21:20:53,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:20:53,813 INFO L87 Difference]: Start difference. First operand 124438 states and 288551 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:57,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:57,241 INFO L93 Difference]: Finished difference Result 131445 states and 303815 transitions. [2021-03-10 21:20:57,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 21:20:57,242 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:20:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:57,426 INFO L225 Difference]: With dead ends: 131445 [2021-03-10 21:20:57,426 INFO L226 Difference]: Without dead ends: 131411 [2021-03-10 21:20:57,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1819.4ms TimeCoverageRelationStatistics Valid=208, Invalid=2654, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 21:20:57,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131411 states. [2021-03-10 21:20:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131411 to 127435. [2021-03-10 21:20:59,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127435 states, 127434 states have (on average 2.3191299025377843) internal successors, (295536), 127434 states have internal predecessors, (295536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127435 states to 127435 states and 295536 transitions. [2021-03-10 21:20:59,667 INFO L78 Accepts]: Start accepts. Automaton has 127435 states and 295536 transitions. Word has length 44 [2021-03-10 21:20:59,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:59,667 INFO L480 AbstractCegarLoop]: Abstraction has 127435 states and 295536 transitions. [2021-03-10 21:20:59,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:59,667 INFO L276 IsEmpty]: Start isEmpty. Operand 127435 states and 295536 transitions. [2021-03-10 21:20:59,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:20:59,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:59,730 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:59,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:59,930 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:59,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:59,930 INFO L82 PathProgramCache]: Analyzing trace with hash -48899272, now seen corresponding path program 187 times [2021-03-10 21:20:59,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:59,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357543794] [2021-03-10 21:20:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:00,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357543794] [2021-03-10 21:21:00,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448141403] [2021-03-10 21:21:00,261 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 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 [2021-03-10 21:21:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:00,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:21:00,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:00,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:00,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-03-10 21:21:00,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789028253] [2021-03-10 21:21:00,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:21:00,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:00,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:21:00,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:21:00,923 INFO L87 Difference]: Start difference. First operand 127435 states and 295536 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:03,147 INFO L93 Difference]: Finished difference Result 127848 states and 296398 transitions. [2021-03-10 21:21:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:21:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:21:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:03,336 INFO L225 Difference]: With dead ends: 127848 [2021-03-10 21:21:03,336 INFO L226 Difference]: Without dead ends: 127814 [2021-03-10 21:21:03,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1422.4ms TimeCoverageRelationStatistics Valid=158, Invalid=1822, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:21:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127814 states. [2021-03-10 21:21:04,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127814 to 127775. [2021-03-10 21:21:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127775 states, 127774 states have (on average 2.318585940801728) internal successors, (296255), 127774 states have internal predecessors, (296255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127775 states to 127775 states and 296255 transitions. [2021-03-10 21:21:05,163 INFO L78 Accepts]: Start accepts. Automaton has 127775 states and 296255 transitions. Word has length 44 [2021-03-10 21:21:05,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:05,163 INFO L480 AbstractCegarLoop]: Abstraction has 127775 states and 296255 transitions. [2021-03-10 21:21:05,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:05,163 INFO L276 IsEmpty]: Start isEmpty. Operand 127775 states and 296255 transitions. [2021-03-10 21:21:05,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:21:05,221 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:05,221 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:05,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-03-10 21:21:05,421 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:05,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:05,421 INFO L82 PathProgramCache]: Analyzing trace with hash -728791296, now seen corresponding path program 188 times [2021-03-10 21:21:05,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:05,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992761289] [2021-03-10 21:21:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:06,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992761289] [2021-03-10 21:21:06,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604534761] [2021-03-10 21:21:06,225 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 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 [2021-03-10 21:21:06,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:21:06,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:06,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:21:06,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:21:06,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:06,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:21:06,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641507678] [2021-03-10 21:21:06,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:21:06,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:06,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:21:06,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:21:06,874 INFO L87 Difference]: Start difference. First operand 127775 states and 296255 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:09,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:09,074 INFO L93 Difference]: Finished difference Result 135363 states and 313182 transitions. [2021-03-10 21:21:09,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:21:09,075 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:21:09,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:09,276 INFO L225 Difference]: With dead ends: 135363 [2021-03-10 21:21:09,276 INFO L226 Difference]: Without dead ends: 135320 [2021-03-10 21:21:09,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1950.5ms TimeCoverageRelationStatistics Valid=174, Invalid=2082, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:21:09,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135320 states. [2021-03-10 21:21:11,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135320 to 127786. [2021-03-10 21:21:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127786 states, 127785 states have (on average 2.3186211214148766) internal successors, (296285), 127785 states have internal predecessors, (296285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127786 states to 127786 states and 296285 transitions. [2021-03-10 21:21:11,385 INFO L78 Accepts]: Start accepts. Automaton has 127786 states and 296285 transitions. Word has length 44 [2021-03-10 21:21:11,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:11,385 INFO L480 AbstractCegarLoop]: Abstraction has 127786 states and 296285 transitions. [2021-03-10 21:21:11,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 127786 states and 296285 transitions. [2021-03-10 21:21:11,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:21:11,443 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:11,443 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:11,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-03-10 21:21:11,644 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:11,644 INFO L82 PathProgramCache]: Analyzing trace with hash 475376078, now seen corresponding path program 189 times [2021-03-10 21:21:11,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:11,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969138370] [2021-03-10 21:21:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:12,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969138370] [2021-03-10 21:21:12,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772529790] [2021-03-10 21:21:12,096 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 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 [2021-03-10 21:21:12,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:21:12,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:12,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:21:12,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:12,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:12,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:21:12,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543585210] [2021-03-10 21:21:12,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:21:12,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:12,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:21:12,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:21:12,672 INFO L87 Difference]: Start difference. First operand 127786 states and 296285 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:14,985 INFO L93 Difference]: Finished difference Result 128874 states and 298650 transitions. [2021-03-10 21:21:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:21:14,987 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:21:14,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:15,162 INFO L225 Difference]: With dead ends: 128874 [2021-03-10 21:21:15,162 INFO L226 Difference]: Without dead ends: 128840 [2021-03-10 21:21:15,162 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1440.4ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:21:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128840 states. [2021-03-10 21:21:17,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128840 to 128388. [2021-03-10 21:21:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128388 states, 128387 states have (on average 2.3188562704946762) internal successors, (297711), 128387 states have internal predecessors, (297711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128388 states to 128388 states and 297711 transitions. [2021-03-10 21:21:17,437 INFO L78 Accepts]: Start accepts. Automaton has 128388 states and 297711 transitions. Word has length 44 [2021-03-10 21:21:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:17,437 INFO L480 AbstractCegarLoop]: Abstraction has 128388 states and 297711 transitions. [2021-03-10 21:21:17,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 128388 states and 297711 transitions. [2021-03-10 21:21:17,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:21:17,489 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:17,489 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:17,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:17,689 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:17,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:17,690 INFO L82 PathProgramCache]: Analyzing trace with hash 434659222, now seen corresponding path program 190 times [2021-03-10 21:21:17,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:17,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154916044] [2021-03-10 21:21:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:17,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154916044] [2021-03-10 21:21:17,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000488211] [2021-03-10 21:21:17,996 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 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 [2021-03-10 21:21:18,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:21:18,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:18,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:21:18,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:18,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:18,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-03-10 21:21:18,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270094756] [2021-03-10 21:21:18,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:21:18,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:18,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:21:18,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:21:18,582 INFO L87 Difference]: Start difference. First operand 128388 states and 297711 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:20,683 INFO L93 Difference]: Finished difference Result 128806 states and 298588 transitions. [2021-03-10 21:21:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:21:20,684 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:21:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:21,061 INFO L225 Difference]: With dead ends: 128806 [2021-03-10 21:21:21,061 INFO L226 Difference]: Without dead ends: 128772 [2021-03-10 21:21:21,061 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1199.3ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:21:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128772 states. [2021-03-10 21:21:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128772 to 128723. [2021-03-10 21:21:22,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128723 states, 128722 states have (on average 2.318407109895744) internal successors, (298430), 128722 states have internal predecessors, (298430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128723 states to 128723 states and 298430 transitions. [2021-03-10 21:21:23,001 INFO L78 Accepts]: Start accepts. Automaton has 128723 states and 298430 transitions. Word has length 44 [2021-03-10 21:21:23,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:23,002 INFO L480 AbstractCegarLoop]: Abstraction has 128723 states and 298430 transitions. [2021-03-10 21:21:23,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:23,002 INFO L276 IsEmpty]: Start isEmpty. Operand 128723 states and 298430 transitions. [2021-03-10 21:21:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:21:23,062 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:23,062 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:23,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-03-10 21:21:23,262 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:23,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:23,263 INFO L82 PathProgramCache]: Analyzing trace with hash 837140174, now seen corresponding path program 191 times [2021-03-10 21:21:23,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:23,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407595694] [2021-03-10 21:21:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:23,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407595694] [2021-03-10 21:21:23,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588374757] [2021-03-10 21:21:23,568 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 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 [2021-03-10 21:21:23,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:21:23,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:23,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:21:23,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:24,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:24,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-03-10 21:21:24,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79764368] [2021-03-10 21:21:24,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:21:24,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:21:24,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:21:24,215 INFO L87 Difference]: Start difference. First operand 128723 states and 298430 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:26,887 INFO L93 Difference]: Finished difference Result 131900 states and 305203 transitions. [2021-03-10 21:21:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:21:26,888 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:21:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:27,080 INFO L225 Difference]: With dead ends: 131900 [2021-03-10 21:21:27,081 INFO L226 Difference]: Without dead ends: 131866 [2021-03-10 21:21:27,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1406.9ms TimeCoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:21:27,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131866 states. [2021-03-10 21:21:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131866 to 129310. [2021-03-10 21:21:29,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129310 states, 129309 states have (on average 2.3184310450162013) internal successors, (299794), 129309 states have internal predecessors, (299794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129310 states to 129310 states and 299794 transitions. [2021-03-10 21:21:29,329 INFO L78 Accepts]: Start accepts. Automaton has 129310 states and 299794 transitions. Word has length 44 [2021-03-10 21:21:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:29,329 INFO L480 AbstractCegarLoop]: Abstraction has 129310 states and 299794 transitions. [2021-03-10 21:21:29,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:29,329 INFO L276 IsEmpty]: Start isEmpty. Operand 129310 states and 299794 transitions. [2021-03-10 21:21:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:21:29,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:29,390 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:29,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-03-10 21:21:29,590 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:29,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:29,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1110209028, now seen corresponding path program 192 times [2021-03-10 21:21:29,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:29,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143120724] [2021-03-10 21:21:29,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:29,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143120724] [2021-03-10 21:21:29,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292083657] [2021-03-10 21:21:29,898 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 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 [2021-03-10 21:21:29,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:21:29,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:29,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:21:29,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:21:30,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:30,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:21:30,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181456755] [2021-03-10 21:21:30,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:21:30,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:30,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:21:30,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:21:30,571 INFO L87 Difference]: Start difference. First operand 129310 states and 299794 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:33,124 INFO L93 Difference]: Finished difference Result 138710 states and 320991 transitions. [2021-03-10 21:21:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:21:33,125 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:21:33,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:33,317 INFO L225 Difference]: With dead ends: 138710 [2021-03-10 21:21:33,318 INFO L226 Difference]: Without dead ends: 138667 [2021-03-10 21:21:33,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1375.4ms TimeCoverageRelationStatistics Valid=156, Invalid=1824, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:21:33,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138667 states. [2021-03-10 21:21:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138667 to 135897. [2021-03-10 21:21:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135897 states, 135896 states have (on average 2.319663566256549) internal successors, (315233), 135896 states have internal predecessors, (315233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135897 states to 135897 states and 315233 transitions. [2021-03-10 21:21:35,769 INFO L78 Accepts]: Start accepts. Automaton has 135897 states and 315233 transitions. Word has length 44 [2021-03-10 21:21:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:35,769 INFO L480 AbstractCegarLoop]: Abstraction has 135897 states and 315233 transitions. [2021-03-10 21:21:35,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 135897 states and 315233 transitions. [2021-03-10 21:21:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:21:35,830 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:35,830 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:36,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-03-10 21:21:36,030 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:36,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:36,030 INFO L82 PathProgramCache]: Analyzing trace with hash 796764494, now seen corresponding path program 193 times [2021-03-10 21:21:36,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:36,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303049581] [2021-03-10 21:21:36,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:36,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303049581] [2021-03-10 21:21:36,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817375822] [2021-03-10 21:21:36,343 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 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 [2021-03-10 21:21:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:36,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:21:36,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:36,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:36,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:21:36,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189639782] [2021-03-10 21:21:36,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:21:36,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:36,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:21:36,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:21:36,900 INFO L87 Difference]: Start difference. First operand 135897 states and 315233 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:39,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:39,484 INFO L93 Difference]: Finished difference Result 136993 states and 317620 transitions. [2021-03-10 21:21:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:21:39,485 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:21:39,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:39,698 INFO L225 Difference]: With dead ends: 136993 [2021-03-10 21:21:39,698 INFO L226 Difference]: Without dead ends: 136959 [2021-03-10 21:21:39,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1266.8ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:21:39,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136959 states. [2021-03-10 21:21:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136959 to 136501. [2021-03-10 21:21:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136501 states, 136500 states have (on average 2.319919413919414) internal successors, (316669), 136500 states have internal predecessors, (316669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136501 states to 136501 states and 316669 transitions. [2021-03-10 21:21:42,227 INFO L78 Accepts]: Start accepts. Automaton has 136501 states and 316669 transitions. Word has length 44 [2021-03-10 21:21:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:42,227 INFO L480 AbstractCegarLoop]: Abstraction has 136501 states and 316669 transitions. [2021-03-10 21:21:42,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 136501 states and 316669 transitions. [2021-03-10 21:21:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:21:42,315 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:42,315 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:42,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:42,515 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:42,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:42,516 INFO L82 PathProgramCache]: Analyzing trace with hash 756047638, now seen corresponding path program 194 times [2021-03-10 21:21:42,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:42,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246733773] [2021-03-10 21:21:42,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:42,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246733773] [2021-03-10 21:21:42,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222872149] [2021-03-10 21:21:42,832 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 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 [2021-03-10 21:21:42,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:21:42,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:42,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:21:42,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:43,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:43,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-03-10 21:21:43,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261803561] [2021-03-10 21:21:43,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 21:21:43,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:43,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 21:21:43,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:21:43,450 INFO L87 Difference]: Start difference. First operand 136501 states and 316669 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:45,292 INFO L93 Difference]: Finished difference Result 136923 states and 317558 transitions. [2021-03-10 21:21:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:21:45,294 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:21:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:45,501 INFO L225 Difference]: With dead ends: 136923 [2021-03-10 21:21:45,501 INFO L226 Difference]: Without dead ends: 136889 [2021-03-10 21:21:45,502 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1233.8ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:21:46,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136889 states. [2021-03-10 21:21:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136889 to 136832. [2021-03-10 21:21:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136832 states, 136831 states have (on average 2.3195620875386425) internal successors, (317388), 136831 states have internal predecessors, (317388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136832 states to 136832 states and 317388 transitions. [2021-03-10 21:21:47,704 INFO L78 Accepts]: Start accepts. Automaton has 136832 states and 317388 transitions. Word has length 44 [2021-03-10 21:21:47,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:47,704 INFO L480 AbstractCegarLoop]: Abstraction has 136832 states and 317388 transitions. [2021-03-10 21:21:47,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:47,704 INFO L276 IsEmpty]: Start isEmpty. Operand 136832 states and 317388 transitions. [2021-03-10 21:21:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:21:47,765 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:47,765 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:47,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-03-10 21:21:47,965 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:47,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:47,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1158528590, now seen corresponding path program 195 times [2021-03-10 21:21:47,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:47,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16266837] [2021-03-10 21:21:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:48,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16266837] [2021-03-10 21:21:48,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060769234] [2021-03-10 21:21:48,282 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 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 [2021-03-10 21:21:48,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:21:48,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:48,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:21:48,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:21:48,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:48,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:21:48,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089166386] [2021-03-10 21:21:48,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:21:48,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:48,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:21:48,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:21:48,981 INFO L87 Difference]: Start difference. First operand 136832 states and 317388 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:52,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:52,808 INFO L93 Difference]: Finished difference Result 141699 states and 328059 transitions. [2021-03-10 21:21:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:21:52,810 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:21:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:53,008 INFO L225 Difference]: With dead ends: 141699 [2021-03-10 21:21:53,008 INFO L226 Difference]: Without dead ends: 141665 [2021-03-10 21:21:53,009 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1659.4ms TimeCoverageRelationStatistics Valid=187, Invalid=2363, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:21:53,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141665 states. [2021-03-10 21:21:54,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141665 to 138137. [2021-03-10 21:21:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138137 states, 138136 states have (on average 2.3198876469566225) internal successors, (320460), 138136 states have internal predecessors, (320460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138137 states to 138137 states and 320460 transitions. [2021-03-10 21:21:55,205 INFO L78 Accepts]: Start accepts. Automaton has 138137 states and 320460 transitions. Word has length 44 [2021-03-10 21:21:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:55,205 INFO L480 AbstractCegarLoop]: Abstraction has 138137 states and 320460 transitions. [2021-03-10 21:21:55,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 138137 states and 320460 transitions. [2021-03-10 21:21:55,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:21:55,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:55,268 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:55,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:55,468 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:55,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:55,469 INFO L82 PathProgramCache]: Analyzing trace with hash -788820612, now seen corresponding path program 196 times [2021-03-10 21:21:55,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:55,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703378606] [2021-03-10 21:21:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:55,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703378606] [2021-03-10 21:21:55,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605269867] [2021-03-10 21:21:55,821 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 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 [2021-03-10 21:21:55,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:21:55,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:55,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:21:55,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:21:56,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:56,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:21:56,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550135082] [2021-03-10 21:21:56,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:21:56,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:56,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:21:56,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:21:56,516 INFO L87 Difference]: Start difference. First operand 138137 states and 320460 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:58,999 INFO L93 Difference]: Finished difference Result 147273 states and 341086 transitions. [2021-03-10 21:21:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:21:59,001 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:21:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:59,205 INFO L225 Difference]: With dead ends: 147273 [2021-03-10 21:21:59,205 INFO L226 Difference]: Without dead ends: 147230 [2021-03-10 21:21:59,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1407.7ms TimeCoverageRelationStatistics Valid=150, Invalid=1742, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:21:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147230 states. [2021-03-10 21:22:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147230 to 144496. [2021-03-10 21:22:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144496 states, 144495 states have (on average 2.3211737430360913) internal successors, (335398), 144495 states have internal predecessors, (335398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144496 states to 144496 states and 335398 transitions. [2021-03-10 21:22:01,651 INFO L78 Accepts]: Start accepts. Automaton has 144496 states and 335398 transitions. Word has length 44 [2021-03-10 21:22:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:01,651 INFO L480 AbstractCegarLoop]: Abstraction has 144496 states and 335398 transitions. [2021-03-10 21:22:01,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 144496 states and 335398 transitions. [2021-03-10 21:22:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:22:01,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:01,714 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:01,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:01,914 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:01,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1468482648, now seen corresponding path program 197 times [2021-03-10 21:22:01,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:01,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898771155] [2021-03-10 21:22:01,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:02,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898771155] [2021-03-10 21:22:02,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28613722] [2021-03-10 21:22:02,251 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 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 [2021-03-10 21:22:02,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:22:02,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:02,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:22:02,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:03,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:03,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-03-10 21:22:03,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943655628] [2021-03-10 21:22:03,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 21:22:03,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:03,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 21:22:03,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:22:03,076 INFO L87 Difference]: Start difference. First operand 144496 states and 335398 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:06,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:06,478 INFO L93 Difference]: Finished difference Result 148037 states and 343015 transitions. [2021-03-10 21:22:06,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 21:22:06,480 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:22:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:06,697 INFO L225 Difference]: With dead ends: 148037 [2021-03-10 21:22:06,697 INFO L226 Difference]: Without dead ends: 148020 [2021-03-10 21:22:06,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1918.1ms TimeCoverageRelationStatistics Valid=206, Invalid=2656, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 21:22:06,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148020 states. [2021-03-10 21:22:08,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148020 to 145235. [2021-03-10 21:22:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145235 states, 145234 states have (on average 2.321660217304488) internal successors, (337184), 145234 states have internal predecessors, (337184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145235 states to 145235 states and 337184 transitions. [2021-03-10 21:22:09,008 INFO L78 Accepts]: Start accepts. Automaton has 145235 states and 337184 transitions. Word has length 44 [2021-03-10 21:22:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:09,008 INFO L480 AbstractCegarLoop]: Abstraction has 145235 states and 337184 transitions. [2021-03-10 21:22:09,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:09,009 INFO L276 IsEmpty]: Start isEmpty. Operand 145235 states and 337184 transitions. [2021-03-10 21:22:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:22:09,071 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:09,072 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:09,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-03-10 21:22:09,272 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:09,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:09,272 INFO L82 PathProgramCache]: Analyzing trace with hash -2050092680, now seen corresponding path program 198 times [2021-03-10 21:22:09,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:09,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814731854] [2021-03-10 21:22:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:09,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814731854] [2021-03-10 21:22:09,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434992897] [2021-03-10 21:22:09,609 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 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 [2021-03-10 21:22:09,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:22:09,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:09,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:22:09,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:10,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:10,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:22:10,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696531043] [2021-03-10 21:22:10,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:22:10,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:10,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:22:10,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:22:10,331 INFO L87 Difference]: Start difference. First operand 145235 states and 337184 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:14,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:14,756 INFO L93 Difference]: Finished difference Result 154165 states and 356569 transitions. [2021-03-10 21:22:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:22:14,758 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:22:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:14,968 INFO L225 Difference]: With dead ends: 154165 [2021-03-10 21:22:14,968 INFO L226 Difference]: Without dead ends: 154131 [2021-03-10 21:22:14,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1583.1ms TimeCoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:22:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154131 states. [2021-03-10 21:22:16,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154131 to 147119. [2021-03-10 21:22:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147119 states, 147118 states have (on average 2.3230128196413764) internal successors, (341757), 147118 states have internal predecessors, (341757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147119 states to 147119 states and 341757 transitions. [2021-03-10 21:22:17,377 INFO L78 Accepts]: Start accepts. Automaton has 147119 states and 341757 transitions. Word has length 44 [2021-03-10 21:22:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:17,377 INFO L480 AbstractCegarLoop]: Abstraction has 147119 states and 341757 transitions. [2021-03-10 21:22:17,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:17,377 INFO L276 IsEmpty]: Start isEmpty. Operand 147119 states and 341757 transitions. [2021-03-10 21:22:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:22:17,438 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:17,438 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:17,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:17,638 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:17,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:17,638 INFO L82 PathProgramCache]: Analyzing trace with hash -951636672, now seen corresponding path program 199 times [2021-03-10 21:22:17,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:17,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368525232] [2021-03-10 21:22:17,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:18,113 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-03-10 21:22:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:18,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368525232] [2021-03-10 21:22:18,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258712947] [2021-03-10 21:22:18,498 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 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 [2021-03-10 21:22:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:18,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:22:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:19,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:19,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:22:19,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265916621] [2021-03-10 21:22:19,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:22:19,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:19,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:22:19,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:22:19,080 INFO L87 Difference]: Start difference. First operand 147119 states and 341757 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:20,888 INFO L93 Difference]: Finished difference Result 147975 states and 343601 transitions. [2021-03-10 21:22:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:22:20,890 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:22:20,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:21,114 INFO L225 Difference]: With dead ends: 147975 [2021-03-10 21:22:21,114 INFO L226 Difference]: Without dead ends: 147958 [2021-03-10 21:22:21,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1222.3ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:22:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147958 states. [2021-03-10 21:22:23,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147958 to 147584. [2021-03-10 21:22:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147584 states, 147583 states have (on average 2.323268940189588) internal successors, (342875), 147583 states have internal predecessors, (342875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:23,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147584 states to 147584 states and 342875 transitions. [2021-03-10 21:22:23,479 INFO L78 Accepts]: Start accepts. Automaton has 147584 states and 342875 transitions. Word has length 44 [2021-03-10 21:22:23,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:23,479 INFO L480 AbstractCegarLoop]: Abstraction has 147584 states and 342875 transitions. [2021-03-10 21:22:23,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:23,480 INFO L276 IsEmpty]: Start isEmpty. Operand 147584 states and 342875 transitions. [2021-03-10 21:22:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:22:23,541 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:23,541 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:23,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-03-10 21:22:23,741 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:23,741 INFO L82 PathProgramCache]: Analyzing trace with hash 929097336, now seen corresponding path program 200 times [2021-03-10 21:22:23,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:23,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991434229] [2021-03-10 21:22:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:24,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991434229] [2021-03-10 21:22:24,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675209960] [2021-03-10 21:22:24,126 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 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 [2021-03-10 21:22:24,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:22:24,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:24,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:22:24,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:24,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:24,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:22:24,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32292330] [2021-03-10 21:22:24,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:22:24,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:24,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:22:24,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:22:24,728 INFO L87 Difference]: Start difference. First operand 147584 states and 342875 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:27,505 INFO L93 Difference]: Finished difference Result 148649 states and 345197 transitions. [2021-03-10 21:22:27,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:22:27,506 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:22:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:27,713 INFO L225 Difference]: With dead ends: 148649 [2021-03-10 21:22:27,713 INFO L226 Difference]: Without dead ends: 148615 [2021-03-10 21:22:27,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1387.3ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:22:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148615 states. [2021-03-10 21:22:29,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148615 to 148228. [2021-03-10 21:22:29,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148228 states, 148227 states have (on average 2.323483575866745) internal successors, (344403), 148227 states have internal predecessors, (344403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148228 states to 148228 states and 344403 transitions. [2021-03-10 21:22:30,110 INFO L78 Accepts]: Start accepts. Automaton has 148228 states and 344403 transitions. Word has length 44 [2021-03-10 21:22:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:30,110 INFO L480 AbstractCegarLoop]: Abstraction has 148228 states and 344403 transitions. [2021-03-10 21:22:30,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:30,110 INFO L276 IsEmpty]: Start isEmpty. Operand 148228 states and 344403 transitions. [2021-03-10 21:22:30,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:22:30,171 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:30,171 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:30,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-03-10 21:22:30,372 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:30,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:30,372 INFO L82 PathProgramCache]: Analyzing trace with hash 888380480, now seen corresponding path program 201 times [2021-03-10 21:22:30,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:30,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986146601] [2021-03-10 21:22:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:30,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986146601] [2021-03-10 21:22:30,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790831262] [2021-03-10 21:22:30,713 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 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 [2021-03-10 21:22:30,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:22:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:30,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:22:30,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:31,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:31,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:22:31,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107442976] [2021-03-10 21:22:31,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:22:31,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:31,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:22:31,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:22:31,459 INFO L87 Difference]: Start difference. First operand 148228 states and 344403 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:35,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:35,816 INFO L93 Difference]: Finished difference Result 153460 states and 355839 transitions. [2021-03-10 21:22:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:22:35,818 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:22:35,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:36,032 INFO L225 Difference]: With dead ends: 153460 [2021-03-10 21:22:36,032 INFO L226 Difference]: Without dead ends: 153426 [2021-03-10 21:22:36,033 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1774.9ms TimeCoverageRelationStatistics Valid=191, Invalid=2359, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:22:36,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153426 states. [2021-03-10 21:22:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153426 to 149372. [2021-03-10 21:22:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149372 states, 149371 states have (on average 2.323878128954081) internal successors, (347120), 149371 states have internal predecessors, (347120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149372 states to 149372 states and 347120 transitions. [2021-03-10 21:22:38,457 INFO L78 Accepts]: Start accepts. Automaton has 149372 states and 347120 transitions. Word has length 44 [2021-03-10 21:22:38,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:38,457 INFO L480 AbstractCegarLoop]: Abstraction has 149372 states and 347120 transitions. [2021-03-10 21:22:38,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 149372 states and 347120 transitions. [2021-03-10 21:22:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:22:38,518 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:38,518 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:38,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:38,719 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:38,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:38,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1290861432, now seen corresponding path program 202 times [2021-03-10 21:22:38,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:38,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112209909] [2021-03-10 21:22:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:39,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112209909] [2021-03-10 21:22:39,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255221145] [2021-03-10 21:22:39,062 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 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 [2021-03-10 21:22:39,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:22:39,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:39,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:22:39,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:40,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:40,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-03-10 21:22:40,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839940938] [2021-03-10 21:22:40,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:22:40,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:40,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:22:40,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:22:40,307 INFO L87 Difference]: Start difference. First operand 149372 states and 347120 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:42,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:42,183 INFO L93 Difference]: Finished difference Result 149842 states and 348098 transitions. [2021-03-10 21:22:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:22:42,185 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:22:42,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:42,392 INFO L225 Difference]: With dead ends: 149842 [2021-03-10 21:22:42,393 INFO L226 Difference]: Without dead ends: 149808 [2021-03-10 21:22:42,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1412.1ms TimeCoverageRelationStatistics Valid=141, Invalid=1499, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:22:42,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149808 states. [2021-03-10 21:22:44,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149808 to 149694. [2021-03-10 21:22:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149694 states, 149693 states have (on average 2.3235555436793973) internal successors, (347820), 149693 states have internal predecessors, (347820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:44,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149694 states to 149694 states and 347820 transitions. [2021-03-10 21:22:44,755 INFO L78 Accepts]: Start accepts. Automaton has 149694 states and 347820 transitions. Word has length 44 [2021-03-10 21:22:44,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:44,755 INFO L480 AbstractCegarLoop]: Abstraction has 149694 states and 347820 transitions. [2021-03-10 21:22:44,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:44,756 INFO L276 IsEmpty]: Start isEmpty. Operand 149694 states and 347820 transitions. [2021-03-10 21:22:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:22:44,815 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:44,815 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:45,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-03-10 21:22:45,015 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:45,016 INFO L82 PathProgramCache]: Analyzing trace with hash 610969408, now seen corresponding path program 203 times [2021-03-10 21:22:45,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:45,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44911595] [2021-03-10 21:22:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:45,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44911595] [2021-03-10 21:22:45,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074550496] [2021-03-10 21:22:45,362 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 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 [2021-03-10 21:22:45,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:22:45,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:45,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:22:45,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:22:46,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:46,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:22:46,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610171538] [2021-03-10 21:22:46,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:22:46,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:46,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:22:46,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:22:46,120 INFO L87 Difference]: Start difference. First operand 149694 states and 347820 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:49,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:49,094 INFO L93 Difference]: Finished difference Result 154647 states and 358583 transitions. [2021-03-10 21:22:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:22:49,096 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:22:49,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:49,318 INFO L225 Difference]: With dead ends: 154647 [2021-03-10 21:22:49,318 INFO L226 Difference]: Without dead ends: 154604 [2021-03-10 21:22:49,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1404.4ms TimeCoverageRelationStatistics Valid=144, Invalid=1578, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:22:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154604 states. [2021-03-10 21:22:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154604 to 151953. [2021-03-10 21:22:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151953 states, 151952 states have (on average 2.3238456881120353) internal successors, (353113), 151952 states have internal predecessors, (353113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151953 states to 151953 states and 353113 transitions. [2021-03-10 21:22:51,758 INFO L78 Accepts]: Start accepts. Automaton has 151953 states and 353113 transitions. Word has length 44 [2021-03-10 21:22:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:51,758 INFO L480 AbstractCegarLoop]: Abstraction has 151953 states and 353113 transitions. [2021-03-10 21:22:51,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 151953 states and 353113 transitions. [2021-03-10 21:22:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:22:51,821 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:51,821 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:52,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:52,022 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:52,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:52,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1336149806, now seen corresponding path program 204 times [2021-03-10 21:22:52,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:52,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252283920] [2021-03-10 21:22:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:52,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252283920] [2021-03-10 21:22:52,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166086663] [2021-03-10 21:22:52,383 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 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 [2021-03-10 21:22:52,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:22:52,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:52,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:22:52,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:53,539 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-03-10 21:22:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:53,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:53,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-03-10 21:22:53,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105742653] [2021-03-10 21:22:53,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 21:22:53,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:53,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 21:22:53,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:22:53,572 INFO L87 Difference]: Start difference. First operand 151953 states and 353113 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:57,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:57,993 INFO L93 Difference]: Finished difference Result 162794 states and 376829 transitions. [2021-03-10 21:22:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:22:57,995 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:22:57,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:58,298 INFO L225 Difference]: With dead ends: 162794 [2021-03-10 21:22:58,298 INFO L226 Difference]: Without dead ends: 162760 [2021-03-10 21:22:58,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1764.4ms TimeCoverageRelationStatistics Valid=177, Invalid=2373, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:22:58,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162760 states. [2021-03-10 21:23:00,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162760 to 155259. [2021-03-10 21:23:00,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155259 states, 155258 states have (on average 2.325992863491736) internal successors, (361129), 155258 states have internal predecessors, (361129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155259 states to 155259 states and 361129 transitions. [2021-03-10 21:23:00,878 INFO L78 Accepts]: Start accepts. Automaton has 155259 states and 361129 transitions. Word has length 44 [2021-03-10 21:23:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:00,878 INFO L480 AbstractCegarLoop]: Abstraction has 155259 states and 361129 transitions. [2021-03-10 21:23:00,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 155259 states and 361129 transitions. [2021-03-10 21:23:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:23:00,944 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:00,945 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:01,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-03-10 21:23:01,145 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:01,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:01,146 INFO L82 PathProgramCache]: Analyzing trace with hash -978146052, now seen corresponding path program 205 times [2021-03-10 21:23:01,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:01,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744069058] [2021-03-10 21:23:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:01,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744069058] [2021-03-10 21:23:01,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054282119] [2021-03-10 21:23:01,508 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 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 [2021-03-10 21:23:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:01,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:23:01,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:02,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:02,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:23:02,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31720923] [2021-03-10 21:23:02,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:23:02,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:02,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:23:02,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:23:02,160 INFO L87 Difference]: Start difference. First operand 155259 states and 361129 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:04,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:04,526 INFO L93 Difference]: Finished difference Result 156045 states and 362832 transitions. [2021-03-10 21:23:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:23:04,528 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:23:04,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:04,749 INFO L225 Difference]: With dead ends: 156045 [2021-03-10 21:23:04,749 INFO L226 Difference]: Without dead ends: 156028 [2021-03-10 21:23:04,749 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1235.9ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:23:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156028 states. [2021-03-10 21:23:06,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156028 to 155729. [2021-03-10 21:23:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155729 states, 155728 states have (on average 2.3262290660639064) internal successors, (362259), 155728 states have internal predecessors, (362259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155729 states to 155729 states and 362259 transitions. [2021-03-10 21:23:07,353 INFO L78 Accepts]: Start accepts. Automaton has 155729 states and 362259 transitions. Word has length 44 [2021-03-10 21:23:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:07,354 INFO L480 AbstractCegarLoop]: Abstraction has 155729 states and 362259 transitions. [2021-03-10 21:23:07,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,354 INFO L276 IsEmpty]: Start isEmpty. Operand 155729 states and 362259 transitions. [2021-03-10 21:23:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 21:23:07,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:07,413 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:07,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:07,614 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:07,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:07,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1891878054, now seen corresponding path program 206 times [2021-03-10 21:23:07,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:07,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678295428] [2021-03-10 21:23:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:07,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678295428] [2021-03-10 21:23:07,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841704162] [2021-03-10 21:23:07,971 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 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 [2021-03-10 21:23:07,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:07,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:07,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 21:23:07,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:08,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:08,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-03-10 21:23:08,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008444040] [2021-03-10 21:23:08,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:23:08,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:08,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:23:08,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:23:08,617 INFO L87 Difference]: Start difference. First operand 155729 states and 362259 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:11,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:11,037 INFO L93 Difference]: Finished difference Result 156514 states and 363952 transitions. [2021-03-10 21:23:11,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:23:11,038 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 21:23:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:11,255 INFO L225 Difference]: With dead ends: 156514 [2021-03-10 21:23:11,255 INFO L226 Difference]: Without dead ends: 156497 [2021-03-10 21:23:11,256 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1264.5ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:23:11,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156497 states. [2021-03-10 21:23:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156497 to 156189. [2021-03-10 21:23:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156189 states, 156188 states have (on average 2.32645913898635) internal successors, (363365), 156188 states have internal predecessors, (363365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156189 states to 156189 states and 363365 transitions. [2021-03-10 21:23:13,848 INFO L78 Accepts]: Start accepts. Automaton has 156189 states and 363365 transitions. Word has length 44 [2021-03-10 21:23:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:13,849 INFO L480 AbstractCegarLoop]: Abstraction has 156189 states and 363365 transitions. [2021-03-10 21:23:13,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand 156189 states and 363365 transitions. [2021-03-10 21:23:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:23:13,911 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:13,911 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:14,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-03-10 21:23:14,112 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1728055526, now seen corresponding path program 207 times [2021-03-10 21:23:14,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:14,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806217474] [2021-03-10 21:23:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:14,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806217474] [2021-03-10 21:23:14,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862196385] [2021-03-10 21:23:14,159 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 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 [2021-03-10 21:23:14,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:23:14,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:14,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:14,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:23:14,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:14,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:23:14,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835333381] [2021-03-10 21:23:14,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:14,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:14,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:14,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:14,313 INFO L87 Difference]: Start difference. First operand 156189 states and 363365 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:14,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:14,868 INFO L93 Difference]: Finished difference Result 158663 states and 368214 transitions. [2021-03-10 21:23:14,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:14,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:23:14,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:15,615 INFO L225 Difference]: With dead ends: 158663 [2021-03-10 21:23:15,616 INFO L226 Difference]: Without dead ends: 158660 [2021-03-10 21:23:15,616 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:15,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158660 states. [2021-03-10 21:23:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158660 to 156670. [2021-03-10 21:23:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156670 states, 156669 states have (on average 2.3263951387958053) internal successors, (364474), 156669 states have internal predecessors, (364474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156670 states to 156670 states and 364474 transitions. [2021-03-10 21:23:18,338 INFO L78 Accepts]: Start accepts. Automaton has 156670 states and 364474 transitions. Word has length 45 [2021-03-10 21:23:18,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:18,338 INFO L480 AbstractCegarLoop]: Abstraction has 156670 states and 364474 transitions. [2021-03-10 21:23:18,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:18,338 INFO L276 IsEmpty]: Start isEmpty. Operand 156670 states and 364474 transitions. [2021-03-10 21:23:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:23:18,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:18,403 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:18,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-03-10 21:23:18,603 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:18,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:18,603 INFO L82 PathProgramCache]: Analyzing trace with hash 673568842, now seen corresponding path program 208 times [2021-03-10 21:23:18,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:18,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698450333] [2021-03-10 21:23:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:18,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698450333] [2021-03-10 21:23:18,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991487336] [2021-03-10 21:23:18,648 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:18,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:18,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:18,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:18,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:23:18,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:18,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:23:18,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013550417] [2021-03-10 21:23:18,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:18,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:18,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:18,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:18,807 INFO L87 Difference]: Start difference. First operand 156670 states and 364474 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:19,420 INFO L93 Difference]: Finished difference Result 183701 states and 427253 transitions. [2021-03-10 21:23:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:19,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:23:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:19,691 INFO L225 Difference]: With dead ends: 183701 [2021-03-10 21:23:19,691 INFO L226 Difference]: Without dead ends: 183701 [2021-03-10 21:23:19,691 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:19,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183701 states. [2021-03-10 21:23:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183701 to 177881. [2021-03-10 21:23:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177881 states, 177880 states have (on average 2.3365639757139647) internal successors, (415628), 177880 states have internal predecessors, (415628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177881 states to 177881 states and 415628 transitions. [2021-03-10 21:23:23,310 INFO L78 Accepts]: Start accepts. Automaton has 177881 states and 415628 transitions. Word has length 45 [2021-03-10 21:23:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:23,310 INFO L480 AbstractCegarLoop]: Abstraction has 177881 states and 415628 transitions. [2021-03-10 21:23:23,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 177881 states and 415628 transitions. [2021-03-10 21:23:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:23:23,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:23,373 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:23,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:23,573 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:23,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:23,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1350623474, now seen corresponding path program 209 times [2021-03-10 21:23:23,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:23,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639360977] [2021-03-10 21:23:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:23:23,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639360977] [2021-03-10 21:23:23,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9188874] [2021-03-10 21:23:23,619 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 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 [2021-03-10 21:23:23,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:23:23,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:23,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:23,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:23:23,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:23,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:23:23,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610472427] [2021-03-10 21:23:23,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:23,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:23,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:23,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:23,771 INFO L87 Difference]: Start difference. First operand 177881 states and 415628 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:24,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:24,398 INFO L93 Difference]: Finished difference Result 180381 states and 420212 transitions. [2021-03-10 21:23:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:24,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:23:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:24,640 INFO L225 Difference]: With dead ends: 180381 [2021-03-10 21:23:24,641 INFO L226 Difference]: Without dead ends: 180357 [2021-03-10 21:23:24,641 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:24,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180357 states. [2021-03-10 21:23:27,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180357 to 177716. [2021-03-10 21:23:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177716 states, 177715 states have (on average 2.3318965759783925) internal successors, (414413), 177715 states have internal predecessors, (414413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177716 states to 177716 states and 414413 transitions. [2021-03-10 21:23:28,165 INFO L78 Accepts]: Start accepts. Automaton has 177716 states and 414413 transitions. Word has length 45 [2021-03-10 21:23:28,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:28,165 INFO L480 AbstractCegarLoop]: Abstraction has 177716 states and 414413 transitions. [2021-03-10 21:23:28,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:28,165 INFO L276 IsEmpty]: Start isEmpty. Operand 177716 states and 414413 transitions. [2021-03-10 21:23:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:23:28,232 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:28,233 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:28,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-03-10 21:23:28,433 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:28,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:28,433 INFO L82 PathProgramCache]: Analyzing trace with hash -286948982, now seen corresponding path program 210 times [2021-03-10 21:23:28,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:28,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540035022] [2021-03-10 21:23:28,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:28,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540035022] [2021-03-10 21:23:28,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083371962] [2021-03-10 21:23:28,488 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 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 [2021-03-10 21:23:28,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:23:28,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:28,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:28,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:23:28,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:28,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:23:28,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995500641] [2021-03-10 21:23:28,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:28,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:28,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:28,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:28,640 INFO L87 Difference]: Start difference. First operand 177716 states and 414413 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:29,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:29,322 INFO L93 Difference]: Finished difference Result 180087 states and 418773 transitions. [2021-03-10 21:23:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:29,324 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:23:29,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:29,581 INFO L225 Difference]: With dead ends: 180087 [2021-03-10 21:23:29,582 INFO L226 Difference]: Without dead ends: 180075 [2021-03-10 21:23:29,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:29,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180075 states. [2021-03-10 21:23:32,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180075 to 177716. [2021-03-10 21:23:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177716 states, 177715 states have (on average 2.3297020510367723) internal successors, (414023), 177715 states have internal predecessors, (414023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177716 states to 177716 states and 414023 transitions. [2021-03-10 21:23:33,265 INFO L78 Accepts]: Start accepts. Automaton has 177716 states and 414023 transitions. Word has length 45 [2021-03-10 21:23:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:33,266 INFO L480 AbstractCegarLoop]: Abstraction has 177716 states and 414023 transitions. [2021-03-10 21:23:33,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:33,266 INFO L276 IsEmpty]: Start isEmpty. Operand 177716 states and 414023 transitions. [2021-03-10 21:23:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:23:33,330 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:33,330 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:33,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-03-10 21:23:33,531 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:33,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:33,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1882064834, now seen corresponding path program 211 times [2021-03-10 21:23:33,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:33,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150139446] [2021-03-10 21:23:33,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:33,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150139446] [2021-03-10 21:23:33,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497126383] [2021-03-10 21:23:33,579 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 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 [2021-03-10 21:23:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:33,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:33,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:23:33,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:33,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:23:33,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697243754] [2021-03-10 21:23:33,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:33,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:33,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:33,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:33,739 INFO L87 Difference]: Start difference. First operand 177716 states and 414023 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:34,360 INFO L93 Difference]: Finished difference Result 193419 states and 449644 transitions. [2021-03-10 21:23:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:34,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:23:34,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:34,618 INFO L225 Difference]: With dead ends: 193419 [2021-03-10 21:23:34,618 INFO L226 Difference]: Without dead ends: 193419 [2021-03-10 21:23:34,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193419 states. [2021-03-10 21:23:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193419 to 188453. [2021-03-10 21:23:37,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188453 states, 188452 states have (on average 2.3340532337146858) internal successors, (439857), 188452 states have internal predecessors, (439857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188453 states to 188453 states and 439857 transitions. [2021-03-10 21:23:38,205 INFO L78 Accepts]: Start accepts. Automaton has 188453 states and 439857 transitions. Word has length 45 [2021-03-10 21:23:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:38,205 INFO L480 AbstractCegarLoop]: Abstraction has 188453 states and 439857 transitions. [2021-03-10 21:23:38,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 188453 states and 439857 transitions. [2021-03-10 21:23:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:23:38,267 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:38,267 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:38,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:38,468 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:38,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1205010202, now seen corresponding path program 212 times [2021-03-10 21:23:38,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:38,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792552629] [2021-03-10 21:23:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:23:38,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792552629] [2021-03-10 21:23:38,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730175212] [2021-03-10 21:23:38,520 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 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 [2021-03-10 21:23:38,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:38,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:38,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:38,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:23:38,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:38,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:23:38,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146428264] [2021-03-10 21:23:38,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:38,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:38,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:38,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:38,676 INFO L87 Difference]: Start difference. First operand 188453 states and 439857 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:40,039 INFO L93 Difference]: Finished difference Result 191124 states and 444736 transitions. [2021-03-10 21:23:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:40,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:23:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:40,297 INFO L225 Difference]: With dead ends: 191124 [2021-03-10 21:23:40,298 INFO L226 Difference]: Without dead ends: 191109 [2021-03-10 21:23:40,298 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191109 states. [2021-03-10 21:23:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191109 to 188396. [2021-03-10 21:23:42,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188396 states, 188395 states have (on average 2.3323602006422677) internal successors, (439405), 188395 states have internal predecessors, (439405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:43,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188396 states to 188396 states and 439405 transitions. [2021-03-10 21:23:43,345 INFO L78 Accepts]: Start accepts. Automaton has 188396 states and 439405 transitions. Word has length 45 [2021-03-10 21:23:43,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:43,345 INFO L480 AbstractCegarLoop]: Abstraction has 188396 states and 439405 transitions. [2021-03-10 21:23:43,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:43,346 INFO L276 IsEmpty]: Start isEmpty. Operand 188396 states and 439405 transitions. [2021-03-10 21:23:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:23:43,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:43,411 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:43,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-03-10 21:23:43,611 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:43,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:43,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1452384638, now seen corresponding path program 213 times [2021-03-10 21:23:43,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:43,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486775800] [2021-03-10 21:23:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:44,119 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-03-10 21:23:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:23:44,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486775800] [2021-03-10 21:23:44,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258949546] [2021-03-10 21:23:44,231 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 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 [2021-03-10 21:23:44,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:23:44,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:44,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:44,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:23:44,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:44,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:23:44,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423161314] [2021-03-10 21:23:44,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:44,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:44,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:44,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:44,501 INFO L87 Difference]: Start difference. First operand 188396 states and 439405 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:45,149 INFO L93 Difference]: Finished difference Result 191049 states and 444257 transitions. [2021-03-10 21:23:45,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:45,151 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:23:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:45,424 INFO L225 Difference]: With dead ends: 191049 [2021-03-10 21:23:45,424 INFO L226 Difference]: Without dead ends: 191028 [2021-03-10 21:23:45,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191028 states. [2021-03-10 21:23:48,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191028 to 176453. [2021-03-10 21:23:48,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176453 states, 176452 states have (on average 2.3230793643597125) internal successors, (409912), 176452 states have internal predecessors, (409912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176453 states to 176453 states and 409912 transitions. [2021-03-10 21:23:49,070 INFO L78 Accepts]: Start accepts. Automaton has 176453 states and 409912 transitions. Word has length 45 [2021-03-10 21:23:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:49,071 INFO L480 AbstractCegarLoop]: Abstraction has 176453 states and 409912 transitions. [2021-03-10 21:23:49,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:49,071 INFO L276 IsEmpty]: Start isEmpty. Operand 176453 states and 409912 transitions. [2021-03-10 21:23:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:23:49,138 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:49,139 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:49,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-03-10 21:23:49,339 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:49,339 INFO L82 PathProgramCache]: Analyzing trace with hash 397030818, now seen corresponding path program 214 times [2021-03-10 21:23:49,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:49,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486441266] [2021-03-10 21:23:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:49,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486441266] [2021-03-10 21:23:49,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12838298] [2021-03-10 21:23:49,413 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 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 [2021-03-10 21:23:49,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:49,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:49,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:49,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:23:49,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:49,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:23:49,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613850737] [2021-03-10 21:23:49,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:49,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:49,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:49,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:49,580 INFO L87 Difference]: Start difference. First operand 176453 states and 409912 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:50,317 INFO L93 Difference]: Finished difference Result 179004 states and 414579 transitions. [2021-03-10 21:23:50,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:50,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:23:50,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:50,586 INFO L225 Difference]: With dead ends: 179004 [2021-03-10 21:23:50,586 INFO L226 Difference]: Without dead ends: 178983 [2021-03-10 21:23:50,586 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:50,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178983 states. [2021-03-10 21:23:53,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178983 to 176468. [2021-03-10 21:23:53,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176468 states, 176467 states have (on average 2.322660894104847) internal successors, (409873), 176467 states have internal predecessors, (409873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:54,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176468 states to 176468 states and 409873 transitions. [2021-03-10 21:23:54,165 INFO L78 Accepts]: Start accepts. Automaton has 176468 states and 409873 transitions. Word has length 45 [2021-03-10 21:23:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:54,165 INFO L480 AbstractCegarLoop]: Abstraction has 176468 states and 409873 transitions. [2021-03-10 21:23:54,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 176468 states and 409873 transitions. [2021-03-10 21:23:54,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:23:54,228 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:54,228 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:54,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-03-10 21:23:54,428 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:54,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:54,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1822368822, now seen corresponding path program 215 times [2021-03-10 21:23:54,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:54,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750338466] [2021-03-10 21:23:54,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:54,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750338466] [2021-03-10 21:23:54,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191020965] [2021-03-10 21:23:54,490 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 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 [2021-03-10 21:23:54,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:23:54,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:54,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:54,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:23:54,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:54,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:23:54,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422467650] [2021-03-10 21:23:54,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:54,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:54,651 INFO L87 Difference]: Start difference. First operand 176468 states and 409873 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:55,311 INFO L93 Difference]: Finished difference Result 186893 states and 434659 transitions. [2021-03-10 21:23:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:55,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:23:55,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:55,569 INFO L225 Difference]: With dead ends: 186893 [2021-03-10 21:23:55,569 INFO L226 Difference]: Without dead ends: 186893 [2021-03-10 21:23:55,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:56,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186893 states. [2021-03-10 21:23:58,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186893 to 130293. [2021-03-10 21:23:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130293 states, 130292 states have (on average 2.282711141129156) internal successors, (297419), 130292 states have internal predecessors, (297419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130293 states to 130293 states and 297419 transitions. [2021-03-10 21:23:58,838 INFO L78 Accepts]: Start accepts. Automaton has 130293 states and 297419 transitions. Word has length 45 [2021-03-10 21:23:58,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:58,838 INFO L480 AbstractCegarLoop]: Abstraction has 130293 states and 297419 transitions. [2021-03-10 21:23:58,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:58,838 INFO L276 IsEmpty]: Start isEmpty. Operand 130293 states and 297419 transitions. [2021-03-10 21:23:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:23:58,911 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:58,911 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:59,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:59,111 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:59,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:59,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1440909834, now seen corresponding path program 216 times [2021-03-10 21:23:59,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:59,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400079001] [2021-03-10 21:23:59,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:59,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400079001] [2021-03-10 21:23:59,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371841665] [2021-03-10 21:23:59,162 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 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 [2021-03-10 21:23:59,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:23:59,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:59,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:59,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:23:59,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:59,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:23:59,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205657505] [2021-03-10 21:23:59,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:59,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:59,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:59,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:59,324 INFO L87 Difference]: Start difference. First operand 130293 states and 297419 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:00,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:00,289 INFO L93 Difference]: Finished difference Result 136987 states and 313402 transitions. [2021-03-10 21:24:00,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:24:00,290 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:24:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:00,480 INFO L225 Difference]: With dead ends: 136987 [2021-03-10 21:24:00,480 INFO L226 Difference]: Without dead ends: 136987 [2021-03-10 21:24:00,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:00,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136987 states. [2021-03-10 21:24:02,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136987 to 131004. [2021-03-10 21:24:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131004 states, 131003 states have (on average 2.2863369541155545) internal successors, (299517), 131003 states have internal predecessors, (299517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131004 states to 131004 states and 299517 transitions. [2021-03-10 21:24:02,965 INFO L78 Accepts]: Start accepts. Automaton has 131004 states and 299517 transitions. Word has length 45 [2021-03-10 21:24:02,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:02,966 INFO L480 AbstractCegarLoop]: Abstraction has 131004 states and 299517 transitions. [2021-03-10 21:24:02,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 131004 states and 299517 transitions. [2021-03-10 21:24:03,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:24:03,021 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:03,021 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:03,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-03-10 21:24:03,222 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:03,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:03,222 INFO L82 PathProgramCache]: Analyzing trace with hash 120349642, now seen corresponding path program 217 times [2021-03-10 21:24:03,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:03,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016620358] [2021-03-10 21:24:03,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:03,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016620358] [2021-03-10 21:24:03,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149435154] [2021-03-10 21:24:03,266 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 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 [2021-03-10 21:24:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:03,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:24:03,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:03,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:03,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:24:03,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439961086] [2021-03-10 21:24:03,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:24:03,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:03,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:24:03,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:24:03,423 INFO L87 Difference]: Start difference. First operand 131004 states and 299517 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:03,882 INFO L93 Difference]: Finished difference Result 136350 states and 310930 transitions. [2021-03-10 21:24:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:24:03,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:24:03,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:04,060 INFO L225 Difference]: With dead ends: 136350 [2021-03-10 21:24:04,060 INFO L226 Difference]: Without dead ends: 136350 [2021-03-10 21:24:04,060 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136350 states. [2021-03-10 21:24:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136350 to 133513. [2021-03-10 21:24:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133513 states, 133512 states have (on average 2.2889178500808915) internal successors, (305598), 133512 states have internal predecessors, (305598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:06,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133513 states to 133513 states and 305598 transitions. [2021-03-10 21:24:06,383 INFO L78 Accepts]: Start accepts. Automaton has 133513 states and 305598 transitions. Word has length 45 [2021-03-10 21:24:06,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:06,383 INFO L480 AbstractCegarLoop]: Abstraction has 133513 states and 305598 transitions. [2021-03-10 21:24:06,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:06,383 INFO L276 IsEmpty]: Start isEmpty. Operand 133513 states and 305598 transitions. [2021-03-10 21:24:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:24:06,445 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:06,445 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:06,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-03-10 21:24:06,646 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:06,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:06,646 INFO L82 PathProgramCache]: Analyzing trace with hash 797404274, now seen corresponding path program 218 times [2021-03-10 21:24:06,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:06,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656318006] [2021-03-10 21:24:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:06,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656318006] [2021-03-10 21:24:06,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009085656] [2021-03-10 21:24:06,689 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 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 [2021-03-10 21:24:06,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:06,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:06,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:24:06,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:06,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:06,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:24:06,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412310828] [2021-03-10 21:24:06,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:24:06,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:24:06,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:24:06,839 INFO L87 Difference]: Start difference. First operand 133513 states and 305598 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:07,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:07,808 INFO L93 Difference]: Finished difference Result 136108 states and 310337 transitions. [2021-03-10 21:24:07,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:24:07,823 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:24:07,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:08,021 INFO L225 Difference]: With dead ends: 136108 [2021-03-10 21:24:08,021 INFO L226 Difference]: Without dead ends: 136105 [2021-03-10 21:24:08,021 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136105 states. [2021-03-10 21:24:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136105 to 133512. [2021-03-10 21:24:09,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2888451138857473) internal successors, (305586), 133511 states have internal predecessors, (305586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305586 transitions. [2021-03-10 21:24:10,499 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305586 transitions. Word has length 45 [2021-03-10 21:24:10,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:10,499 INFO L480 AbstractCegarLoop]: Abstraction has 133512 states and 305586 transitions. [2021-03-10 21:24:10,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:10,500 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305586 transitions. [2021-03-10 21:24:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:24:10,556 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:10,556 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:10,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:10,756 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:10,757 INFO L82 PathProgramCache]: Analyzing trace with hash -840168182, now seen corresponding path program 219 times [2021-03-10 21:24:10,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:10,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934140807] [2021-03-10 21:24:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:10,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934140807] [2021-03-10 21:24:10,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951501412] [2021-03-10 21:24:10,804 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 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 [2021-03-10 21:24:10,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:24:10,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:10,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:24:10,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:10,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:10,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:24:10,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215679089] [2021-03-10 21:24:10,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:24:10,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:10,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:24:10,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:24:10,963 INFO L87 Difference]: Start difference. First operand 133512 states and 305586 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:11,499 INFO L93 Difference]: Finished difference Result 136143 states and 310391 transitions. [2021-03-10 21:24:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:24:11,501 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:24:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:11,697 INFO L225 Difference]: With dead ends: 136143 [2021-03-10 21:24:11,697 INFO L226 Difference]: Without dead ends: 136131 [2021-03-10 21:24:11,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:11,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136131 states. [2021-03-10 21:24:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136131 to 133512. [2021-03-10 21:24:13,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2885380230842403) internal successors, (305545), 133511 states have internal predecessors, (305545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:14,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305545 transitions. [2021-03-10 21:24:14,038 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305545 transitions. Word has length 45 [2021-03-10 21:24:14,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:14,038 INFO L480 AbstractCegarLoop]: Abstraction has 133512 states and 305545 transitions. [2021-03-10 21:24:14,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:14,038 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305545 transitions. [2021-03-10 21:24:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:24:14,096 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:14,096 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:14,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:14,297 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:14,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1895522002, now seen corresponding path program 220 times [2021-03-10 21:24:14,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:14,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96390268] [2021-03-10 21:24:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:14,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96390268] [2021-03-10 21:24:14,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597580760] [2021-03-10 21:24:14,352 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 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 [2021-03-10 21:24:14,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:14,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:14,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:24:14,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:14,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:14,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:24:14,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348863815] [2021-03-10 21:24:14,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:24:14,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:14,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:24:14,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:24:14,510 INFO L87 Difference]: Start difference. First operand 133512 states and 305545 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:15,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:15,061 INFO L93 Difference]: Finished difference Result 136170 states and 310404 transitions. [2021-03-10 21:24:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:24:15,062 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:24:15,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:15,765 INFO L225 Difference]: With dead ends: 136170 [2021-03-10 21:24:15,765 INFO L226 Difference]: Without dead ends: 136149 [2021-03-10 21:24:15,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:15,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136149 states. [2021-03-10 21:24:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136149 to 133512. [2021-03-10 21:24:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2883582626150654) internal successors, (305521), 133511 states have internal predecessors, (305521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305521 transitions. [2021-03-10 21:24:17,771 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305521 transitions. Word has length 45 [2021-03-10 21:24:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:17,771 INFO L480 AbstractCegarLoop]: Abstraction has 133512 states and 305521 transitions. [2021-03-10 21:24:17,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305521 transitions. [2021-03-10 21:24:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 21:24:18,228 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:18,228 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:18,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:18,443 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:18,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:18,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1514400394, now seen corresponding path program 221 times [2021-03-10 21:24:18,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:18,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60819737] [2021-03-10 21:24:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:18,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60819737] [2021-03-10 21:24:18,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776295217] [2021-03-10 21:24:18,509 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 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 [2021-03-10 21:24:18,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:24:18,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:18,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:24:18,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:24:18,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:18,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:24:18,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574072827] [2021-03-10 21:24:18,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:24:18,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:18,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:24:18,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:24:18,669 INFO L87 Difference]: Start difference. First operand 133512 states and 305521 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:19,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:19,303 INFO L93 Difference]: Finished difference Result 136071 states and 310197 transitions. [2021-03-10 21:24:19,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:24:19,305 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 21:24:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:19,513 INFO L225 Difference]: With dead ends: 136071 [2021-03-10 21:24:19,514 INFO L226 Difference]: Without dead ends: 136039 [2021-03-10 21:24:19,514 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:24:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136039 states. [2021-03-10 21:24:21,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136039 to 133542. [2021-03-10 21:24:21,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133542 states, 133541 states have (on average 2.2882036228573996) internal successors, (305569), 133541 states have internal predecessors, (305569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:21,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133542 states to 133542 states and 305569 transitions. [2021-03-10 21:24:21,915 INFO L78 Accepts]: Start accepts. Automaton has 133542 states and 305569 transitions. Word has length 45 [2021-03-10 21:24:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:21,915 INFO L480 AbstractCegarLoop]: Abstraction has 133542 states and 305569 transitions. [2021-03-10 21:24:21,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 133542 states and 305569 transitions. [2021-03-10 21:24:21,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:24:21,982 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:21,982 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:22,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-03-10 21:24:22,182 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:22,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:22,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1961990775, now seen corresponding path program 9 times [2021-03-10 21:24:22,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:22,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549465430] [2021-03-10 21:24:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-03-10 21:24:22,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549465430] [2021-03-10 21:24:22,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689134486] [2021-03-10 21:24:22,402 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 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 [2021-03-10 21:24:22,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:24:22,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:22,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:24:22,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-03-10 21:24:22,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:22,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-03-10 21:24:22,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779826456] [2021-03-10 21:24:22,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:24:22,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:22,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:24:22,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:24:22,751 INFO L87 Difference]: Start difference. First operand 133542 states and 305569 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:24,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:24,351 INFO L93 Difference]: Finished difference Result 133718 states and 305942 transitions. [2021-03-10 21:24:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:24:24,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:24:24,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:24,549 INFO L225 Difference]: With dead ends: 133718 [2021-03-10 21:24:24,550 INFO L226 Difference]: Without dead ends: 133571 [2021-03-10 21:24:24,550 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 875.3ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:24:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133571 states. [2021-03-10 21:24:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133571 to 133557. [2021-03-10 21:24:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133557 states, 133556 states have (on average 2.2881712540058103) internal successors, (305599), 133556 states have internal predecessors, (305599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133557 states to 133557 states and 305599 transitions. [2021-03-10 21:24:26,372 INFO L78 Accepts]: Start accepts. Automaton has 133557 states and 305599 transitions. Word has length 47 [2021-03-10 21:24:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:26,372 INFO L480 AbstractCegarLoop]: Abstraction has 133557 states and 305599 transitions. [2021-03-10 21:24:26,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 133557 states and 305599 transitions. [2021-03-10 21:24:26,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:24:26,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:26,872 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:27,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-03-10 21:24:27,072 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:27,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:27,072 INFO L82 PathProgramCache]: Analyzing trace with hash -440972218, now seen corresponding path program 222 times [2021-03-10 21:24:27,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:27,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052018142] [2021-03-10 21:24:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 8 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:24:27,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052018142] [2021-03-10 21:24:27,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689923644] [2021-03-10 21:24:27,192 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 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 [2021-03-10 21:24:27,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:24:27,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:27,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:24:27,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:24:27,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:27,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-10 21:24:27,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313239796] [2021-03-10 21:24:27,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:24:27,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:27,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:24:27,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:24:27,471 INFO L87 Difference]: Start difference. First operand 133557 states and 305599 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:28,353 INFO L93 Difference]: Finished difference Result 137787 states and 313724 transitions. [2021-03-10 21:24:28,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:24:28,355 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:24:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:28,546 INFO L225 Difference]: With dead ends: 137787 [2021-03-10 21:24:28,546 INFO L226 Difference]: Without dead ends: 137787 [2021-03-10 21:24:28,546 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 419.3ms TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:24:28,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137787 states. [2021-03-10 21:24:30,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137787 to 113111. [2021-03-10 21:24:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113111 states, 113110 states have (on average 2.262116523737954) internal successors, (255868), 113110 states have internal predecessors, (255868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113111 states to 113111 states and 255868 transitions. [2021-03-10 21:24:30,912 INFO L78 Accepts]: Start accepts. Automaton has 113111 states and 255868 transitions. Word has length 47 [2021-03-10 21:24:30,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:30,912 INFO L480 AbstractCegarLoop]: Abstraction has 113111 states and 255868 transitions. [2021-03-10 21:24:30,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:30,912 INFO L276 IsEmpty]: Start isEmpty. Operand 113111 states and 255868 transitions. [2021-03-10 21:24:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 21:24:30,976 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:30,976 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:31,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-03-10 21:24:31,176 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:31,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:31,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2005544178, now seen corresponding path program 223 times [2021-03-10 21:24:31,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:31,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491606973] [2021-03-10 21:24:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 35 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:24:31,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491606973] [2021-03-10 21:24:31,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115330208] [2021-03-10 21:24:31,293 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 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 [2021-03-10 21:24:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:31,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:24:31,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:24:31,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:31,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-10 21:24:31,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087368429] [2021-03-10 21:24:31,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:24:31,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:31,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:24:31,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:24:31,606 INFO L87 Difference]: Start difference. First operand 113111 states and 255868 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:32,648 INFO L93 Difference]: Finished difference Result 114950 states and 255694 transitions. [2021-03-10 21:24:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:24:32,650 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 21:24:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:32,805 INFO L225 Difference]: With dead ends: 114950 [2021-03-10 21:24:32,805 INFO L226 Difference]: Without dead ends: 114864 [2021-03-10 21:24:32,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 577.1ms TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:24:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114864 states. [2021-03-10 21:24:34,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114864 to 112248. [2021-03-10 21:24:34,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112248 states, 112247 states have (on average 2.195755788573414) internal successors, (246467), 112247 states have internal predecessors, (246467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112248 states to 112248 states and 246467 transitions. [2021-03-10 21:24:34,832 INFO L78 Accepts]: Start accepts. Automaton has 112248 states and 246467 transitions. Word has length 47 [2021-03-10 21:24:34,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:34,832 INFO L480 AbstractCegarLoop]: Abstraction has 112248 states and 246467 transitions. [2021-03-10 21:24:34,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 21 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:34,832 INFO L276 IsEmpty]: Start isEmpty. Operand 112248 states and 246467 transitions. [2021-03-10 21:24:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:24:34,895 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:34,895 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:35,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-03-10 21:24:35,096 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:35,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1614465931, now seen corresponding path program 224 times [2021-03-10 21:24:35,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:35,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349306565] [2021-03-10 21:24:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:35,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349306565] [2021-03-10 21:24:35,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700029788] [2021-03-10 21:24:35,160 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 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 [2021-03-10 21:24:35,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:35,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:35,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:24:35,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:35,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:35,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:24:35,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167444893] [2021-03-10 21:24:35,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:24:35,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:35,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:24:35,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:24:35,331 INFO L87 Difference]: Start difference. First operand 112248 states and 246467 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:35,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:35,840 INFO L93 Difference]: Finished difference Result 121028 states and 266884 transitions. [2021-03-10 21:24:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:24:35,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:24:35,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:36,005 INFO L225 Difference]: With dead ends: 121028 [2021-03-10 21:24:36,006 INFO L226 Difference]: Without dead ends: 120876 [2021-03-10 21:24:36,006 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:24:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120876 states. [2021-03-10 21:24:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120876 to 120076. [2021-03-10 21:24:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120076 states, 120075 states have (on average 2.2036477201748905) internal successors, (264603), 120075 states have internal predecessors, (264603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120076 states to 120076 states and 264603 transitions. [2021-03-10 21:24:38,181 INFO L78 Accepts]: Start accepts. Automaton has 120076 states and 264603 transitions. Word has length 49 [2021-03-10 21:24:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:38,181 INFO L480 AbstractCegarLoop]: Abstraction has 120076 states and 264603 transitions. [2021-03-10 21:24:38,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 120076 states and 264603 transitions. [2021-03-10 21:24:38,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:24:38,246 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:38,247 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:38,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-03-10 21:24:38,451 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:38,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:38,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1623825095, now seen corresponding path program 225 times [2021-03-10 21:24:38,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:38,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513104796] [2021-03-10 21:24:38,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:38,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513104796] [2021-03-10 21:24:38,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476743410] [2021-03-10 21:24:38,502 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 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 [2021-03-10 21:24:38,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:24:38,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:38,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:24:38,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:24:38,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:38,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:24:38,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588986653] [2021-03-10 21:24:38,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:24:38,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:38,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:24:38,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:24:38,668 INFO L87 Difference]: Start difference. First operand 120076 states and 264603 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:39,105 INFO L93 Difference]: Finished difference Result 120556 states and 265078 transitions. [2021-03-10 21:24:39,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:24:39,107 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:24:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:39,285 INFO L225 Difference]: With dead ends: 120556 [2021-03-10 21:24:39,285 INFO L226 Difference]: Without dead ends: 120556 [2021-03-10 21:24:39,285 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:39,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120556 states. [2021-03-10 21:24:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120556 to 108555. [2021-03-10 21:24:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108555 states, 108554 states have (on average 2.1871510953074047) internal successors, (237424), 108554 states have internal predecessors, (237424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108555 states to 108555 states and 237424 transitions. [2021-03-10 21:24:41,477 INFO L78 Accepts]: Start accepts. Automaton has 108555 states and 237424 transitions. Word has length 49 [2021-03-10 21:24:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:41,478 INFO L480 AbstractCegarLoop]: Abstraction has 108555 states and 237424 transitions. [2021-03-10 21:24:41,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 108555 states and 237424 transitions. [2021-03-10 21:24:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:24:41,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:41,551 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:41,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:41,751 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:41,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:41,751 INFO L82 PathProgramCache]: Analyzing trace with hash -983710975, now seen corresponding path program 226 times [2021-03-10 21:24:41,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:41,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754933948] [2021-03-10 21:24:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:41,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754933948] [2021-03-10 21:24:41,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085334160] [2021-03-10 21:24:41,800 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 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 [2021-03-10 21:24:41,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:41,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:41,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:24:41,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 57 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:24:41,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:41,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:24:41,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619610899] [2021-03-10 21:24:41,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:24:41,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:41,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:24:41,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:24:41,983 INFO L87 Difference]: Start difference. First operand 108555 states and 237424 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:42,438 INFO L93 Difference]: Finished difference Result 110417 states and 241176 transitions. [2021-03-10 21:24:42,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:24:42,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:24:42,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:42,590 INFO L225 Difference]: With dead ends: 110417 [2021-03-10 21:24:42,590 INFO L226 Difference]: Without dead ends: 110409 [2021-03-10 21:24:42,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110409 states. [2021-03-10 21:24:44,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110409 to 109477. [2021-03-10 21:24:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109477 states, 109476 states have (on average 2.187420073806131) internal successors, (239470), 109476 states have internal predecessors, (239470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109477 states to 109477 states and 239470 transitions. [2021-03-10 21:24:44,677 INFO L78 Accepts]: Start accepts. Automaton has 109477 states and 239470 transitions. Word has length 49 [2021-03-10 21:24:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:44,677 INFO L480 AbstractCegarLoop]: Abstraction has 109477 states and 239470 transitions. [2021-03-10 21:24:44,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:44,677 INFO L276 IsEmpty]: Start isEmpty. Operand 109477 states and 239470 transitions. [2021-03-10 21:24:44,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:24:44,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:44,745 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:44,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-03-10 21:24:44,945 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:44,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:44,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1389078715, now seen corresponding path program 227 times [2021-03-10 21:24:44,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:44,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870392269] [2021-03-10 21:24:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:24:44,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870392269] [2021-03-10 21:24:44,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014145882] [2021-03-10 21:24:44,989 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 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 [2021-03-10 21:24:45,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:24:45,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:45,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:24:45,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:24:45,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:45,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:24:45,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732110852] [2021-03-10 21:24:45,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:24:45,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:45,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:24:45,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:24:45,165 INFO L87 Difference]: Start difference. First operand 109477 states and 239470 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:45,600 INFO L93 Difference]: Finished difference Result 116103 states and 252486 transitions. [2021-03-10 21:24:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:24:45,602 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:24:45,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:45,757 INFO L225 Difference]: With dead ends: 116103 [2021-03-10 21:24:45,757 INFO L226 Difference]: Without dead ends: 116100 [2021-03-10 21:24:45,757 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:45,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116100 states. [2021-03-10 21:24:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116100 to 110735. [2021-03-10 21:24:47,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110735 states, 110734 states have (on average 2.1854714902378674) internal successors, (242006), 110734 states have internal predecessors, (242006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110735 states to 110735 states and 242006 transitions. [2021-03-10 21:24:47,783 INFO L78 Accepts]: Start accepts. Automaton has 110735 states and 242006 transitions. Word has length 49 [2021-03-10 21:24:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:47,783 INFO L480 AbstractCegarLoop]: Abstraction has 110735 states and 242006 transitions. [2021-03-10 21:24:47,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:47,783 INFO L276 IsEmpty]: Start isEmpty. Operand 110735 states and 242006 transitions. [2021-03-10 21:24:47,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:24:47,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:47,852 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:48,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:48,052 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:48,052 INFO L82 PathProgramCache]: Analyzing trace with hash -923764673, now seen corresponding path program 228 times [2021-03-10 21:24:48,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:48,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376117466] [2021-03-10 21:24:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:48,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376117466] [2021-03-10 21:24:48,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119777315] [2021-03-10 21:24:48,103 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 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 [2021-03-10 21:24:48,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:24:48,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:48,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:24:48,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:24:48,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:48,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:24:48,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28417768] [2021-03-10 21:24:48,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:24:48,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:48,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:24:48,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:24:48,271 INFO L87 Difference]: Start difference. First operand 110735 states and 242006 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:48,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:48,715 INFO L93 Difference]: Finished difference Result 111907 states and 242798 transitions. [2021-03-10 21:24:48,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:24:48,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:24:48,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:48,871 INFO L225 Difference]: With dead ends: 111907 [2021-03-10 21:24:48,871 INFO L226 Difference]: Without dead ends: 111904 [2021-03-10 21:24:48,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:48,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111904 states. [2021-03-10 21:24:50,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111904 to 109531. [2021-03-10 21:24:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109531 states, 109530 states have (on average 2.175778325572902) internal successors, (238313), 109530 states have internal predecessors, (238313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109531 states to 109531 states and 238313 transitions. [2021-03-10 21:24:50,927 INFO L78 Accepts]: Start accepts. Automaton has 109531 states and 238313 transitions. Word has length 49 [2021-03-10 21:24:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:50,927 INFO L480 AbstractCegarLoop]: Abstraction has 109531 states and 238313 transitions. [2021-03-10 21:24:50,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 109531 states and 238313 transitions. [2021-03-10 21:24:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:24:50,997 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:50,997 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:51,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:51,197 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:51,197 INFO L82 PathProgramCache]: Analyzing trace with hash 961595637, now seen corresponding path program 229 times [2021-03-10 21:24:51,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:51,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281145783] [2021-03-10 21:24:51,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:24:51,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281145783] [2021-03-10 21:24:51,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495372440] [2021-03-10 21:24:51,242 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 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 [2021-03-10 21:24:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:51,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:24:51,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:24:51,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:51,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:24:51,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866923368] [2021-03-10 21:24:51,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:24:51,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:51,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:24:51,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:24:51,406 INFO L87 Difference]: Start difference. First operand 109531 states and 238313 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:51,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:51,852 INFO L93 Difference]: Finished difference Result 111152 states and 241442 transitions. [2021-03-10 21:24:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:24:51,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:24:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:52,009 INFO L225 Difference]: With dead ends: 111152 [2021-03-10 21:24:52,009 INFO L226 Difference]: Without dead ends: 111136 [2021-03-10 21:24:52,009 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111136 states. [2021-03-10 21:24:53,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111136 to 104672. [2021-03-10 21:24:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104672 states, 104671 states have (on average 2.1706967545929627) internal successors, (227209), 104671 states have internal predecessors, (227209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104672 states to 104672 states and 227209 transitions. [2021-03-10 21:24:54,232 INFO L78 Accepts]: Start accepts. Automaton has 104672 states and 227209 transitions. Word has length 49 [2021-03-10 21:24:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:54,232 INFO L480 AbstractCegarLoop]: Abstraction has 104672 states and 227209 transitions. [2021-03-10 21:24:54,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:54,232 INFO L276 IsEmpty]: Start isEmpty. Operand 104672 states and 227209 transitions. [2021-03-10 21:24:54,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:24:54,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:54,329 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:54,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:54,551 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:54,552 INFO L82 PathProgramCache]: Analyzing trace with hash 556227897, now seen corresponding path program 230 times [2021-03-10 21:24:54,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:54,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369558006] [2021-03-10 21:24:54,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:24:54,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369558006] [2021-03-10 21:24:54,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456775680] [2021-03-10 21:24:54,608 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:24:54,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:54,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:54,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:24:54,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 60 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 21:24:54,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:54,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:24:54,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415249656] [2021-03-10 21:24:54,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:24:54,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:54,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:24:54,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:24:54,836 INFO L87 Difference]: Start difference. First operand 104672 states and 227209 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:55,269 INFO L93 Difference]: Finished difference Result 112008 states and 241759 transitions. [2021-03-10 21:24:55,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:24:55,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:24:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:55,419 INFO L225 Difference]: With dead ends: 112008 [2021-03-10 21:24:55,419 INFO L226 Difference]: Without dead ends: 112005 [2021-03-10 21:24:55,420 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:55,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112005 states. [2021-03-10 21:24:56,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112005 to 105674. [2021-03-10 21:24:56,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105674 states, 105673 states have (on average 2.169229604534744) internal successors, (229229), 105673 states have internal predecessors, (229229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105674 states to 105674 states and 229229 transitions. [2021-03-10 21:24:57,521 INFO L78 Accepts]: Start accepts. Automaton has 105674 states and 229229 transitions. Word has length 49 [2021-03-10 21:24:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:57,521 INFO L480 AbstractCegarLoop]: Abstraction has 105674 states and 229229 transitions. [2021-03-10 21:24:57,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 105674 states and 229229 transitions. [2021-03-10 21:24:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:24:57,595 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:57,595 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:57,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:57,816 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:57,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:57,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1021541939, now seen corresponding path program 231 times [2021-03-10 21:24:57,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:57,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271257368] [2021-03-10 21:24:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:24:57,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271257368] [2021-03-10 21:24:57,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804647960] [2021-03-10 21:24:57,870 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 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 [2021-03-10 21:24:57,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 21:24:57,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:24:57,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:24:58,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:58,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:24:58,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418733916] [2021-03-10 21:24:58,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:24:58,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:58,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:24:58,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:24:58,052 INFO L87 Difference]: Start difference. First operand 105674 states and 229229 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:58,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:58,543 INFO L93 Difference]: Finished difference Result 112115 states and 241822 transitions. [2021-03-10 21:24:58,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:24:58,545 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:24:58,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:58,706 INFO L225 Difference]: With dead ends: 112115 [2021-03-10 21:24:58,706 INFO L226 Difference]: Without dead ends: 112103 [2021-03-10 21:24:58,706 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112103 states. [2021-03-10 21:25:00,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112103 to 107326. [2021-03-10 21:25:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107326 states, 107325 states have (on average 2.1642767295597483) internal successors, (232281), 107325 states have internal predecessors, (232281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107326 states to 107326 states and 232281 transitions. [2021-03-10 21:25:00,447 INFO L78 Accepts]: Start accepts. Automaton has 107326 states and 232281 transitions. Word has length 49 [2021-03-10 21:25:00,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:00,447 INFO L480 AbstractCegarLoop]: Abstraction has 107326 states and 232281 transitions. [2021-03-10 21:25:00,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:00,447 INFO L276 IsEmpty]: Start isEmpty. Operand 107326 states and 232281 transitions. [2021-03-10 21:25:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:25:00,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:00,910 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:01,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-03-10 21:25:01,141 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:01,141 INFO L82 PathProgramCache]: Analyzing trace with hash -311108491, now seen corresponding path program 232 times [2021-03-10 21:25:01,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:01,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455858070] [2021-03-10 21:25:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:25:01,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455858070] [2021-03-10 21:25:01,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937137125] [2021-03-10 21:25:01,229 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 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 [2021-03-10 21:25:01,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:01,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:01,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:25:01,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:25:01,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:01,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:25:01,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922610661] [2021-03-10 21:25:01,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:25:01,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:01,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:25:01,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:25:01,413 INFO L87 Difference]: Start difference. First operand 107326 states and 232281 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:01,895 INFO L93 Difference]: Finished difference Result 108240 states and 232891 transitions. [2021-03-10 21:25:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:25:01,897 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:25:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:02,055 INFO L225 Difference]: With dead ends: 108240 [2021-03-10 21:25:02,055 INFO L226 Difference]: Without dead ends: 108228 [2021-03-10 21:25:02,055 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108228 states. [2021-03-10 21:25:03,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108228 to 103265. [2021-03-10 21:25:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103265 states, 103264 states have (on average 2.1579446854663775) internal successors, (222838), 103264 states have internal predecessors, (222838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103265 states to 103265 states and 222838 transitions. [2021-03-10 21:25:03,704 INFO L78 Accepts]: Start accepts. Automaton has 103265 states and 222838 transitions. Word has length 49 [2021-03-10 21:25:03,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:03,704 INFO L480 AbstractCegarLoop]: Abstraction has 103265 states and 222838 transitions. [2021-03-10 21:25:03,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 103265 states and 222838 transitions. [2021-03-10 21:25:03,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:25:03,771 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:03,772 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:03,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-03-10 21:25:03,972 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:03,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:03,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1989442113, now seen corresponding path program 233 times [2021-03-10 21:25:03,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:03,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898852122] [2021-03-10 21:25:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:25:04,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898852122] [2021-03-10 21:25:04,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165801946] [2021-03-10 21:25:04,043 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 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 [2021-03-10 21:25:04,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:25:04,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:04,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:25:04,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:25:04,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:04,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:25:04,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713975613] [2021-03-10 21:25:04,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:25:04,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:04,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:25:04,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:25:04,221 INFO L87 Difference]: Start difference. First operand 103265 states and 222838 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:05,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:05,086 INFO L93 Difference]: Finished difference Result 104033 states and 224074 transitions. [2021-03-10 21:25:05,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:25:05,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:25:05,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:05,225 INFO L225 Difference]: With dead ends: 104033 [2021-03-10 21:25:05,225 INFO L226 Difference]: Without dead ends: 103903 [2021-03-10 21:25:05,225 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103903 states. [2021-03-10 21:25:06,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103903 to 103141. [2021-03-10 21:25:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103141 states, 103140 states have (on average 2.135592398681404) internal successors, (220265), 103140 states have internal predecessors, (220265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103141 states to 103141 states and 220265 transitions. [2021-03-10 21:25:06,744 INFO L78 Accepts]: Start accepts. Automaton has 103141 states and 220265 transitions. Word has length 49 [2021-03-10 21:25:06,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:06,744 INFO L480 AbstractCegarLoop]: Abstraction has 103141 states and 220265 transitions. [2021-03-10 21:25:06,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:06,744 INFO L276 IsEmpty]: Start isEmpty. Operand 103141 states and 220265 transitions. [2021-03-10 21:25:06,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:25:06,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:06,812 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:07,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-03-10 21:25:07,012 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:07,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:07,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1596619917, now seen corresponding path program 234 times [2021-03-10 21:25:07,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:07,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824998020] [2021-03-10 21:25:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 29 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:25:07,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824998020] [2021-03-10 21:25:07,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341014082] [2021-03-10 21:25:07,070 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 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 [2021-03-10 21:25:07,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:25:07,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:07,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:25:07,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:25:07,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:07,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:25:07,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808444690] [2021-03-10 21:25:07,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:25:07,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:07,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:25:07,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:25:07,254 INFO L87 Difference]: Start difference. First operand 103141 states and 220265 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:07,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:07,702 INFO L93 Difference]: Finished difference Result 103620 states and 221040 transitions. [2021-03-10 21:25:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:25:07,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:25:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:08,315 INFO L225 Difference]: With dead ends: 103620 [2021-03-10 21:25:08,316 INFO L226 Difference]: Without dead ends: 103550 [2021-03-10 21:25:08,316 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103550 states. [2021-03-10 21:25:09,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103550 to 103135. [2021-03-10 21:25:09,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103135 states, 103134 states have (on average 2.1305679989140343) internal successors, (219734), 103134 states have internal predecessors, (219734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103135 states to 103135 states and 219734 transitions. [2021-03-10 21:25:09,744 INFO L78 Accepts]: Start accepts. Automaton has 103135 states and 219734 transitions. Word has length 49 [2021-03-10 21:25:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:09,744 INFO L480 AbstractCegarLoop]: Abstraction has 103135 states and 219734 transitions. [2021-03-10 21:25:09,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 103135 states and 219734 transitions. [2021-03-10 21:25:09,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:25:09,810 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:09,810 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:10,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-03-10 21:25:10,011 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:10,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:10,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1597148801, now seen corresponding path program 235 times [2021-03-10 21:25:10,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:10,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948746677] [2021-03-10 21:25:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 37 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:25:10,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948746677] [2021-03-10 21:25:10,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941748834] [2021-03-10 21:25:10,065 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 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 [2021-03-10 21:25:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:10,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:25:10,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 59 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:25:10,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:10,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:25:10,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257350897] [2021-03-10 21:25:10,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:25:10,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:10,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:25:10,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:25:10,281 INFO L87 Difference]: Start difference. First operand 103135 states and 219734 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:10,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:10,762 INFO L93 Difference]: Finished difference Result 104133 states and 221779 transitions. [2021-03-10 21:25:10,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:25:10,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:25:10,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:10,928 INFO L225 Difference]: With dead ends: 104133 [2021-03-10 21:25:10,928 INFO L226 Difference]: Without dead ends: 104127 [2021-03-10 21:25:10,928 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104127 states. [2021-03-10 21:25:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104127 to 103789. [2021-03-10 21:25:12,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103789 states, 103788 states have (on average 2.131229043820095) internal successors, (221196), 103788 states have internal predecessors, (221196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103789 states to 103789 states and 221196 transitions. [2021-03-10 21:25:13,051 INFO L78 Accepts]: Start accepts. Automaton has 103789 states and 221196 transitions. Word has length 49 [2021-03-10 21:25:13,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:13,051 INFO L480 AbstractCegarLoop]: Abstraction has 103789 states and 221196 transitions. [2021-03-10 21:25:13,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:13,051 INFO L276 IsEmpty]: Start isEmpty. Operand 103789 states and 221196 transitions. [2021-03-10 21:25:13,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:25:13,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:13,118 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:13,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:13,318 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:13,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:13,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1191781061, now seen corresponding path program 236 times [2021-03-10 21:25:13,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:13,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671953392] [2021-03-10 21:25:13,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 37 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:25:13,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671953392] [2021-03-10 21:25:13,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764418016] [2021-03-10 21:25:13,365 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 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 [2021-03-10 21:25:13,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:13,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:13,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:25:13,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 59 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:25:13,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:13,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 21:25:13,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973297058] [2021-03-10 21:25:13,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:25:13,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:13,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:25:13,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:25:13,535 INFO L87 Difference]: Start difference. First operand 103789 states and 221196 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:13,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:13,983 INFO L93 Difference]: Finished difference Result 107443 states and 228452 transitions. [2021-03-10 21:25:13,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:25:13,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:25:13,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:14,128 INFO L225 Difference]: With dead ends: 107443 [2021-03-10 21:25:14,129 INFO L226 Difference]: Without dead ends: 107440 [2021-03-10 21:25:14,129 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107440 states. [2021-03-10 21:25:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107440 to 103945. [2021-03-10 21:25:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103945 states, 103944 states have (on average 2.1310513353344107) internal successors, (221510), 103944 states have internal predecessors, (221510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103945 states to 103945 states and 221510 transitions. [2021-03-10 21:25:16,207 INFO L78 Accepts]: Start accepts. Automaton has 103945 states and 221510 transitions. Word has length 49 [2021-03-10 21:25:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:16,207 INFO L480 AbstractCegarLoop]: Abstraction has 103945 states and 221510 transitions. [2021-03-10 21:25:16,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 103945 states and 221510 transitions. [2021-03-10 21:25:16,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:25:16,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:16,288 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:16,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-03-10 21:25:16,511 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:16,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:16,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1657095103, now seen corresponding path program 237 times [2021-03-10 21:25:16,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:16,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662844846] [2021-03-10 21:25:16,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 37 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:25:16,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662844846] [2021-03-10 21:25:16,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39206036] [2021-03-10 21:25:16,568 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 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 [2021-03-10 21:25:16,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:25:16,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:16,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:25:16,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 60 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:25:16,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:16,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 21:25:16,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031329743] [2021-03-10 21:25:16,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:25:16,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:16,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:25:16,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:25:16,772 INFO L87 Difference]: Start difference. First operand 103945 states and 221510 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:17,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:17,281 INFO L93 Difference]: Finished difference Result 107813 states and 229254 transitions. [2021-03-10 21:25:17,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:17,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:25:17,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:17,439 INFO L225 Difference]: With dead ends: 107813 [2021-03-10 21:25:17,439 INFO L226 Difference]: Without dead ends: 107801 [2021-03-10 21:25:17,439 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:17,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107801 states. [2021-03-10 21:25:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107801 to 104405. [2021-03-10 21:25:18,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104405 states, 104404 states have (on average 2.130464350024903) internal successors, (222429), 104404 states have internal predecessors, (222429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:19,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104405 states to 104405 states and 222429 transitions. [2021-03-10 21:25:19,031 INFO L78 Accepts]: Start accepts. Automaton has 104405 states and 222429 transitions. Word has length 49 [2021-03-10 21:25:19,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:19,031 INFO L480 AbstractCegarLoop]: Abstraction has 104405 states and 222429 transitions. [2021-03-10 21:25:19,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 104405 states and 222429 transitions. [2021-03-10 21:25:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:25:19,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:19,101 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:19,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:19,303 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:19,303 INFO L82 PathProgramCache]: Analyzing trace with hash 324444673, now seen corresponding path program 238 times [2021-03-10 21:25:19,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:19,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72751393] [2021-03-10 21:25:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:25:19,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72751393] [2021-03-10 21:25:19,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407606203] [2021-03-10 21:25:19,370 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 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 [2021-03-10 21:25:19,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:19,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:19,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:25:19,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 59 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:25:19,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:19,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:25:19,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472104610] [2021-03-10 21:25:19,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:25:19,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:19,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:25:19,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:25:19,566 INFO L87 Difference]: Start difference. First operand 104405 states and 222429 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:20,544 INFO L93 Difference]: Finished difference Result 105970 states and 225532 transitions. [2021-03-10 21:25:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:25:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:20,693 INFO L225 Difference]: With dead ends: 105970 [2021-03-10 21:25:20,693 INFO L226 Difference]: Without dead ends: 105949 [2021-03-10 21:25:20,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:25:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105949 states. [2021-03-10 21:25:22,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105949 to 104792. [2021-03-10 21:25:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104792 states, 104791 states have (on average 2.130039793493716) internal successors, (223209), 104791 states have internal predecessors, (223209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104792 states to 104792 states and 223209 transitions. [2021-03-10 21:25:22,265 INFO L78 Accepts]: Start accepts. Automaton has 104792 states and 223209 transitions. Word has length 49 [2021-03-10 21:25:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:22,265 INFO L480 AbstractCegarLoop]: Abstraction has 104792 states and 223209 transitions. [2021-03-10 21:25:22,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 104792 states and 223209 transitions. [2021-03-10 21:25:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 21:25:22,334 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:22,334 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:22,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:22,535 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:22,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2013168767, now seen corresponding path program 239 times [2021-03-10 21:25:22,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:22,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869758628] [2021-03-10 21:25:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:25:22,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869758628] [2021-03-10 21:25:22,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408773271] [2021-03-10 21:25:22,610 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:22,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:25:22,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:22,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:25:22,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 58 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 21:25:22,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:22,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:25:22,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180212077] [2021-03-10 21:25:22,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:25:22,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:22,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:25:22,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:25:22,831 INFO L87 Difference]: Start difference. First operand 104792 states and 223209 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:23,865 INFO L93 Difference]: Finished difference Result 105229 states and 223836 transitions. [2021-03-10 21:25:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:25:23,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 21:25:23,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:24,020 INFO L225 Difference]: With dead ends: 105229 [2021-03-10 21:25:24,021 INFO L226 Difference]: Without dead ends: 105208 [2021-03-10 21:25:24,021 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:25:24,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105208 states. [2021-03-10 21:25:25,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105208 to 103734. [2021-03-10 21:25:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103734 states, 103733 states have (on average 2.1289849903116655) internal successors, (220846), 103733 states have internal predecessors, (220846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103734 states to 103734 states and 220846 transitions. [2021-03-10 21:25:25,474 INFO L78 Accepts]: Start accepts. Automaton has 103734 states and 220846 transitions. Word has length 49 [2021-03-10 21:25:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:25,474 INFO L480 AbstractCegarLoop]: Abstraction has 103734 states and 220846 transitions. [2021-03-10 21:25:25,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:25,474 INFO L276 IsEmpty]: Start isEmpty. Operand 103734 states and 220846 transitions. [2021-03-10 21:25:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 21:25:25,538 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:25,538 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:25,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:25,738 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:25,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1555672066, now seen corresponding path program 10 times [2021-03-10 21:25:25,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:25,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778518787] [2021-03-10 21:25:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:25,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778518787] [2021-03-10 21:25:25,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296240242] [2021-03-10 21:25:25,867 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 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 [2021-03-10 21:25:25,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:25,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:25,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:25:25,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:26,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:26,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:25:26,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69485306] [2021-03-10 21:25:26,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:26,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:26,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:26,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:26,070 INFO L87 Difference]: Start difference. First operand 103734 states and 220846 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:26,789 INFO L93 Difference]: Finished difference Result 109277 states and 231415 transitions. [2021-03-10 21:25:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:25:26,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 21:25:26,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:26,942 INFO L225 Difference]: With dead ends: 109277 [2021-03-10 21:25:26,942 INFO L226 Difference]: Without dead ends: 109277 [2021-03-10 21:25:26,942 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 304.8ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:25:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109277 states. [2021-03-10 21:25:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109277 to 104079. [2021-03-10 21:25:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104079 states, 104078 states have (on average 2.1292396087549723) internal successors, (221607), 104078 states have internal predecessors, (221607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104079 states to 104079 states and 221607 transitions. [2021-03-10 21:25:28,953 INFO L78 Accepts]: Start accepts. Automaton has 104079 states and 221607 transitions. Word has length 50 [2021-03-10 21:25:28,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:28,953 INFO L480 AbstractCegarLoop]: Abstraction has 104079 states and 221607 transitions. [2021-03-10 21:25:28,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:28,953 INFO L276 IsEmpty]: Start isEmpty. Operand 104079 states and 221607 transitions. [2021-03-10 21:25:29,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 21:25:29,023 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:29,023 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:29,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:29,224 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:29,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:29,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1056573138, now seen corresponding path program 240 times [2021-03-10 21:25:29,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:29,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073669103] [2021-03-10 21:25:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:29,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073669103] [2021-03-10 21:25:29,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160157417] [2021-03-10 21:25:29,701 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 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 [2021-03-10 21:25:29,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:25:29,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:29,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:25:29,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:31,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:31,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 39 [2021-03-10 21:25:31,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593421491] [2021-03-10 21:25:31,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-03-10 21:25:31,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:31,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-03-10 21:25:31,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1463, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:25:31,118 INFO L87 Difference]: Start difference. First operand 104079 states and 221607 transitions. Second operand has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:33,071 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 21:25:35,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:35,744 INFO L93 Difference]: Finished difference Result 115039 states and 245470 transitions. [2021-03-10 21:25:35,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 21:25:35,746 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 21:25:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:35,903 INFO L225 Difference]: With dead ends: 115039 [2021-03-10 21:25:35,904 INFO L226 Difference]: Without dead ends: 115005 [2021-03-10 21:25:35,904 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 3168.1ms TimeCoverageRelationStatistics Valid=215, Invalid=3445, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 21:25:36,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115005 states. [2021-03-10 21:25:37,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115005 to 107215. [2021-03-10 21:25:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107215 states, 107214 states have (on average 2.1362508627604604) internal successors, (229036), 107214 states have internal predecessors, (229036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:37,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107215 states to 107215 states and 229036 transitions. [2021-03-10 21:25:37,814 INFO L78 Accepts]: Start accepts. Automaton has 107215 states and 229036 transitions. Word has length 50 [2021-03-10 21:25:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:37,814 INFO L480 AbstractCegarLoop]: Abstraction has 107215 states and 229036 transitions. [2021-03-10 21:25:37,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 107215 states and 229036 transitions. [2021-03-10 21:25:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-03-10 21:25:37,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:37,884 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:38,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-03-10 21:25:38,085 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:38,085 INFO L82 PathProgramCache]: Analyzing trace with hash -66547302, now seen corresponding path program 241 times [2021-03-10 21:25:38,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:38,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433908782] [2021-03-10 21:25:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:38,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433908782] [2021-03-10 21:25:38,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768381492] [2021-03-10 21:25:38,565 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 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 [2021-03-10 21:25:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:38,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-03-10 21:25:38,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:39,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:39,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2021-03-10 21:25:39,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742417206] [2021-03-10 21:25:39,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 21:25:39,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:39,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 21:25:39,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:25:39,442 INFO L87 Difference]: Start difference. First operand 107215 states and 229036 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:42,882 INFO L93 Difference]: Finished difference Result 107853 states and 230430 transitions. [2021-03-10 21:25:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:25:42,884 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-03-10 21:25:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:43,031 INFO L225 Difference]: With dead ends: 107853 [2021-03-10 21:25:43,031 INFO L226 Difference]: Without dead ends: 107836 [2021-03-10 21:25:43,031 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1846.8ms TimeCoverageRelationStatistics Valid=143, Invalid=1749, Unknown=0, NotChecked=0, Total=1892 Received shutdown request... [2021-03-10 21:25:43,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107836 states. [2021-03-10 21:25:43,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-03-10 21:25:43,330 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 21:25:43,334 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 21:25:43,334 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 09:25:43 BasicIcfg [2021-03-10 21:25:43,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 21:25:43,335 INFO L168 Benchmark]: Toolchain (without parser) took 738655.69 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.5 MB in the beginning and 10.4 GB in the end (delta: -10.1 GB). Peak memory consumption was 6.2 GB. Max. memory is 16.0 GB. [2021-03-10 21:25:43,335 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 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. [2021-03-10 21:25:43,335 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.85 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:25:43,335 INFO L168 Benchmark]: Boogie Preprocessor took 15.26 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 889.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:25:43,335 INFO L168 Benchmark]: RCFGBuilder took 265.45 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 239.1 MB in the end (delta: -5.7 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:25:43,335 INFO L168 Benchmark]: TraceAbstraction took 738340.28 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 238.5 MB in the beginning and 10.4 GB in the end (delta: -10.1 GB). Peak memory consumption was 6.2 GB. Max. memory is 16.0 GB. [2021-03-10 21:25:43,335 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 0.11 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 25.85 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.26 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 889.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 265.45 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 239.1 MB in the end (delta: -5.7 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 738340.28 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 238.5 MB in the beginning and 10.4 GB in the end (delta: -10.1 GB). Peak memory consumption was 6.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 49). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 738202.8ms, OverallIterations: 255, TraceHistogramMax: 8, EmptinessCheckTime: 9239.5ms, AutomataDifference: 292281.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20311 SDtfs, 42952 SDslu, 273006 SDs, 0 SdLazy, 211063 SolverSat, 5181 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 84538.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15473 GetRequests, 7792 SyntacticMatches, 496 SemanticMatches, 7185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45085 ImplicationChecksByTransitivity, 162623.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=188453occurred in iteration=223, InterpolantAutomatonStates: 6004, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 255336.7ms AutomataMinimizationTime, 255 MinimizatonAttempts, 503227 StatesRemovedByMinimization, 254 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 745.7ms SsaConstructionTime, 3424.0ms SatisfiabilityAnalysisTime, 121873.9ms InterpolantComputationTime, 19922 NumberOfCodeBlocks, 19902 NumberOfCodeBlocksAsserted, 1137 NumberOfCheckSat, 19415 ConstructedInterpolants, 0 QuantifiedInterpolants, 215775 SizeOfPredicates, 1000 NumberOfNonLiveVariables, 18414 ConjunctsInSsa, 5019 ConjunctsInUnsatCore, 507 InterpolantComputations, 3 PerfectInterpolantSequences, 4149/23305 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